−30 to 45%
COP drop in transcritical mode
Above the CO₂ critical temperature (31°C) the system stops condensing and the COP falls from 2.8-3.2 to 1.8-2.2.
MARINE SUBCOOLING
Recover the COP you lost with transcritical CO₂.
A titanium heat exchanger submerged in seawater as the condenser's heat sink. It retrofits onto existing CO₂ systems. No chemicals on the coast.
It installs downstream of the gas cooler without altering the rest of the CO₂ system or stopping the plant.
+48%
COP recovered in the 2 MW case
1.9 yr
payback with subsidies
−32%
cooling electricity use
−1,759 MWh
electricity/year avoided
THE PROBLEM
The switch to transcritical CO₂ is environmentally right. Energetically, it costs you.
4-7 months
Per year in transcritical regime
In temperate coastal climates the system runs penalised much of the year, exactly when it coincides with the highest electricity tariffs.
90-110 bar
Sustained discharge pressure
The transcritical regime stresses compressors and shortens their life while wasting high-temperature heat.
THE SOLUTION
A submerged titanium heat exchanger. The sea is your heat sink.
We cool the CO₂ leaving the gas cooler with seawater, returning it close to subcritical conditions even in summer. The port cold-storage operator is the optimal case, but the solution covers the whole coastal cold chain.
PORT MARKETS
0.9-1.2 yr payback
Fish auctions and cold rooms in fishing ports. Pre-existing subsea infrastructure cuts CAPEX by 25-35%.
WHOLESALE COLD CHAIN
1.5-2.0 yr payback
Cold-storage platforms at central wholesale markets on the coast or next to a port.
COASTAL RETAIL
2.0-2.8 yr payback
Logistics distribution centres with cold chain for the large retail chains (typically 5-15 MW of cooling).
FISH PROCESSING
2.5-3.5 yr payback
Canneries and fish-processing plants on the coast, with seasonal demand but high peak-season volumes.
NEXT STEP
Do you run a coastal cold chain on transcritical CO₂?
We start with an energy audit: we analyse your current system and size the marine subcooling.
We reply in under 48h.