Heating performance characteristics of CO 2 heat pump system for electrical vehicle in a cold climate

2018 ◽  
Vol 85 ◽  
pp. 27-41 ◽  
Author(s):  
Dandong Wang ◽  
Bingbing Yu ◽  
Jichao Hu ◽  
Liang Chen ◽  
Junye Shi ◽  
...  
Keyword(s):  
Heat Pump ◽  
Cold Climate ◽  
Performance Characteristics ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Performance ◽  
Electrical Vehicle

Experimental Investigation on Heating Performance of Newly Designed Air Source Heat Pump System for Electric Vehicles

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Kang Li ◽  
Jun Yu ◽  
Rong Yu ◽  
Lin Su ◽  
Yidong Fang ◽  
...  
Keyword(s):  
Heat Pump ◽  
Electric Vehicles ◽  
Flow Characteristics ◽  
Cold Climate ◽  
Positive Temperature ◽  
Pump System ◽  
Cooling Performance ◽  
Heat Pump System ◽  
Heating Performance ◽  
Driving Range

Abstract Utilizing the heat from air source with heat pump system in electric vehicles shows a significant advantage from thermoelectric heat source for heat supply in cold climate. It could improve the driving range of electric vehicles considerably in winter and replace the positive temperature coefficient (PTC) heater with an acceptable cost and reliability. In this work, a newly designed heat pump system was first introduced with less components and cost. Second, experiments were conducted to investigate its cooling performance, and subsequent heating performance from −10 to 10 °C. The typical heat transfer and flow characteristics of refrigerant were recorded, and the behavior of each component including compressor, evaporator, condenser, and outside heat exchanger were analyzed and interpreted. The results showed that the heating and cooling performance of the new heat pump system could almost remain the same with traditional air-conditioning system in automobile and surely satisfy with the heat requirement of electric vehicles. In the heating mode, the maximum heating capacity increases by 13% at 400 m3/h air volume from 300 m3/h at the ambient temperature −10 °C, while the outlet air temperature decreases by 4–6%. In addition, using a heat pump system showed an increase in the driving range of electric vehicles by 25–31% as compared to PTC heaters.

scholarly journals A Study of Optimal Refrigerant Charge Amount Determination for Air-Conditioning Heat Pump System in Electric Vehicles

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 657 ◽  
Author(s):  
Kang Li ◽  
Jun Yu ◽  
Mingkang Liu ◽  
Dan Xu ◽  
Lin Su ◽  
...  
Keyword(s):  
Heat Pump ◽  
Electric Vehicles ◽  
Air Conditioning ◽  
Cold Climate ◽  
Operating Conditions ◽  
Pump System ◽  
Heat Pump System ◽  
Heating Performance ◽  
Correlation Models ◽  
Battery Energy

With regard to concerns about an electric vehicle’s driving range extension in a cold climate, an air-conditioning heat pump (ACHP) shows considerable advantage over thermoelectric heaters for battery energy conservation. The effect of refrigerant charge amount for cooling and heating performance of the ACHP system is significant. The optimal charge, realizing the optimal system performance, is usually determined by experiments of cooling and heating performance. In this paper, the optimal charge determination process based on a newly designed ACHP applied in electric vehicles was introduced. Relationships of characteristics with charge in two modes were investigated by experimental and theoretical methods. Firstly, the performance of the ACHP system was respectively investigated at different charge amounts in cooling and heating operating conditions according to key parameters of system cycles. Secondly, the intersection platforms of subcooling and superheat variation curves with refrigerant charge amount were obtained for determining optimal charge amount of the system further by comprehensive analysis. Finally, the theoretical calculation of charge with three instructive and classical void friction correlation models were applied for better comparisons. It was found that charge amount calculated by the Hughmark model proved to be most consistent with the comprehensive experimental results.

Performance evaluation of propane heat pump system for electric vehicle in cold climate

2018 ◽  
Vol 95 ◽  
pp. 51-60 ◽  
Author(s):  
Cichong Liu ◽  
Yun Zhang ◽  
Tianyuan Gao ◽  
Junye Shi ◽  
Jiangping Chen ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Electric Vehicle ◽  
Heat Pump ◽  
Cold Climate ◽  
Pump System ◽  
Heat Pump System
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