Influence of air temperature and flow conditions on the system performance in the use of R152a in automobile heat pump systems

In this study, the use of R152a in an automobile heat pump system was experimentally investigated under different air temperatures and air flow rates. System performance was determined by changing the air flow rates and temperatures entering the indoor and outdoor units. Operating conditions of R134a and R152a, which used in air conditioning and heat pump systems, are compared. It was determined that the heating capacity of the R152a was higher than that of R134a. It was also seen that the heating capacity of R152a increased with the decreased of the air flow rates at the indoor unit. Besides, it was observed that the effect of air flow conditions on the performance parameters was higher than environmental conditions. Finally, it was determined that R152a can be used as an alternative refrigerant in automotive air conditioning systems when the necessary improvements made