Zhou Weihang, Yin Yonggao, Cheng Xiaosong, et al. Application of Industrial Building Dehumidification and Cooling Air-conditioning System Driven by Low-grade Heat[J]. Journal of refrigeration, 2022, 43(5).
DOI:
Zhou Weihang, Yin Yonggao, Cheng Xiaosong, et al. Application of Industrial Building Dehumidification and Cooling Air-conditioning System Driven by Low-grade Heat[J]. Journal of refrigeration, 2022, 43(5). DOI: 10.3969/j.issn.0253-4339.2022.05.010.
Application of Industrial Building Dehumidification and Cooling Air-conditioning System Driven by Low-grade Heat
The low-grade waste heat resources of industrial buildings are abundant but difficult to utilize
especially when the waste heat is below 80 ℃. The effective recovery and utilization of such waste heat are of great importance for energy conservation and environmental protection. In this study
a low-grade heat-driven dehumidification and cooling air-conditioning system for industrial buildings is proposed. The hot water drives the chiller first and then drives the liquid desiccant dehumidification unit for fresh air
which realizes the cascade utilization of low-grade heat. The system features separate sensible and latent cooling technology
which is manifested by using the liquid desiccant dehumidification fresh air unit forthe latent load and the chiller for the sensible load. The results of this application show that when operating at an average temperature of 77.2 ℃ under a periodically fluctuating heat source temperature
the average coefficient of performance of the chiller is 0.69
which can provide high-temperature chilled water at 15.1–16.3 ℃ and effectively control the thermal environment of the building. The liquid desiccant dehumidification fresh air unit can reduce the humidity ratio of the fresh air from 19.4 to 11.9 g/kg at an average dehumidification efficiency of 61.2%.