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 language | English |
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| Title of host publication | ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems |
| Editors | Wojciech Stanek, Pawel Gladysz, Sebastian Werle, Wojciech Adamczyk |
| Publisher | Institute of Thermal Technology |
| Pages | 1267-1277 |
| Number of pages | 11 |
| ISBN (Electronic) | 9788361506515 |
| Publication status | Published - 2019 |
| Event | 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2019 - Wroclaw, Poland Duration: 2019 Jun 23 → 2019 Jun 28 |
Publication series
| Name | ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems |
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Conference
| Conference | 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2019 |
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| Country/Territory | Poland |
| City | Wroclaw |
| Period | 19/6/23 → 19/6/28 |
Bibliographical note
Funding Information:This work was supported by the Ministry of Trade, Industry & Energy(MOTIE), Korea Institute for Advancement of Technology(KIAT) through the Automobile Parts Cluster Construction Program for the Environment-Friendly Vehicles(P000200044, Development of Integrated Smart Air-Conditioning System for Electric Commercial Vehicles) and Korea Evaluation Institute of Industrial Technology(KEIT) through the Industrial Technology Innovation Program(10084611, Development of fuel cell cooling system and hydrogen fuel cell electric truck for 4~5 ton commercial vehicle)
Publisher Copyright:
© ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. All rights reserved.
Keywords
- Coolant
- Heat pump system
- Heating performance
- Inner condenser
- Triple fluids heat exchanger
ASJC Scopus subject areas
- General Energy
- General Engineering
- General Environmental Science