Experimental study on heating performance characteristics of coolant heat-sourced heat pump system in a fuel cell electric vehicle

Hoseong Lee, Jong Phil Won, Choongwon Cho, Manseung Han, Sunan Jeong, Youn Cheol Park, Yongchan Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The objective of this study was to investigate heating performance characteristics of coolant heat-sourced heat pump system in a fuel cell electric vehicle (FCEV). In order to analyse heating performance characteristics of heat pump system with triple fluids heat exchanger between stack cooling coolant and a refrigerant, R-134a, each component in the heat pump system was installed and tested under various operating conditions, such as air inlet temperature of HVAC system and compressor speed. Heating performance of tested system was studied with respect to heating capacity and COP (Coefficient of Performance) after various experiments according to FCEV driving conditions. Because tested system had EXV (Electric Expansion Valve) to control the refrigerant mass flow rate, heating performance was analysed along with EEV opening under certain conditions, such as inlet air temperature and compressor speed. When the air inlet temperature of HVAC system was varied from 0.0℃ to –20.0℃, heating capacity was found to be similar due to somewhat equal temperature difference between inlet and outlet of HVAC system. However, COP increased until certain EEV opening, especially under 45.0%, because of decreasing electric compressor's power consumption. When the compressor speed was varied from 2,000 to 4,000 RPM, while heating capacity increased, COP decreased by higher refrigerant mass flow rate. In the future works, performance characteristics according to stack cooling coolant's operating conditions, such as temperature, coolant volume flow rate, would be analysed with respect to heating capacity, system efficiency, and triple fluid heat exchanger's pressure drop.

Original languageEnglish
Title of host publicationECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
EditorsWojciech Stanek, Pawel Gladysz, Sebastian Werle, Wojciech Adamczyk
PublisherInstitute of Thermal Technology
Pages1267-1277
Number of pages11
ISBN (Electronic)9788361506515
Publication statusPublished - 2019 Jan 1
Event32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2019 - Wroclaw, Poland
Duration: 2019 Jun 232019 Jun 28

Publication series

NameECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems

Conference

Conference32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2019
CountryPoland
CityWroclaw
Period19/6/2319/6/28

Keywords

  • Coolant
  • Heat pump system
  • Heating performance
  • Inner condenser
  • Triple fluids heat exchanger

ASJC Scopus subject areas

  • Energy(all)
  • Engineering(all)
  • Environmental Science(all)

Cite this

Lee, H., Won, J. P., Cho, C., Han, M., Jeong, S., Park, Y. C., & Kim, Y. (2019). Experimental study on heating performance characteristics of coolant heat-sourced heat pump system in a fuel cell electric vehicle. In W. Stanek, P. Gladysz, S. Werle, & W. Adamczyk (Eds.), ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (pp. 1267-1277). (ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems). Institute of Thermal Technology.