How it works
Core elements
How the tunnel, gateway, GATES, power system and AstroLiner shuttle are arranged.
- The length. ~2050 miles.
- Cutting. An ellipsoid (~17.5 × 12.5 m), optimized for the aerodynamic shape of the hull and the organization of stable magnetic levitation.
- Tunnel depth. Up to ~ 8 km. A deeper deposit is also possible if geological and temperature conditions permit. The accurate depth of the accelerator tunnel can only be determined after a detailed geological exploration: drilling wells along the route, building a temperature profile, The stress of the breed, the cracking and the hydrogeology. The lower the temperature and heat flow of the deep layers (approximately to ~200–250 °C), the wider the range of engineering depths and the greater the freedom to optimize the geometry of the trail (radius of curvature and transition sites), This reduces peak overloads and dynamic loads in the tunnel while maintaining the target speed.
- The design. Combined. Starting point (~330 km) Underground floor straight, going down straight through the direction of the gateway to facilitate displacement. The main part is a deep or underground tunnel for thermal stability, vacuum insulation and safety.
- The geometry of the track. S-shaped arc on the plot after ~330 km.
- The downward bow. Radius ~6300 km, smoothly leads the tunnel to the depth to create the required angle.
- The upward bow. Radius 2500-3500 km, leads the tunnel to the gate at the angle ~5-6° to the horizon. Radiuses are calculated so that the centrifugal acceleration at hypersonic speed does not exceed 4g.
- The vacuum system. Each segment (~50 km) is autonomous, with its own vacuum pumps, sensors, and emergency valves.
Accelerated system
The displacement and stabilization of the hull is achieved by the interaction of its onboard superconducting magnets with the distributed linear electromagnetic drives (wrappers) located in the tunnel. These drives are segmented passive winding of conventional conductors (copper, aluminum) that do not require cryogenic cooling.
- In the initial part of the tunnel (0-330 km). The leads are located Mostly under the canvas, creating a magnetic field for levitation and initial displacement with acceleration 4g, as well as for active gravity compensation.
- In the middle partand (330-2000 km)Especially in the S-ring .e. The reasoning surrounding the tunnel by perimeter, providing precision acceleration, forceful retention of the shuttle in the tunnel center at hypersonic speeds, stabilization of course in turns. The bottom of the end of the tunnel with high radial acceleration uses constructively excess and reinforced winding materials. On the station . 330-2000 km acceleration is decreasing on a curve from 4g at the beginning of the site to 0G at the end. ~11 km/s to the end of the trajectory.
- I 'm going to The last one. parts (2000-2050 km). The last 50 km is designed to stabilize and center before entering the atmosphere through an atmospheric gateway.
The impulse energy from the sub-stations of the GATES is fed into specific segments of the winding in strict synchrony with the position of the shuttle, creating The magnetic field runningThis architecture minimizes the complexity of the tunnel, making it repairable, and transfers high-tech elements to the reusable shuttle.
It eliminates the last mile problem.
Location and design
The slope complex is located on the plateau of Mohi Mountain (~3400 m) in the Democratic Republic of Congo. For future scaling, a large southern slope (16 km south) is reserved, capable of holding dozens of parallel slopes. The structure is a massive structure with a main mechanical lock and gas dynamic barrier systems. It's actually a ground-based stationary jet engine with a triple-ringed propeller pointing at an angle to the sky, but not for body scattering. It's for the atmosphere to be displaced and the buffer to be created when the shuttle enters the atmosphere.
The gas dynamic barrier
The main working element is that the approach of the shuttle will initiate (in a few seconds) the creation of a conical supersonic gas flow, directed outward along the tunnel axis.
- Source and design. The gas dynamic barrier is created by three independent concentric reactive ring motors (belts) or similar hypersonic direct current reacting motors of similar three-belt scheme, installed around the cutting gate and running on air-hydrogen fuel mix. Hydrogen is produced on site by electrolysis. This three-fold excess provides failure resistance: to create an effective barrier, it is enough to operate any two belts, so the system maintains its functionality when one of the three is rejected. Each belt has its own fuel supply, control and ignition system. The belts are located around the outer part of the gateway above each other with steps being shifted backwards from the small belt to the large, the mechanical gateway is inside the gateway behind the cascade of belts. This allows the belt to be started without the need to open the mechanical gate.
- Key functions.
1) Creating a pressure directed outwards for the protection of the tunnel vacuum during the passage of the vessel;
2) Preliminary displacement and heating of atmospheric air in the exit zone in front of the gateway to create a gradient on the median section between the tunnel's vacuum and the atmosphere, which forms a gradient transition between the tunnel's vacuum and the atmosphere.
The gas-barrier is not the aerodynamic protection of the boat and does not shield it from the atmosphere. Its function is to stretch the transition between the mediums in time, converting the almost instantaneous (microsekund) shock load when in contact with cold stationary air into a distributed millisecond load when in contact with heated directed flow. This does not reduce the integral aerodynamic forces, but dramatically reduces the impact (jerk) and high frequency component loads, reducing the risk of local destruction and thermal shock to the structure.
