Study of heated accumulator in air-source heat pump with binary mixture

Abstract:

In this paper, an experimental study is presented on the behavior of zeotropic versus azeotropic binary mixtures in heated accumulator air-source heat pump during heating mode. The experimental set up was composed of a fully instrumented air-source heat pump with a capacity of 36,000 BTUH and equipped with a heated suction accumulator. Standard heating mode test conditions were used at the condenser inlet; however, the refrigerant temperatures were varied at the evaporator entrance from 5 to -40 °C, to simulate various conditions encountered in air-source heat pump applications. The primary parameters observed during the course of this study were mass flux, heat flux, quality, thermal capacities, power consumption and pressure ratios for the refrigerants under investigation. The test results showed that a heated suction accumulator helps to evaporate the more volatile component of the binary mixture, thus, increasing the mixture thermal capacity. Furthermore, experiments have also shown capacity increases of 27% with heated accumulator over unheated accumulator at -30 °C outside air temperatures.

Año de publicación:

1998

Keywords:

Fuente:

scopus