SECTION 01 // FIRST PRINCIPLES
PLANETARY ENERGY INFRASTRUCTURE

THE
TERAWATT
HOUR
SCALING
WALL.

THERMODYNAMIC GRID STORAGE AT CIVILIZATIONAL SCALE

To transition Earth to 100% sustainable energy, we require 240 Terawatt-Hours (TWh) of grid storage. Chemical battery supply chains face an absolute resource limitation. Lithium-ion degrades, poses thermal runaway hazards, and demands unsustainable mining lifecycles.

GigaDome bypasses chemistry entirely. By utilizing Earth's most abundant, non-toxic, non-degrading gas—Carbon Dioxide—in a closed thermodynamic loop, we turn infrastructure into permanent, non-degrading physical assets.

Steel, water, and air. That is how you scale the grid to infinity.

TARGET GLOBAL FLEET CAPACITY
0
Required minimum for full civilizational energy transition
ASSET OPERATIONAL LIFESPAN
0
0.00% Chemical Degradation — perpetual physical asset
ROUND-TRIP EFFICIENCY
0
Optimized closed-loop thermodynamic cycle
RARE EARTH / LITHIUM DEPENDENCY
0
Zero critical mineral supply chain exposure
SECTION 02 // CORE TELEMETRY & MODELING
LIVE CALC ENGINE ACTIVE

GIGADOME 250MW / 1000MWh
THERMODYNAMIC MODELING TOOL

Adjust parameters to model plant dimensions, inventory, and physical footprint in real time. All calculations derived from first-principles enthalpy delta equations.

FIXED PHYSICS ENGINE CONSTANTS:
P₁1.013 bar
|
T₁20.0°C
|
P₃75.0 bar
|
η_comp87.5%
|
η_turb90.0%
|
Δh_turb220 kJ/kg
VARIABLE PARAMETER INPUTS
TARGET PLANT OUTPUT [POWER]
250 MW
10 MW 500 MW
APPLIED EQ: ṁ = Pout [kW] / Δhturbine [kJ/kg]
STORAGE DURATION [TIME]
4 HRS
4 HR 24 HR
APPLIED EQ: Estored = Pout × tdischarge
CYCLE STATE DIAGRAM
S1 1bar/20°C S2 75bar/hot S3 75bar/liq S4 1bar/cold COMPRESSION HEAT REJECTION + STORAGE EXPANSION GAS RETURN LOOP CO₂ CYCLE
PLANT TELEMETRY OUTPUT
REACTIVE
TOTAL STORED ENERGY P × t
1,000.0 MWh
CO₂ MASS FLOW RATE P[kW] / 220 kJ/kg
1,136.4 kg/s
TOTAL CO₂ INVENTORY MASS ṁ × t [s] / 1000
16,363.6 metric tons
LOW-PRESSURE DOME VOLUME M[kg] / ρ(1bar) [1.84 kg/m³]
8,893,265 m³
≈ 260 m sphere equivalent diameter
HIGH-PRESSURE LIQUID TANK VOLUME M[kg] / ρ(75bar) [773 kg/m³]
21,168 m³
Manifolded ASME pressure vessel banks — 106 × 200m³ vessels
COMPRESSION RATIO ANALYSIS
P₃/P₁ RATIO
74.1 : 1
DENSITY RATIO
420 : 1
PHASE STATE
SUPERCRITICAL
CYCLE EFFICIENCY
75.4%
SECTION 03 // INDUSTRIAL COMPONENT MATRIX

SYSTEM SCHEMATIC &
HARDWARE SUBSYSTEM ARCHITECTURE

Full industrial breakdown of the four primary subsystem trains comprising a GigaDome installation. Standards-compliant. Sourced from tier-1 industrial OEMs.

