Experimental Research of a New Steam Heat Pump System for Recovering Industrial Waste Heat
Publication: Journal of Energy Engineering
Volume 143, Issue 5
Abstract
In accordance with current industrial waste heat and heat requirements, a new steam heat pump system used for recovering industrial waste heat is proposed in this paper which consists of a vapor compression–type high-temperature heat pump (VCHTHP) and an injector heat pump. As the experimental results show, if the primary steam is superheated vapor at 300°C and 3.5 MPa, and the secondary steam is 0.20–0.22 MPa, then compressible steam with a condensing temperature of approximately 160°C can be obtained with a maximum entrainment ratio of 0.39. Through a combination of the VCHTHP and the injector heat pump, the entire heat pump system can recover waste heat from industrial sewage at a temperature of 80°C to produce compressible steam with a condensing temperature of approximately 160°C and a coefficient of performance (COP) of the optimum condition of 1.19. If the compressible steam is used to heat the reboilers in a chemical plant, 28% more high-pressure steam can be saved compared with that from the original heating system, with power consumption only taking 32.5% of the recovered heat.
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Acknowledgments
This research was supported by the 973 National Key Basic Research Program of China (No. 2015CB251403) and the Tianjin Natural Science Foundation (16JCYBJC20500).
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Published In
Journal of Energy Engineering
Volume 143 • Issue 5 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Oct 30, 2016
Accepted: Feb 6, 2017
Published online: May 31, 2017
Published in print: Oct 1, 2017
Discussion open until: Oct 31, 2017
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