- The flow form. An elliptical cone, corresponding to the tunnel and the boat, ten to hundreds of metres long, protruding out of three rows of ringed sockets of the airlock's jet belts.
The gas-dynamic barrier of the atmospheric gate does not require the formation of a geometrically ideal, stationary or strictly ossimmetrical cone. Its working mode is dynamic in nature, allowing for temporal and spatial fluctuations in form, density and flow rate.
The critical and only hard condition for the work of the gate is to maintain a positive (directed outward) pressure and impulse gradient throughout the ship's output. completely eliminating the penetration of atmospheric air into the tunnel, as well as preliminary gas dynamics and thermal preparation of the atmosphere in the exit zone, This significantly increases the reliability and feasibility of the system.
Thus, the flow form is viewed as an adaptive parameter rather than a target quantity, and is optimized in real time for integral characteristics (pressure, mass expenditure, pulse), It's not a rigid geometry.
- Scalability and testing. Unlike a thousand-kilometer accelerator, the gate structure is modular and easily scalable. Key technologies creating a stable supersonic gas dynamic cone, synchronization, The reactive belt work can be fully worked on full-functional nature stands at scale 1:5 or 1:10, This allows the main technical risks of the project to be eliminated before the full-scale construction of the main road begins.
The security system
Hydrogen work has raised the demands on fire safety. The entire infrastructure of the gate is designed with this in mind: duplicate hydrogen leak detection systems, inertial nitrogen drilling of the highways, explosive-proof running of the equipment, physical separation of the electrical liquefaction equipment, storage and motor belts, and the creation of targeted ventilation channels for safe removal of possible emissions into the atmosphere away from service personnel and critical infrastructure.
Gabarits and starting mass
Length ~150 m, elliptical intersection ~10x15 m. Form of hypersonic clin, optimized for minimal resistance and thermal load when penetrating the atmosphere.
- Optimal starting mass. ~15 000 tons.
The mass of the 15 000 tonne is the result of a search for an engineering and economic optimum, lying in the golden middle between physical limitations and realization possibilities.
| Criteria for the | The lower boundary (< 8 000 – 10 000 t) | Optimum (15 000 t) | The upper limit (> 20 000 – 25 000 t) |
|---|---|---|---|
| Aerodynamics and overloading | The resistance force Fd = ρ·A·v2 creates high overloads a = Fd/m, requiring complex active stabilization and leading to peak heat loads. | The atmospheric resistance causes initial short-term (up to 5 sec) overloads (~3-6g), which allows for simpler depuration and heat protection systems. | Overloads are reduced slightly, but the benefits are levelled by other factors. |
| Heat mode | Low heat capacity. Low m mass leads to rapid temperature rise ΔT = Q·t / (m·c), requiring extreme systems of active cooling. | High thermal inertia: a massive design absorbs and dissipates the peak heat of short-term atmospheric penetration, allowing a combination of passive and active heat protection. | The heat capacity is increasing, but the heat from the massive structure becomes a separate problem. |
| The power of the launch | The energy required E = 1⁄2·m·v2 is acceptable, but does not compensate for the shortcomings. | The clever balance. The displacement energy up to 11 km/s is ~9×10¹⁴ J (~252 GWt·h), which corresponds to the capabilities of the distributed system of GATES and accumulators. | Energy costs are rising linearly, requiring disproportionate increases in storage capacity and capacity, which is not economically viable. |
| Construction and logistics | It's feasible, but it doesn't give the key advantage of an inertial tarn. | The dimensions and mass are compatible with modern shipbuilding docks, welding and transportation methods. | The design is losing its rigidity, there are problems with its own fluctuations, assembly, delivery to the start point, and the cost is rising super-linearly. |
| The philosophy of StarRoad | It's a relatively lightweight device, vulnerable to the atmosphere. | It realizes the paradigm of the inertional tarann: the atmosphere is not a barrier, but a short-term outrage that can be overcome at the expense of mass and strength. | It's becoming an industry-wide challenge, making it impossible to save on scale. |
- Physically is above the threshold (~10 000 t), after which inertia begins to dominate over aerodynamic impact.
- Energy does not lead to an exponential increase in infrastructure requirements.
- Technically remains within the scope of scale-up industrial practices (shipbuilding, heavy machining).
- Economically balances between lowering the cost of the withdrawal by scale and limiting capital expenditure.
Thus, this parameter is the computational optimum that makes StarRoad's concept physically viable and economically justified.
Compounding and systems
The entire interior architecture is designed as a multi-level longitudinal structure with a functional division along the height of the building.
- The bottom and the back of the body fully allocated to energy and power systems: on-board reactor, heat exchangers, active cooling circuits, power converters, energy storage, The heat carrier's main lines and the elements of the marine power plant. This position reduces the center of mass of the shuttle, increasing the stability of the hypersonic flight, planning and conduction, and simplifying the heat and radiation protection of the upper sections.
- Superconducting system of levity and stabilization It's integrated along the hulls of the shuttle and partly in the bottom. The superconducting modules are fixed directly behind the outer shell and heat shielding layer, which minimizes the gap between the magnetic field and the passive shell of the tunnel.
