Analysis of Operation of Ambient Air Conditioning Systems with Refrigeration Machines of Different Types

Abstract

The processing of ambient air by vapor compression and exhaust heat conversion refrigeration machines with heat removal from them to atmosphere by the circulating cooling systems are studied. Ambient air cooling is conducted by using different types of refrigeration machines: absorption lithium-bromide refrigeration machine (ARM), utilizing the exhaust gas heat of gas engine, combined absorption-ejector refrigeration machine (AERM) and electrically driven vapor compression refrigeration machine (VCRM). The data on current thermal loads on refrigeration machines of different types and their circulating cooling systems with dry cooling towers (air condensers in the case of VCRM) for different their project thermal loads were obtained through modelling their current loading in accordance with actual climatic conditions. The efficiency of performance of refrigeration machines of different types (ARM, combined AERM and VCRM) to provide the target temperatures of cooled air is estimated by annual production of refrigeration according to ambient air conditioning duties. It was shown, that the most energy-efficient refrigeration machine is the ARM, while the most energy-consuming was VCRM.