Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance

In pure electric vehicles (PEVs), the thermal management system's energy consumption under cooling conditions constitutes between 9.8 % and 26.9 % of the total vehicle energy expenditure. To enhance the driving range of electric vehicles, it is crucial to reduce the thermal management system�...

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Main Authors: Rongjiang Tang, Lei Guan, Cheng Xu, Yanhong Wei, Xianming Meng, Bin Jia, Shuhan Wen
Format: Article
Language:English
Published: Elsevier 2025-02-01
Series:Case Studies in Thermal Engineering
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2214157X25000620
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author Rongjiang Tang
Lei Guan
Cheng Xu
Yanhong Wei
Xianming Meng
Bin Jia
Shuhan Wen
author_facet Rongjiang Tang
Lei Guan
Cheng Xu
Yanhong Wei
Xianming Meng
Bin Jia
Shuhan Wen
author_sort Rongjiang Tang
collection DOAJ
description In pure electric vehicles (PEVs), the thermal management system's energy consumption under cooling conditions constitutes between 9.8 % and 26.9 % of the total vehicle energy expenditure. To enhance the driving range of electric vehicles, it is crucial to reduce the thermal management system's energy consumption and improve its efficiency. This research investigates the performance variations of thermal management systems under different operating conditions of low-pressure components (fans, blowers and pumps) to enhance COP (coefficient of performance) and decrease energy consumption. The study finds that while increasing the condenser air speed, HVAC (Heating, Ventilation, and Air Conditioning) air volume, and coolant flow the system's COP increase first and then decline, although the compressor's volumetric efficiency consistently improves. Especially, the research identifies a negative correlation between the evaporator's cooling capacity and the battery-side chiller's cooling capacity as HVAC air volume and coolant flow adjust. These insights are meaningful for developing effective system control strategies to boost energy efficiency and optimize cooling capacity distribution. According to analysis above, a control strategy for fans, HVAC blowers, and pumps based on optimal COP has been proposed, which demonstrates a 5.45 %–14.69 % improvement in system COP compared to traditional pressure and temperature-based control methods.
format Article
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institution Kabale University
issn 2214-157X
language English
publishDate 2025-02-01
publisher Elsevier
record_format Article
series Case Studies in Thermal Engineering
spelling doaj-art-33d5686f0397467c976388819563db1d2025-02-02T05:27:30ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105802Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performanceRongjiang Tang0Lei Guan1Cheng Xu2Yanhong Wei3Xianming Meng4Bin Jia5Shuhan Wen6School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, 541004, Guilin, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, 541004, Guilin, ChinaDong Feng Liuzhou Automobile Co., Ltd., 545005, Liuzhou, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, 541004, Guilin, ChinaChina Automotive Technology & Research Center Co., Ltd., 300162, Tianjin, China; Corresponding author.School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, 541004, Guilin, ChinaSchool of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, 541004, Guilin, ChinaIn pure electric vehicles (PEVs), the thermal management system's energy consumption under cooling conditions constitutes between 9.8 % and 26.9 % of the total vehicle energy expenditure. To enhance the driving range of electric vehicles, it is crucial to reduce the thermal management system's energy consumption and improve its efficiency. This research investigates the performance variations of thermal management systems under different operating conditions of low-pressure components (fans, blowers and pumps) to enhance COP (coefficient of performance) and decrease energy consumption. The study finds that while increasing the condenser air speed, HVAC (Heating, Ventilation, and Air Conditioning) air volume, and coolant flow the system's COP increase first and then decline, although the compressor's volumetric efficiency consistently improves. Especially, the research identifies a negative correlation between the evaporator's cooling capacity and the battery-side chiller's cooling capacity as HVAC air volume and coolant flow adjust. These insights are meaningful for developing effective system control strategies to boost energy efficiency and optimize cooling capacity distribution. According to analysis above, a control strategy for fans, HVAC blowers, and pumps based on optimal COP has been proposed, which demonstrates a 5.45 %–14.69 % improvement in system COP compared to traditional pressure and temperature-based control methods.http://www.sciencedirect.com/science/article/pii/S2214157X25000620Pure electric vehiclesThermal managementCoefficient of performanceControl policy
spellingShingle Rongjiang Tang
Lei Guan
Cheng Xu
Yanhong Wei
Xianming Meng
Bin Jia
Shuhan Wen
Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
Case Studies in Thermal Engineering
Pure electric vehicles
Thermal management
Coefficient of performance
Control policy
title Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
title_full Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
title_fullStr Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
title_full_unstemmed Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
title_short Research on control strategies for low-pressure components in integrated thermal management systems based on optimal coefficient of performance
title_sort research on control strategies for low pressure components in integrated thermal management systems based on optimal coefficient of performance
topic Pure electric vehicles
Thermal management
Coefficient of performance
Control policy
url http://www.sciencedirect.com/science/article/pii/S2214157X25000620
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