- along the board along the entire length of the hull, including the upper and middle zones to the line of the displacement barrel;
- the middle and back of the bottom;
- except for the exit zones of the main wings and mechanical niches.
This distribution ensures an even magnetic field, high resistance at hypersonic speeds and failure resistance at local damage.
- Middle part of the body The main wings are removed from the interior of the body and isolated from the energy and cargo sections. The front of the middle zone of the nose is used to place small forward control wings used for trajectory correction and stabilization in transition modes.
- The upper part of the body It's designed to accommodate a universal shift module of payload. The module is standardized by size, attachment points, mass and permissible centre of gravity position and can be configured as cargo, tanker, passenger or combined. The module is installed and removed in the dock before launch, and can also be removed in orbit after the upper barrel is opened. The cargo compartment is equipped with a built-in hydraulic or electromechanical lift and guides that allow the automated lifting and removal of the modules in microgravity conditions without the participation of the crew.
- The upper slits They are not a carrier element of the power frame and perform the functions of aerodynamic bypass and orbital access. Once the barrel is fully opened and fixed, the panels are automatically rolled up, and then a refrigerant is applied to the barrel to release excess heat into the vacuum.
- The nose of the boat has a multi-level functional composition:
- the upper nasal zone bridge, control, navigation and communication systems;
- the middle nasal zone of the mechanisms of small forward wings and control surfaces;
- the lower nasal zone of cryogenic fuel tanks and refrigerant, providing minimal hydraulic resistance and maximum rapid cooling access to the nasal cooling systems during atmospheric penetration.
This combination provides short heat and hydraulic circuits, reduces the heat inertia of the nose and increases the reliability of heat protection systems in the most congested part of the flight. The overall design of the shuttle is a rigidly structured, scalable and modular architecture, optimized for hypersonic start, orbital operations, Autonomous navigation and multiple operation without deep overloading of the hull.
The thermal protection of the body
The hull's nose and bottom are equipped with a multilayered composite-metal thermal protection system, designed for extreme heat and dynamic loads during hypersonic flight and subsequent powering. The structure combines passive and active elements and includes:
- an external heat-resistant layer resistant to short-term temperatures of thousands of degrees and intense radiation heating;
- a metallic substrate with a force that perceives mechanical and vibrational loads;
- active cooling contours that ensure the removal of heat from the most stressed areas, primarily the nasal part and the front edge of the bottom;
- replaceable ablation elements in local critical zones designed for controlled wear without damaging the main structure.
The thermal protection system is designed with the heat shock of the heated body in contact with water when landing in the ocean, including sharp temperature gradients and cyclical heat stresses. The architecture provides for segmentation and modular replacement of the most loaded elements during regulated service, which increases repair capacity and resource of multiple use.
Wings
The belt is equipped with two pairs of protruding wings, designed for stabilization, planning and landing.
- Front pair of wings The system is designed to correct trajectories, stabilize tanks and cranes, and dampen dynamic disturbances.
Parameters of each front wing:
- length (range from root): ~35 m;
- width by root / finishing: ~14 / 7 m;
- The area: ~360–400 m2.
- The back wing pair . is the main aerodynamic surface of the boat.
Parameters of each back wing:
- length (range from root): ~100 m;
- width by root / finishing: ~14 / 7 m;
- The area: ~1000–1100 m2.
The total wing area is about 2800–2900 m2. Additional contribution to the lifting force is the carrier form of the fuselage, which increases the effective aerodynamic area by about 20–30%.
In the subsonic mode, the sum configuration provides the orientational aerodynamic quality of L/D ≈ 9–13, which allows for stable planning and controlled selection of landing point. Typical planning and drainage speeds are estimated in the range 90–120 m/s (≈ 320–430 km/h). At such speeds, the safety of landing is determined not by the absolute horizontal speed, but by the vertical touch speed, angle of attack and glyssad profile.
Parachute systems
To reduce the impact loads when driving and expand the permitted landing window, the shuttle is equipped with a multiple parachute-parafoil system, which works as a conditional-state contour of soft landing.
- Architecture and location. The system includes two parafile positions:
- One in the upper feed part;
- One in the upper front part (just past the nose area).
Each position is executed according to the scheme . N+1 (basic + reserve parafoil) with independent layers and elongated lines. cross-sectional line of attachment to the power frame, which reduces local peak loads and increases tank and crane stability. The space of the domes is spread along a longitudinal axis, excluding mutual influence and splashing.
- Places and working mode. The parafoils are not designed to fully hold the weight of the apparatus, but to dampen the vertical speed at the end of the track and form the phase of smooth touch.
- the area of one main parafile: ~4500–6000 m2;
- total active area at the time of working two parafoils: ~9000–12 000 m2.
The target value of the vertical speed at the touch point Vz≈1 m/s.
- Criteria for inclusion. The parachute-parafoil system is used Only if necessary. The landing algorithm takes into account total overload (vector sum of aerodynamic, inertial and hydrodynamic components):
- if the estimated total overload at touch not exceed 4g, landing is performed without use The parafollow (on the wings);
- when The risk The overhead 4g The system activates and reduces the vertical component speed to the target value, translating landing into a smooth slipping mode.
