โ๏ธ Transcritical CO2 Refrigeration (R744)
Model commercial transcritical CO2 (R744) refrigeration: optimal gas cooler high-side pressure, cooling COP, compressor power demand, and heat pump heating capacity.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Thermodynamics
๐ Solver Telemetry
โ ACTIVE
๐๏ธ Views
28
โก Solves
25
๐พ Downloads
299
๐ฆ Fortran Code
11.4 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
โ๏ธ Transcritical R744 CO2 Refrigeration & Gas Cooler Loop
Real-time visual simulation: Supercritical gas cooling above critical point (73.8 bar) with optimal high pressure control๐ Configuration & Presets
๐ Supermarket MT Pack (-8ยฐC)
๐ง Commercial LT Freezer (-32ยฐC)
โจ๏ธ EcoCute Water Heat Pump (+5ยฐC)
๐ญ Industrial Cold Store (-15ยฐC)
Transcritical CO2 (R744) Formulation:
โข Optimal High Pressure: Popt โ 2.6 ยท Tgc,out + 7.5 [bar]
โข Cooling Capacity: Qฬcool = แน ยท (h1 โ h4) [kW]
โข Compressor Power: Wฬelec = แน ยท (h2 โ h1) [kW]
โข Cooling COP: COPcool = Qฬcool / Wฬelec
โข Optimal High Pressure: Popt โ 2.6 ยท Tgc,out + 7.5 [bar]
โข Cooling Capacity: Qฬcool = แน ยท (h1 โ h4) [kW]
โข Compressor Power: Wฬelec = แน ยท (h2 โ h1) [kW]
โข Cooling COP: COPcool = Qฬcool / Wฬelec
๐ R744 Cycle Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & Transcritical CO2 Standards
Optimal High-Side Pressure
Unlike subcritical cycles where condensing pressure is fixed by temperature, supercritical $CO_2$ gas cooling exhibits a distinct maximum $COP$ at an optimum pressure $P_{opt} \approx 2.6 T_{gc,out} + 7.5\,\text{bar}$.
Environmental Advantage (ODP = 0, GWP = 1)
Natural refrigerant R744 replaces HFCs/HFOs with zero ozone depletion potential and GWP = 1, complying with EU F-Gas and Kigali amendments.
Key Engineering Assumptions
- Supercritical gas cooling without phase change in the high-pressure heat exchanger.
- Isenthalpic expansion through the high-pressure valve (HPV).
- Applicable to commercial supermarket refrigeration, transport cooling, and EcoCute heat pumps.