Energy, Exergy and Economic Analyses of Different Configurations for a Combined HGAX/ORC Cooling System

Zeynab Seyfouri1, Mehran Ameri1, Mozaffar Ali Mehrabian1
1Department of Mechanical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

Tóm tắt

A comparative study is performed to investigate the improved heat-driven refrigeration systems. The systems use a low-temperature heat source to produce low-temperature cooling (− 55 °C). The base system consisted of a hybrid GAX (HGAX) cycle and a Rankine cycle. Three major features for the HGAX cycle are proposed in four configurations to reduce the high temperature of the compressed fluid exiting the compressor. The operating parameters of the systems having the maximum exergy efficiency are computed, and the corresponding performance parameters are applied in all configurations. The results show that the best configuration that has higher exergy efficiency is the one utilizing two compressors in the HGAX cycle. For the heat source temperature of 133.5 °C, this configuration has 34.7% higher energy utilization factor, 33% higher exergy efficiency, 11% lower total product cost, and 28% lower circulating cooling water of the cooling tower than the base system.

Tài liệu tham khảo

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