Energy-saving Analysis of Heat Recovery on Water-cooled Chillers
This paper first introduces three kinds of hot water supply schemes commonly used in domestic hot water systems in hot summer and warm winter areas,and analyzes the energy efficiency and energy consumption of the heat source units used in them.Taking air conditioning refrigeration and domestic hot water as a whole,the unit heat consumption index of the three heat source units is specifically calculated.The calculation results of this index show that the recovery of condensation waste heat of water-cooled chiller has obvious energy-saving effect for domestic hot water system,and on this basis,the heat recov-ery temperature of water-cooled chiller with the best operating economy under different ambient tempera-tures is derived,and then the annual energy consumption calculation of heat source unit of domestic hot water system in a hotel project in Foshan,Guangdong Province is proved by an engineering example.In this paper,the energy-saving effect of heat recovery and the influence of heat recovery temperature on the energy-saving effect of water cooled chiller are quantitatively analyzed,in order to provide useful reference and guidance for the application and operation of water cooled chiller heat recovery.
heat recoveryenergy efficiencyenergy consumptionexergyelectricity cons-umption in-dex per unit heating capacityboundary temperature
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