Ejector cycle, gas-liquid separator to be used for this, and the water heater and the thermal management system using the ejector cycle

摘要

[Summary] while achieving the [challenge] CFC measures, to improve the coefficient of performance of the refrigeration cycle. SOLUTION: In ejector cycle, using carbon dioxide as a refrigerant and vacuum and expanded by the ejector 400 from the supercritical region. Thus, in addition to (= Δh / ΔP) is large ratio of the change amount Δh of enthalpy with respect to the change amount ΔP of pressure as compared to CFC, the pressure difference between the pressure reduction during expansion is increased carbon dioxide, a nozzle 410 It is possible to increase the specific enthalpy difference at the refrigerant outlet of the nozzle 410 and the refrigerant inlet of the (adiabatic heat drop). Also, by placing the supercritical region, the gas-phase refrigerant as well because it has a substantially equal density to the liquid state, the refrigerant is decompressed and expanded by (nozzles 410) the ejector 400, a gas-phase refrigerant also liquid refrigerant is accelerated to a speed approximately equal. For this reason, the energy conversion efficiency of the ejector 400 at (410 nozzles) is increased, the coefficient of performance can be improved.