Designing of energy saving system with heat recovery and solar air collector

Abstract

In this study, it is aimed to increase the efficiency of heat pump systems, which are generally used for heating in winter. A combined system was created by utilizing the heat pump system, solar air collectors and a heat recovery device. The coefficient of performance of the heat pump system was 6.4 and the efficiency of the solar air collector was 70% while 85% energy efficiency was acquired from the heat recovery device used in the system. The heat recovery device’s energy efficiency was calculated as 85%, while the exergy efficiency was calculated as 40%. The usage of these three systems, which has already high energy-efficiency at separately usage, together in one single system has prevented the decreasing that may occur in the energy efficiency of the systems during the day increased their efficiency. The outdoor air temperature in the winter season significantly reduces the efficiency of heat pump systems, and even many systems work defrost mode. The proposed and experimentally studied system, the operability of the heat pump has been ensured throughout the day. For this process, the system has been able to benefit not only from the solar air collector, but also from the energy of heat recovery device.