High temperature heat pump integration into district heating network
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https://doi.org/10.1016/j.enconman.2020.112719 |
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Title
High temperature heat pump integration into district heating networkDate
2020-04-15Publisher
ElsevierBibliographic citation
MATEU-ROYO, Carlos; SAWALHA, Samer; MOTA-BABILONI, Adrián; NAVARRO-ESBRÍ, Joaquín (2020). High temperature heat pump integration into district heating network. Energy Conversion and Management, v. 210, online 15/4/2020Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S0196890420302570Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
This study illustrates the potential of high temperature heat pumps (HTHPs) integration into district heating network (DHN) through a twofold approach, using DHN as a heat sink and source. It is used as a heat sink ... [+]
This study illustrates the potential of high temperature heat pumps (HTHPs) integration into district heating network (DHN) through a twofold approach, using DHN as a heat sink and source. It is used as a heat sink of HTHP that uses waste heat from the supermarket’s refrigeration system as a heat source whereas it is used as a heat source to HTHP that provides heat to industrial applications. When the DHN acts as the heat sink, the integrated system provides a coefficient of performance (COP) of the waste heat recovery (WHR) system between 3.2 and 5.4, reducing the operating costs between 50% and 100% with an average price ratio of 2.25 compared with the standard CO2 refrigeration system. If the DHN is the heat source, the integrated system provides a COP from 2.8 to 5.7 for a heat sink of 110 °C. The alternative low-GWP refrigerants assessment illustrates that HC-290, HFO-1234ze(E) and HFO-1234yf were considered the ideal candidates to replace the HFC-134a, whereas HCFO-1233zd(E) and HCFO-1224yd(Z) were the most promising low-GWP refrigerants to replace HFC-245fa. Finally, the environmental results showed that the utilisation of the DHN as the heat sink in the integrated system solution produces about 60% lower equivalent CO2 emissions than the DHN generation mix. Moreover, using DHN as the heat source, the equivalent CO2 emissions can be reduced up to 98% in Sweden compared to conventional natural gas boilers. Hence, the combination of HTHPs and the DHN represents a step forward in the mitigation of climate change through the utilisation of sustainable energy conversion technologies. [-]
Is part of
Energy Conversion and Management (2020), v. 210Investigation project
1) Spanish Government for the financial support under projects RTC- 2017-6511-3; 2) Postdoctoral grant FJCI-2016-28324; 3) Universitat Jaume I (Castelló de la Plana, Spain) for the financial support under the projects UJI-B2018-24; 4) PhD grant PREDOC/2017/41 and E-2019-28.Rights
http://rightsstatements.org/vocab/CNE/1.0/
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