- Recurring. Paraprofils, barbed systems and attachment nodes are designed for multiple use with regulated service (inspection, drying, replacement of rapidly moving elements) without disassembling the body's power frame.
Autonomous power and motor installation
The vest is equipped with a fully autonomous energy-driven system designed for the entire mission cycle: from manoeuvring in orbit to months of autonomous swimming.
- The basic The source The energy of the onboard nuclear reactor.
- Type of the car: A compact fast salt dissolving reactor (SMR) or a high-temperature gas-cooled reactor (HTR) of the next generation. In the future a compact thermonuclear module (for example, based on a field-compression scheme, like Helion Energy).
- Power: electrical 10-20 MW, thermal 50-100 MW.
- The destination: energy supply of all on-board systems, superconducting elements of the magnetolevitation system, electrical and electronic plasma engines (EMPD), active cooling systems and drivers for autonomous swimming. The reactor is designed to operate without re-starting the fuel during the entire life of the shuttle (5-10 years).
- The onboard superconducting levitation and stabilization system. Along the hull of the vessel are cryogenic modules with superconducting magnets based on high-temperature superconductors (HTCs) cooled by liquid nitrogen or hydrogen from the board systems. These magnets create a powerful main magnetic field for levitation and active stabilization (a system of magnetic pendulum). They allow the shuttle to maintain levitation even when the external power supply of the tunnel is completely turned off due to induction interaction with passive wrap-rails (magnetic mirror effect).
The system of stabilization management is built on the hierarchical principle:
- Passive contour (microsekund): the induction connection of superconductors with the tunnel wrap creates a returning force automatically at any shift without the involvement of electronics.
- Hardware contours (microsekund millisecond): specialized schemes (FPGA, ASIC) detect imbalances and switch sections by hard algorithms.
- The programming contour (milliseconds tens of milliseconds): The onboard calculator (with limited AI support) redistributes the currents between the superconducting sections to compensate for slow drift and local imbalances, without requiring a reaction in the nanosecond range.
This architecture provides milliseconds of response time to the shock, which is well above the stability requirements for a 15 000 tonne-tone vessel at hypersonic speeds.
- The main ones The engine: high-pressure electromagnetic plasma engines (EMPDs).
- The principle is: magnetoplasmodynamic (MPD) engines or azimuth-flowing (VASIMR) engines powered by a on-board reactor.
- The pull: up to 50-100 kN (5-10 tonne-force) in impulse mode, which is enough to perform orbital corrections, displacement and interorbital transitions.
- The working body: liquid xenon, argon or hydrogen (also used for cooling systems).
- The autonomy: The engines are controlled by an AI on board, capable of calculating and performing manoeuvres for orbital station connections, unloading and return.
- Heat system The management:
- The moving radiators. Liquid-containing panels deployed in space to release excess heat from the reactor and equipment into the vacuum.
- Phase heat accumulators (TA). Critical elements are located in the nasal part and critical nodes. They absorb peak heat (megajouli) when the atmosphere is penetrated at start and inlet, preventing overheating of the structure. In space or ocean, heat is slowly released through radiators or into the environment.
- The system of active cooling. A closed-loop liquid helium/hydrogen for emergency cooling of the heat shield and critical elements in flight.
- Reserving and safety: Duplicate reactor control systems, independent cooling circuits, emergency heat dissipation devices.
Autonomous landing and marine systems
After being flooded in a given area of the Atlantic, the vessel is converted to a fully autonomous marine vessel.
- The Mobility Complex. Two out-of-the-box wind turbine systems (asymmetrical subduction devices) or water-powered drivers that provide high maneuverability when moving small.
- Energy for swimming. Electricity for drivers and onboard systems the standard onboard nuclear/thermonuclear reactorThe reserve of the active zone is enough for many months of autonomous transitions.
- Navigation and communication. Satellite (GPS/GLONASS), inertial navigation, radar and navigation leaders for surface-recognition.
- The final braking system. For extinguishing the remaining speed (100-150 km/h) before touching the water, the combined system is used: small area brake parachute (for stabilization and initial braking) and short pulse of marching plasma engines (for precise shutting down of vertical speed). The parachute fires after the flood.
This configuration allows the shuttle to travel to the landing port or to the towing point without immediate assistance. It can autonomously hold on to a storm surge, make long transitions and arrive at a designated dock for scheduled service, turning from a spacecraft into a robotic sea vessel.
AstroLiner-S: Started / Simplified
In the early stages of StarRoad's development, as well as as as a basic, technologically simplified and more conservative configuration, the start version of the shuttle AstroLiner-S (Simplified / Start) is provided for .
This modification is a fully functional, yet energetically and systemically simplified version of AstroLiner, designed for initial operation of the main line, early cargo and manned launches, and to reduce the technological, operational and regulatory risks of the system.
- The key The idea AstroLiner-S. AstroLiner-S is implementing the basic StarRoad paradigm inertial tarn of the atmosphere, but without using a nuclear or thermonuclear energy source and with full preservation of the mass-gauge start characteristics of the basic version.
All the energy-extreme operations (disconnection, levitation, stabilization in the tunnel) are fully carried out in the ground infrastructure.
