Energy Investigation on Combined Power, Cooling, and District Water Heating System

Abstract

The current study has taken into account district water heating (DWH), cooling, and power generation systems that are integrated. This study aims to determine the temperature and flow rate of the waste heat from the multifuel research engine, which runs on gasoline, diesel, and biofuel. The waste heat is used in an organic Rankine cycle's (ORC) heat recovery system to produce electricity and also contribute to the environment through a DWH system. The vapor compression refrigeration system is driven by the heat generated by the ORC. This system's performance has been investigated using three distinct working fluids. Engine load and compression ratio are used to assess the whole system's performance. For the working fluids under consideration, the first law assessment is carried out using the Engineering Equation Solver. For the working fluid O-xylene, the maximum energy efficiency value for 80% load conditions is 18.59% with a compression ratio of 17. Given an engine load of 80% and a compression ratio of 16.5 for O-xylene and 15 for M-xylene and ethylbenzene, the highest values of specific network results are 2.656, 2.714, and 2.795 kW, respectively. For the working fluid O-xylene, the maximum energy efficiency value for 80% load conditions is 18.59% with a compression ratio of 17.