5 ms·
Actually CO2 works very well, but you typically run it in a transcritical cycle where there is a gas cooler instead of a classical condenser unit.
by semi-extrinsic 4y ago
Actually CO2 works very well, but you typically run it in a transcritical cycle where there is a gas cooler instead of a classical condenser unit.
- marcosdumay 4y agoOr, in other words, for using CO2 efficiently on an environment-temperature heat pump, you need it to sustain higher pressures at both the hot and cool sides, and both the pump and nozzle to survive dealing with a higher density fluid that acts in many ways like a liquid. That explains why people keep searching for a different gas. What is interesting is that it's probably the best gas for that kind of cycle on environment-temperature, as it's too cold for water and amonia, but a low condensing pressure is a benefit here.