AC-02-01-3 -- Compact Counterflow Gas Cooler for R-744

The exit temperature from the gas cooler is an extremely important parameter affecting the efficiency of the transcritical air-conditioning and heat pump cycle. Interest in carbon dioxide as a refrigerant has recently led to the development and testing of several prototypes, all of cross-flow design. This article employs a simulation model to analyze trade-offs (pressure drop vs. heat transfer) involved in approaching counter-flow configuration through multi-slab configurations. It also presents the first experimental confirmation of the model.

Units: SI