Abstract
A heat pump system using solar heating, radiation cooling and air-convective heat transfer, the Sol-Air Heat Pump system, SAHP, was newly developed. This SAHP unit was equipped on the roof of a building in Tokyo and its heating/cooling operational performances have been investigated under various weather conditions in a year. A thermo-dynamical analysis was carried out and compered with the measurements. The measurements of the heat outputs in both heating and cooling operations are in food accordance with the analytical results. The correlation between the measurements and the analysis of the coefficient of performance, COP, are also discussed.