The AstroLiner-S belt is:
- by an autonomous transport apparatus,
- It's a full-fledged recycling machine.
- capable of self-orbiting, descending and returning,
- but using only chemical pull outside the tunnel,
- Not containing on board sources of high-power ionizing radiation.
- Energy and superconducting systems. In the configuration of AstroLiner-S , the following are completely excluded:
- nuclear and thermonuclear power plants,
- radiation, heat and accident risks associated with them,
- The scenes of irreversible tunnel and gateway pollution.
Superconducting elements of levitation, stabilization and interaction with the trail:
- pre-charged before start,
- are transferred to a permanent mode,
- They're isolated from each other and controlled by a flight system.
The power supply of the on-board electronics, control and protection systems is provided by accumulators and inertial accumulators (machines), which are designed for a full cycle of tunnel disassembly with time reserve.
Active control of the superconducting contours in the displacement process is limited to small adjusting currents and emergency modes, which eliminates the need for a high-powered continuous power source on board.
In orbit, folding solar panels are used as an active energy source.
- Motor installation outside the tunnel
All AstroLiner-S orbital operations are performed using chemical pull.
The belt is equipped with:
- medium-traction chemical marching engines (LOX/LH₂ or LOX/LCH₄ class),
- the duplicate guidance and emergency management (RCS) systems .
The motor installation ensures:
- the launching of the aircraft into target orbit after leaving the atmosphere,
- correction of the orbital parameters,
- The orbit is falling,
- controlled entrance and return.
The rejection of the electrical and magnetic plasma engines in this version is due to the absence of a high-powered power source on board and is not considered an architectural limitation of the system as a whole.
- Return and repeated
The AstroLiner-S is capable of:
- autonomous disembarkation from orbit,
- The air is not in the atmosphere.
- aerodynamic planning,
- landing in the ocean using wings and a parachute-parafoil system.
The absence of a reactor makes it much easier:
- maritime exploitation,
- the regulation of services,
- Rehabilitation of the machine after extra-ordinary landings.
- The Role AstroLiner-S I 'm not the development of StarRoad
AstroLiner-S is considered as:
- The first production version of the StarRoad,
- a platform for accumulating launch and failure statistics,
- means of early commissioning of the system,
- basic transport for the initial orbital infrastructure.
As the project progresses, compact high-power power sources emerge and experience builds, the AstroLiner-S can be evolved to complement or replace the full-featured version of AstroLiner, It's equipped with high-powered power plants and electromagnetic plasma engines.
So AstroLiner-S is not a compromise, but a logical start-up system that allows StarRoad to be operated earlier, safer and with fewer system risks, without changing the fundamental architecture of the highway.
The purpose and principle
The project includes the creation of its own integrated energy and climate infrastructure of gigawatts class based on the modified technology Enhanced Geothermal Systems (EGS). As a working body, supercritical carbon dioxide (sCO₂) is used, obtained by direct capture from the atmosphere (Direct Air Capture, DAC). The system combines three critical functions: 1) active management of the geothermal heat field to ensure the thermal stability of the accelerating tunnel; 2) generating basic electricity; 3) long-term utilization of atmospheric CO₂.
The underground architecture of the GATES
To ensure thermal stability, energy independence and durability, each accelerator tunnel is accompanied by a complex of seven small-diameter service tunnels. constituting the integrated system of the GATES:
- Six main collector-energy tunnels (diameter 2 m). They are located at 30 meters below the accelerator tunnel floor level, with an equal step 7 meters between the axes. They work in pairs in the reverse mode of the aggressively over-cooled (+5°C) supercritical CO₂ circulation. This configuration forms a solid cooling plate under the entire accelerator section with a thickness of >15 m, completely excluding heat bridges.
- One technical service tunnel (diameter) 3 (m). It is located on the same level as the accelerator tunnel, in 3 meters on the side. The design of the tunnels of the GATES is designed for the combined impact of high internal pressure (up to 25 MPa), mountain pressure and dynamic loads. The entire seven-tunnel complex is fully robotically fleeted . of the micro-tonneled of the complexes (CPT). The GATES physically and functionally separates energy infrastructure from transport infrastructure, ensuring unprecedented reliability and repair capacity.
Cooling system and TCMC
- It's a deep cooling outline. Under the accelerator tunnel are collector-energy tunnels of the GATES, through which the working body circulates on the basis of CO₂ in a dense high-pressure or supercritical mode. The target temperature range of the cold stream before entering the collectors is about +5...+15°C in the standard low temperature mode. After selecting geothermal heat and passing the depth site CO₂ it can heat up above +100°C depending on the depth, heat flow of the strains and the energy generation mode. The contour diverts geothermal heat, forms a cooling zone under the main tunnel and allows the highway to be laid safely at depths of about 5–8 km.
- Hydrothermal the main channel (GSM) Along the StarRoad route, parallel to the service highway, the LEP and the communications, the hydro-thermal main channel GTMK is being built. It connects the terminals to a single surface heat-draining system.
The GTMK is a water channel about 5–8 m wide and 2–3 m deep. Several independent high-pressure pipelines-smeeviki pass through the bottom of the channel, through which CO₂ is moved between neighboring terminals. Water serves as a heat buffer and intermediate heat carrier.
