Waste Heat Harvest from Refrigeration Cycle Using Two Stage Heat Exchanger

Abstract

Due to the development of technology and renewable energy and the frequent demand for modern and environmentally friendly technologies to reduce the percentage of pollution in the atmosphere, it requires the search for advanced alternative devices and systems. The purpose of these systems is to reduce the amount of pollution in addition to reducing the consumption of electrical energy and the exploitation of thermal losses resulting from electrical devices, stations, and machines used. In all areas of life. This paper is a theoretical and experimental study aimed at reducing the consumption of electrical energy and the exploitation of wasted thermal energy from the cooling systems used in homes, factories and electric power generation stations, and the extraction of raw materials used in industries and gases resulting from combustion through the collection of waste heat and investing it in heating water. This is done by using two types of heat exchangers helical (tube in tube, shell and tube) to collect waste heat from a split type refrigeration system by utilizing a R410a refrigerant by connecting the exchangers amid the compressor and the condenser of the external unit of the unit. In addition to optimizing the operation of the exchangers by increasing the effective surface area used and using deionized water. Theoretical calculations were carried out using the Engineering Equation Solution (EES) program to find the R410A Pressure-Enthalpy diagram and the performance coefficient c o p and to calculate the efficiency of the work of the system, which should be (12.5-40) %.