Experimental analysis of simultaneous space cooling and hot water gain with water to water heat pump

The heat pump systems have become more common because of several reasons such as; the depletion of fossil fuels, environmental harm caused by the fossil fueled air-conditioning systems and an increased environmental awareness. Heat pumps can be air source, water-borne, ground source due to environment that they transfer or reject the heat. Water is the most efficient way to transfer heat in comparison to other resources. Considering the cooling systems, water-borne systems are more efficient and smaller than air source systems. It is seen that the air temperature values are very high in the Mediterranean region and it decreases the COP (coefficient of performance) of the air source heat pumps. This study investigates the performance, selection criteria and feasibility of a heat pump which transfers the heat to the hot water tank from the cooled space. As a sample experimental analysis, water-borne air pump design has been carried out and the system is used both for the cooling of the Thermodynamics Laboratory of the Engineering Faculty and the energy-exergy analysis of the hot water is based on various parameters. In the summer season , it is calculated that mean heating COP is 2.20, mean cooling COP is 2.55 and combined COP is 4.75. It is observed that the best exergy destruction and improvement potential in the system components was on compressor.