After turbine, heat exchange or compressor nodes CO₂ enters the serpentine motor with a temperature of approximately +50...+80°C. On the long terminal section of about 50 km, it gives warm water, cooling to about +22...+35°C depending on the season, air humidity, rainfall intensity, radiation cooling and the operating mode of the channel.
The water temperature in the GTMC in the standard mode is maintained at approximately +22...+32°C, with local elevation in hot sections to +35...+45°C. In some areas near the entrance of the hot stream, it is possible to heat water for a short time to +50...+80°C, which may even partially reduce biological activity, but does not make water drinking water without purification.
The upper channel is closed with light selective plates that reflect the sun's rays and allow heat to be released in the infrared range.
- Terminal cooling. Each terminal has a grinder, heat exchanger, pump, booster compressor, turbocharger and backup chiller, and the majority of the low-potential heat is released passively through the GTMC.
Gradiers and heat exchangers conduct flow CO₂ after the GTMC from approximately +22...+35°C to +15...+25°C. When necessary, the reserve chillers should reduce the temperature to -5...+5°C before being fed into the deep collectors. Chillers are not used as a primary permanent mode, but as a peak, emergency or seasonal reserve.
- Booster compression and turbo-de-tender. The next terminal CO₂ is cooled but under high pressure. It can then be directed to the turbo-de-tender, where part of the compression energy is recovered, and the temperature is further reduced by expanding approximately to -10...+5°C depending on the pressure, The cost and phase required.
After that CO₂ is fed into the collector tunnels of the GATES with the required temperature, pressure and phase state. This cycle is not a free energy source: the compressor is running, the channel is shedding the heat of compression, and the turbocharger is only partially restoring the energy used. The useful result is a more cold flow with less load on the active cooling units.
- Reserving and two-way. The pipeline-sweep is designed to be double and two-way, and if one of the lines is damaged, the current is redistributed through the backup pipeline or adjacent terminal. The direction of motion CO₂ may vary depending on the heat load, the emergency mode and the condition of the individual sites.
- Repairing the car. The GTMC is sequenced by locks approximately every kilometer, and when the site is damaged, the segment is isolated, the water level is lowered to a minimum technological level by the pumps or the site is partially dried. After the pressure is released, repair crews or robotic systems have access to the tracks without stopping the entire highway. During repair, cooling is maintained by backup contours, changing the flow direction, increasing heat transfer through adjacent terminals and temporarily turning on the chillers.
- Limited water management function. The GTMC can perform a secondary water-economy function. With a constant east-west slope, the canal is capable of maintaining slow, self-moving water, sections washing, and regulated discharge of excess.
Night equatorial rains can be used to fill the canal through water pits, dams, filters and spillways. Since water does not come into direct contact with CO₂, after local filtration it can be used for limited irrigation, technical water supply of terminals, fire reserves and green protection zones.
This function remains secondary: water is only allowed within the limits that do not violate the main task of the GTMC cooling CO₂ and maintaining the thermal stability of the GATES.
- What is the value of StarRoad. Deep collectors, heat pumps, terminal coolers, gridirons, booster compressors, turbo-de-tander and spare chillers form a single distributed heat management system. It reduces dependence on local refrigeration machines, increases failure resistance, allows for redistribution of heat flows between terminals, and makes deep acceleration tunnel laying more realistic.
The surface cooling system also enhances the economic value of StarRoad: a linear belt of terminals, service roads, power stations, waterways is formed along the route, industrial sites and irrigated agricultural areas.
Integration with technical tunnels and ground terminals
- Integration with the GATES. Under each sloping tunnel, at a depth of additional 10-20 m, collector tunnels of the GATES are passed for pre-freezing and stabilizing the rock at the construction stage and subsequent generation of energy.
- Ground terminal complex. Each sloping tunnel on the surface is completed by a multifunctional ground terminal. Each of the 40 terminals is an independent node that includes:
- Ventilation and gas purification complex to maintain air regime in the tunnel and remove exhaust air.
- The construction base with storage, overloading and temporary storage of modules, soil and building materials.
- The administrative and household for the placement of shift staff (dispatchers, rest rooms, workshops, warehouses).
- Geothermal power station and cooling unitsThe electricity generated by the gas pipeline is the energy efficiency of the gas pipeline.
- Capture and processing station CO₂ (DAC). Direct Air Capture (DCC) provides a closed cycle for the GATES: the extracted CO₂ is liquefied, purified and fed into deep collector tunnels as a heat carrier.
- Connection point to external energy networks and communications (reserved power, broadband channel).
Strategic importance
In addition to energy supply and thermal stabilization, the system's key function is to create a principled and economical super-deep (5-8 km and more) laying of the main accelerating tunnel. Active management of the heat field and the drainage of geothermal flow removes temperature restrictions that otherwise would make such a sinking impossible. This, in turn, allows us to realize the optimal S-shaped geometry of a high-curvature track, This is necessary for the smooth height set and for the exit of the boat at the angle ~5-6° to the horizon, while respecting the permissible overloads for cargo and crew (~4g) on the length of the route in 2050 km. Thus, the GATES is the technological foundation not only for energy but also for all the ballistic optimization of StarRoad's trajectory. The entire complex is operated by a fully robotic micro-TPC fleet.