LP
GASHOLDER
→
COMP
COMPRESSION
→
HP
CONTAINMENT
→
EXP
EXPANSION
⟲
GEN
GENERATION
TRAIN 01
THE LOW-PRESSURE
GASHOLDER TRAIN
LOW PRESSURE / 1.013 BAR
PRIMARY MEMBRANE SYSTEM
Multi-layer polyvinylidene fluoride (PVDF) architectural membranes
MATERIAL PVDF / Architectural Grade
OPERATING PRESSURE +15 to +30 mbar buffer
SEALING STANDARD ISO 14689 / Zero-Moisture Ingress
LOW-PRESSURE BLOWER SYSTEM
Variable-speed blower network maintaining constant dome inflation across charge/discharge transients
DUTY TYPE Continuous Variable-Speed
INLET CONDITION Dry CO₂ / <0.5% RH
CORE SYSTEM DUTY
Isolates dry carbon dioxide gas from environmental humidity. Acts as the system lung during rapid discharge phases. Provides variable buffer volume for inventory management across seasonal demand cycles.
TRAIN 02
THE COMPRESSION &
HEAT RECOVERY TRAIN
HIGH PRESSURE / SUPERCRITICAL FLOW
MULTI-STAGE CENTRIFUGAL COMPRESSORS
Integrally geared multi-stage centrifugal compressors achieving P₁→P₃ compression in a single mechanical train
OEM SOURCE MAN Energy Solutions / Siemens STC
ISENTROPIC EFF. η = 87.5%
CODE COMPLIANCE API 617 Centrifugal Compressors
THERMAL ENERGY STORAGE LOOP
Pressurized water accumulator capturing 100% of compression enthalpy for re-injection at turbine inlet
FLUID Pressurized Water — 4.5 bar seal
MAX TEMPERATURE 125°C (no phase change)
VESSEL STANDARD ASME Sec. VIII Div. 2
ENERGY ACCOUNTING
Zero heat rejection to atmosphere during charge phase. All compression enthalpy is stored in the thermal accumulator and returned to the CO₂ stream prior to turbine expansion, directly enabling the 75.4% RTE figure.
TRAIN 03
THE HIGH-DENSITY
CONTAINMENT CORE
75 BAR / LIQUID PHASE CO₂
ASME PRESSURE VESSEL BANKS
Manifolded banks of heavy-walled carbon steel pressure vessels — the primary energy inventory vessel
MATERIAL Carbon Steel — ASME SA-516
DESIGN PRESSURE 100 bar MAWP (75 bar operating)
CERTIFICATION ASME Sec. VIII Div. 1 / PED 2014/68/EU
REFRIGERATION CONDITIONING SYSTEM
Integrated refrigeration chillers maintaining liquid CO₂ stability across ambient summer temperature extremes up to +50°C
TARGET CONDITION 22°C / 75 bar — stable liquid
LIQUID DENSITY ρ = 773 kg/m³
SELF-DISCHARGE RATE
ZERO. The CO₂ inventory is sealed within passive steel vessels. No electrochemical reaction, no ion migration, no capacity fade. A charged GigaDome plant can hold full inventory for months without measurable energy loss — a fundamental thermodynamic advantage over all chemical storage technologies.
TRAIN 04
THE EXOTIC
TURBO-EXPANSION GENERATOR
POWER OUTPUT / GRID SYNCHRONIZATION
SUPERCRITICAL CO₂ EXPANSION TURBINES
High-pressure, multi-stage supercritical CO₂ expansion turbines directly coupled to synchronous generators
OEM CONFIGURATION Ansaldo Energia — Direct-Coupled
ISENTROPIC EFF. η = 90.0%
ENTHALPY DROP Δh = 220 kJ/kg (re-heat)
THERMAL RE-INJECTION HEAT EXCHANGERS
Shell-and-tube or printed-circuit heat exchangers flash liquid CO₂ into high-velocity dense gas using stored compression heat prior to turbine injection
HX TYPE PCHE / Shell & Tube — Hybrid
HEAT SOURCE Train 02 Thermal Accumulator
GENERATOR TYPE Synchronous — 50/60 Hz Grid Sync
GRID RESPONSE CAPABILITY
Turbine train can ramp from cold standby to full output in under 90 seconds, providing critical inertial grid support and black-start capability. This response characteristic is physically impossible with electrochemical systems operating near capacity fade thresholds.
SECTION 04 // 30-YEAR LIFECYCLE ECONOMICS

DEEP FINANCIAL LIFECYCLE
LCOS DETAILED MATRIX

Levelized Cost of Storage comparison — GigaDome Thermomechanical vs. Lithium-Ion Chemical BESS — modeled across a 30-year industrial horizon at 250MW / 1,000MWh scale.

