eCite Digital Repository

Research on efficient defrosting control logic for transcritical CO2 electric vehicle heat pump air-conditioning system

Citation

Wang, A and Cao, F and Fang, J and Fan, J and Yin, X and Wang, X, Research on efficient defrosting control logic for transcritical CO2 electric vehicle heat pump air-conditioning system, International Journal of Refrigeration, 138 pp. 13-22. ISSN 0140-7007 (2022) [Refereed Article]


Preview
PDF
Pending copyright assessment - Request a copy
10Mb

Preview
PDF
Pending copyright assessment - Request a copy
10Mb

DOI: doi:10.1016/j.ijrefrig.2022.03.028

Abstract

The improper defrosting operation would not only cause severe performance deterioration and energy waste but also reduce comfort. The dynamic control strategy of electric vehicle heat pumps is more complicated than that of other heat pumps. To find an efficient defrosting control logic, a transcritical CO2 heat pump test bench for electric vehicles was built. First, the thermodynamic dynamic characteristics in the defrosting process were analyzed, based on which a method for accurately determining the end of defrosting was proposed. Then, a comparative experiment on the core parameters that affected the defrosting speed was carried out, and suggestions for optimizing defrosting control strategy were given. In addition, the dynamic thermodynamic characteristics in the continuous frost-defrosting process under different humidity were further studied. It was found that the humidity decided whether additional dehumidification strategies should be adopted after defrosting. Finally, detailed dynamic control logic of the operation process from heating and frosting to defrosting was proposed. The research will promote the development of the electric vehicle industry by improving defrosting efficiency and meeting the requirements of socially sustainable development through saving energy.

Item Details

Item Type:Refereed Article
Keywords:CO2, defrosting control strategy, electric vehicle, thermodynamic properties, heat pump
Research Division:Engineering
Research Group:Mechanical engineering
Research Field:Energy generation, conversion and storage (excl. chemical and electrical)
Objective Division:Energy
Objective Group:Energy storage, distribution and supply
Objective Field:Energy systems and analysis
UTAS Author:Wang, X (Professor Xiaolin Wang)
ID Code:150257
Year Published:2022
Deposited By:Engineering
Deposited On:2022-06-05
Last Modified:2022-07-26
Downloads:0

Repository Staff Only: item control page