Power and scale
- The cost of one station 2.5 GW: $2.0–3.0 billion.
- Cost of 40 stations: $80–120 billion.
This assessment is confirmed by the lower limit of costs for Russian GeoTES (according to ITURUP about $650/kWt) and the upper limit for complex projects ($1,500/kWt).
The calculation is based on the upper estimate of the total power of the GATES in 100 GW. The actual available power can only be estimated after geological exploration and can be much lower, up to units of gigawatts. In this case, the funds released go to the construction of alternative energy sources.
Environmental and regional functions
StarRoad is implementing an active environmental service model. The project is the world's largest stationary consumer of atmospheric CO₂, which in supercritical condition is a permanent working body in the closed system of the GATES. Millions of tons of carbon dioxide are being taken out of the atmospheric cycle and locked in a technological outline for centuries. This makes StarRoad a powerful climate engineering tool that offsets the carbon emissions of entire industries.
The GTMC is not just a component of the GATES cooling system, but also a dual-purpose transcontinental infrastructure that benefits the region:
- Irrigation. The drainage canals allow water to be used to irrigate agricultural land along the route, turning the arid areas into the green belt of Africa.
- The natural addition. The canal is automatically filled by frequent equatorial rains.
- The gravitational flow. Due to the natural slope of the terrain (3400 m to the east → 0 m to the west), water moves through the canal alone without pumps, providing free circulation.
- The micro-GES. The rise in heights along the canal allows for a cascade of micro-hydroelectric power plants to generate additional renewable energy for local networks and self-sufficiency.
Thus, StarRoad becomes not only a transportation but also an agro-energy platform integrated into the sustainable development of the region.
The GATES and the power station network provide the surplus green energy not only to the accelerator, but also to nearby cities, industrial enterprises and farms.
Technical perpendicular side tunnels system
To ensure construction, ventilation, repair and evacuation, along the trail through each 50 km is constructed 40 sloping transport tunnels (angle 30°, elliptical intersection ~17.5 × 12.5 m). These tunnels run through the same TPP as the main tunnel and connect the surface to the main highway at a depth of up to 8 km.
- Logistics is what it is. Provide an independent evacuation route for personnel and crew at an emergency stop (Alarm-2). Unlike vertical shafts, the sloping tunnel allows self-propelled machinery to be used to evacuate dozens of people in one flight.
- It's the security. Provide a second independent evacuation route for personnel and crew at an emergency stop (Alarm-2).
- It's scalable. The sloping tunnels serve as a base for connecting future parallel lines of StarRoad. They can drill horizontal branches into new accelerating tunnels, turning the network of approaches into a constantly growing transportation frame.
- Integration with the GATES. Under each sloping tunnel, at a depth of additional 10-20 m, collector tunnels of the GATES are passed for pre-freezing and stabilizing the rock at the construction stage and subsequent generation of energy.
Ground terminal complex
Each sloping tunnel on the surface is completed by a multifunctional ground terminal. Each of the 40 terminals is an independent node that includes:
- A ventilation and gas purification complex to maintain air conditioning in the tunnel and remove exhausted air.
- A building base with storage, reloading and temporary storage of modules, soil and building materials.
- Administrative and household building for shift staff (dispatchers, rest rooms, workshops, warehouses).
- Geothermal power station and cooling facilities integrated into the GATES's common grid that use and manage the heat carrier deep collector tunnels.
- Capture and processing station CO₂ (DAC). Direct air capture (DAC). The closed cycle of the GATES is provided: the extracted CO₂ is liquefied, purified and fed into deep collector tunnels as a heat carrier.
- The connection point to the external power grid and the communication (reserve power, broadband channel).
- Road access (automobile or railway branch) for connecting to the regional transport network.
- Evacuation point (exit to the surface), equipped with a point of emergency medical assistance and a helicopter platform.
Legal and environmental flexibility
The sloping geometry of the technical tunnels allows to take the ground terminals outside the protected areas (national parks, reserves, water catchment areas), Even if the StarRoad itself runs under them at the bottom. This removes the main legal obstacle to the construction of the highway under nature protection zones, excluding the need to build infrastructure within the park boundaries. Each terminal is located on the nearest stretch of unprotected land and connects to the tunnel with a sloping stem, which makes it easier to coordinate, reduces environmental burden and completely eliminates the risk of direct impact on protected ecosystems.
Energy supply and storage system
The StarRoad accelerator power supply system is built as a three-level network that provides:
- Guaranteed reservation (refusal of units does not lead to a stop),
- Adaptive rate of return (from seconds at start to microseconds at finish),
- Minimum length of power cables (loss and inductivity reduction).
The topology levels
Level 0: Primary storage (terminals)
- 40 terminals, each with a park of gravity storage, a hydroelectric power plant (micro-hydroelectric power plant on the channel) and lithium-ion batteries (BESS).
- Total capacity for the terminal: ~5–9 GWh (all ~360 GWh on the track).
