Recovering waste heat from flue gas of combined heat and power plants for district heating in China

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Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
Series
Proceedings Roomvent & Ventilation 2018
Abstract
Currently, the flue gas heat recovery rate is very low in China. But flue gas can contain a large amount of waste heat according to the heat balance of the boiler. In the meantime, flue gas heat loss also dominates different kinds of heat losses for a boiler. Therefore, it is necessary to reduce the flue gas temperature and recover sensible and latent heat for district heating purpose. This paper discusses the application mode of a flue gas scrubber for a combined heat and power (CHP) plant, calculate the flue gas recovery rate using absorption heat pumps and analyse the feasibility for a real case study in China. The results show that the maximum heat recovery rate is about 8% if the flue gas can be cooled down to 30°C, and the payback time for the flue gas scrubber is around 5 years.
Description
Nro 156
Keywords
waste heat, heat recovery, scrubber, combined heat and power (CHP), district heating
Other note
Citation
Wang , H , Wu , X , Duanmu , L & Rämä , M 2018 , Recovering waste heat from flue gas of combined heat and power plants for district heating in China . in Proceedings Roomvent & Ventilation 2018 . SIY Sisäilmatieto Oy , Roomvent & Ventilation Conference , Espoo , Finland , 02/06/2018 .