Conducting exergy analysis by utilizing condenser waste heat in commercial type split air conditioner: a case study

Abstract

The results of this study showed that the modified version of the appliance integrated with the boiler exhibited an increased coefficient of performance (COP) during normal operation when compared with that of the original appliance during normal operation. Thus, the appliance could achieve a significant increase in efficiency while reducing electricity consumption and increasing capacity, thereby heating the water without additional expense. In current models in the market, there is a need for the user to program the timing of hot water using a controller and the appliance operates with a boiler system during the programmed times. These models are difficult to operate. However, once the controller is set, further adjustments are not required; this makes them user-friendly. Once the model has been programmed by the user, the appliance can no longer perform the heating or cooling function in the building while operating the boiler. This gives rise to losses in the comfort and regime of the building, while the appliance continues to consume electricity. Such problems are not recorded in the device as it conducts boiler heating- cooling function in parallel with each other and on the contrary, it continues to comfort the environment without pausing environment heating–cooling and consuming extra electricity while heating the water in the boiler and it also increases the performance of the device. As a result of the above calculations and the results obtained, the COP at the time of normal operation of the appliance was 2.89 and the COP of the appliance modified with the boiler at the time of operation was 4.54. The COP of the appliance increased approximately 1.6 times with the boiler modification. With this application, it has become possible to safeguard both the environment and the users by using domestic hot water for heating in commercial type split air conditioners. For energy saving providers, this value is quite good. This study is aimed at reducing energy consumption and increase efficiency. Schematic description of the application