- Delivery: a high voltage (up to 100 kV) continuous current through the main cables to the technical tunnel.
Level 1: Segment controllers (50-km segments)
- The trail is divided into 41 segments (by 50 km; the last 50 km to the gate).
- Each segment has a main distribution controller that receives energy from two adjacent terminals (interrupted reservation).
- The segment controller distributes energy across the kilometre energy blocks (by 1 km each), synchronizing their work.
Level 2: Kilometre energy blocks
Each kilometer block has a local controller that:
- It's powered by a segment controller.
- manages buffer lithium-ion batteries (located under the walls of the main tunnel),
- manages the interchangeable packages of wrappers connected via mahogany and ionistors (located behind tunnel walls, in special niches).
Two independent channels from the segment controller to each kilometer block provide reservation.
The architecture of cableways
- The following are the main lines of the railway line (Level 0→1): They are laid in a three-meter technical tunnel (service tunnel) running parallel to the main one at a distance of 3 m.
- Distribution by route: from each terminal, cables go to both sides for 50 km (all 100 km from the terminal), overlapping the operating zones of adjacent terminals. Thus, each segment is fed by at least two terminals (neighbours), which gives a 100% reservation.
- The main tunnel is open: Each 1 km, the cables are removed from the technical tunnel mainly through the seal passages and connected to the kilometer block controller.
- The disconnect inside the block: After the controller , the power is divided into two parallel tracts:
- Tract A: for buffer lithium-ion batteries (capacity ~0.5–1 GWh per block, for smoothing secondary peaks).
- Tract B: The tunnel is connected to the interchangeable winding sets via the mahogany (inertial accumulators) and ionistors (supercapacitors) installed behind the tunnel walls.
Three-zone discharge-rate adaptation
The propulsion profile of the boat is optimized so that the peak power per single pack of wrappers is the highest at the beginning (where no super short pulses are required), and decreases towards the end of the track. This allows you to use different types of storage and switching equipment in different zones:
| Zone | Route section | Discharge timescale | Storage/switching technology | Reason |
|---|---|---|---|---|
| Zone I (low speed) | 0 – 200 km | Seconds to milliseconds | Lithium-ion batteries + standard IGBT inverters | The belt is moving slowly, the flight time is >0.1 s. It is possible to work from BESS without buffers. |
| Zone II (medium speed) | 200 – 1000 km | Milliseconds to microseconds | Buffered lithium-ion storage + flywheels, SiC inverters | The shuttle is gaining speed; faster switching is required, but mechanical flywheels are still viable. |
| Zone III (high speed) | 1000 – 2000 km | Microsecond pulses | Ionistors (supercapacitors) + fast thyristor switches (GTO/IGCT) | The time of the kilometer drops to 0.09 s. Only supercapacitors and nanoseconds-response ionistors can stabilize the pulse. |
It 's important . In Zone III, the energy required is less per kilometer than in Zone I (due to the decrease in acceleration), which reduces the load on the elements despite higher demands on the yield speed.
Reservation and emergency stability
- Duplicate the controllers: Each segment and kilometer controller has a hot reserve (two identical plates with independent power supply).
- Intermittent feeding: Each kilometer block can receive energy not only from its segment controller, but also from neighbouring ones (through backup cables in the technical tunnel).
- Local booking of the rolls: Each kilometer block has three independent bundles of winding, switched alternately. If one set is damaged, the other two continue to work, providing less efficient but non-stop disassembly.
- Disconnect in an emergency: When a short shutdown or overheating is detected, the kilometer controller disconnects the power supply from its block and isolates it through intersectional locks without affecting the adjacent blocks.
Material implementation and conclusions
| The element | Place of location | The function |
|---|---|---|
| Primary storage | On the surface (terminals) | Long-term storage of energy (360 GW·h). |
| Highway cables | Technical tunnel (3 m) | Transferring power from terminals to reserved segments. |
| Segment controllers | Niches in mainly tunnel (each 50 km) | Distribution of energy over 10 kilometers, synchronization. |
| Buffer lithium-ion batteries | Under the walls of the main tunnel | Smoothing secondary peaks in Zones II. |
| Flywheels | Behind the tunnel walls (Zone II) | Buffer for millisecond pulses. |
| Ionizers (supercondensers) | Behind the tunnel walls (Zone III) | Microsecond stabilization, compensation for failure. |
| Local controllers (kilometers) | In the niches, every 1 km | Control of the switch, monitoring of the condition, buffer control. |
| Winding the accelerator | The inner surface of the tunnel | Creating a magnetic field to deflect the boat. |
The advantages of energy supply architecture
- A smooth distribution of load. Peak power is not required simultaneously over the entire length of the tunnel: at the beginning slow pulses, at the end short but less powerful.
- Reservations at all levels. A single terminal, controller or even an entire 50km segment is not shutting down the system neighboring terminals and segments compensate for the lack of power.
- The flexibility of the scale. The addition of new parallel StarRoad lines does not require a redesign of the power system just lay additional mainline cables in the existing technical tunnel.
- Optimizing the cost. Expensive ionistors and mahogany machines are used only where they are really needed (final sections), and cheaper lithium-ion batteries are used at the start of the trail.