GIGADOME 30-YR LCOS
$0.047
/kWh delivered
No cell replacement. No degradation adjustment.
VS
►
LITHIUM-ION 30-YR LCOS
$0.142
/kWh delivered
After mandatory cell replacements at Y10 & Y20.
COST PARAMETER
GIGADOME
THERMOMECHANICAL
LITHIUM-ION
CHEMICAL BESS
STRUCTURAL
ADVANTAGE
INITIAL CAPACITY CAPEX
Year 0 capital deployment
$650 / kW
Mechanical baseline — compressors, turbines, vessels, civil works
$280 / kW
Short-duration initial cell cost — artificially low at battery door price
NEUTRAL Y0
GigaDome premium justified entirely by lifecycle economics
YEAR 10 REINVESTMENT
Mid-life capital requirement
$0.00
Standard valve, bearing & seal maintenance only. No major capital outlay.
$180–240M
Mandatory full cell replacement due to dendrite degradation and capacity fade below 80% SoH threshold
GD DOMINANT
$200M+ avoided capital expense at Year 10 milestone alone
YEAR 20 REINVESTMENT
Second replacement cycle
$0.00
Original steel vessels and turbomachinery operating at full rated capacity
$200–260M
Second mandatory cell replacement. Cost inflation adjusted. Third-generation chemistry sourcing risk.
GD DOMINANT
Cumulative $400M+ in reinvestment capital avoided over 30-year horizon
ROUND-TRIP DEGRADATION
OVER 30 YEARS
Effective throughput erosion
0.00%
CO₂ molecules are inert. Steel pressure vessels do not age under cyclic load at these conditions. The RTE is a fixed thermodynamic constant.
20–35% fade
Severe capacity fading between replacement cycles. Grid operator must continuously augment nameplate to compensate delivered MWh degradation.
GD DOMINANT
30-year energy delivery guarantee — impossible with any chemical system
SAFETY & LIABILITY PROFILE
Insurance, zoning, hazard classification
INERT GAS
CO₂ is non-flammable and acts as an inherent fire suppressant. Standard industrial pressure vessel insurance. Compatible with urban-adjacent siting.
HIGH RISK
Thermal runaway risk requires mandatory fire suppression systems, toxic gas scrubbing, exclusion zones, and significantly elevated insurance premiums.
GD DOMINANT
Urban/port-adjacent siting unlocks grid-optimal locations unavailable to Li-ion
END-OF-LIFE SALVAGE VECTOR
Asset residual value at decommission
+98% VALUE
High-grade structural steel, copper windings, and precision turbomachinery carry strong secondary market salvage value at decommission
NET NEGATIVE
High environmental recycling liabilities, chemical disposal fees, and lithium extraction costs often result in negative terminal asset value under current regulatory frameworks
GD DOMINANT
GigaDome terminal value is POSITIVE; Li-ion terminal value is a COST CENTER
30-YEAR TOTAL COST OF OWNERSHIP
Normalized to energy delivered (250MW / 8,760 hrs / 30 yrs)
$0.047 / kWh
INCLUDES: CapEx + O&M + No replacement cycles
$0.142 / kWh
INCLUDES: CapEx + 2× full cell replacement + degradation loss + disposal
3.02×
GigaDome delivers the same MWh at 1/3 the lifetime cost of Li-Ion
SECTION 05 // SOVEREIGN CAPITAL PORTAL

SOVEREIGN PRE-FEED &
CAPITAL DEMARCATION PORTAL

Institutional intake gateway for global utilities, EPC firms, and sovereign wealth investors. All transmissions encrypted. Project Engineering response: 1 business cycle.

AUTHORIZED ENGAGEMENT TIERS
PILOT PROGRAM
50MW / 200MWh · Utility demonstration · $32M–45M range
UTILITY SCALE
250MW / 1,000MWh · Grid anchor installation · $160M–220M range
PLANETARY INFRASTRUCTURE
1GW+ · Sovereign grid backbone · Capital structure negotiated
🔐
AES-256 END-TO-END ENCRYPTION
All submissions transmitted via TLS 1.3 to GigaDome secure infrastructure. Zero third-party data exposure.
⚡
1 BUSINESS CYCLE RESPONSE
GigaDome Project Engineering contacts all qualified institutions within 24 business hours of pre-feed submission.