Thermal comfort experimental study of non-uniform vehicle environment in chilly freezing and snowstorm

doi:10.3969/j.issn.1674-8484.2022.04.003

Abstract

Abstract:

An evaluation method based on the heating, ventilation and air conditioning (HVAC) automobile air conditioning manikin was proposed to study the thermal comfort of air-conditioning system in asymmetrical vehicle thermal environments. The climate wind tunnel was employed to simulate a chilly freezing and snowstorm atmospheric environment, and based on the HVAC manikin, the local/whole body thermal sensation and comfort in non-uniform and transient vehicle cab was investigated. The results shows that the head temperature is 10.8℃ higher than that of leg after the maximum heating operation of the air conditioner runs for 60 min in face and foot blowing mode. All 14 local comfort values of the manikin are bigger than 0.1 except hands while the overall comfort is 0.1 indicating that the comfort of the segments such as hands will greatly affect the overall comfort in cold condition. The experimental results can provide theoretical guidance for the design of air conditioning duct to optimize the thermal environment distribution in the car cabin to improve the riding comfort of passengers.

Key words: thermal comfort, overall comfort, heating, ventilation and air conditioning(HVAC) manikin, climate wind tunnel, non-uniform and transient

CLC Number:

U461.4，U851

LIN Hongxia, WU Jinmo, SONG Yuhan, LIN Xiaoyong, ZHOU Fan, JI Xiaobo. Thermal comfort experimental study of non-uniform vehicle environment in chilly freezing and snowstorm[J]. Journal of Automotive Safety and Energy, 2022, 13(4): 625-633.

Figures/Tables 14

References 28

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身体部位	温度传感器	风速传感器	热辐射传感器	太阳辐射传感器	湿度传感器
头部	7	7	7	7	1
胸部	3	3	3	3	1
腹部	3	3	3	3	/
背部	1	1	1	1	/
左/右上臂	3×2	3×2	3×2	3×2	/
左/右前臂	1×2	1×2	1×2	1×2	/
左/右手	1×2	1×2	1×2	1×2	/
左/右大腿	4×2	4×2	4×2	4×2	1
左/右小腿	4×2	4×2	4×2	4×2	1
左/右脚	3×2	3×2	3×2	3×2	/
全身合计	46	46	46	46	4

身体部位	温度传感器	风速传感器	热辐射传感器	太阳辐射传感器	湿度传感器
头部	7	7	7	7	1
胸部	3	3	3	3	1
腹部	3	3	3	3	/
背部	1	1	1	1	/
左/右上臂	3×2	3×2	3×2	3×2	/
左/右前臂	1×2	1×2	1×2	1×2	/
左/右手	1×2	1×2	1×2	1×2	/
左/右大腿	4×2	4×2	4×2	4×2	1
左/右小腿	4×2	4×2	4×2	4×2	1
左/右脚	3×2	3×2	3×2	3×2	/
全身合计	46	46	46	46	4

分值	热感觉	分值	舒适性
4	非常热	4	非常舒适
3	热	3	较舒适
2	温度	2	舒适
1	微暖	1	轻微舒适
0	中性	0	适中
-1	微凉	-1	轻微不舒适
-2	凉	-2	不舒适
-3	冷	-3	较不舒适
-4	非常冷	-4	非常不舒适

分值	热感觉	分值	舒适性
4	非常热	4	非常舒适
3	热	3	较舒适
2	温度	2	舒适
1	微暖	1	轻微舒适
0	中性	0	适中
-1	微凉	-1	轻微不舒适
-2	凉	-2	不舒适
-3	冷	-3	较不舒适
-4	非常冷	-4	非常不舒适

部位	最小值			最大值
部位	θ / ℃	热感觉	热舒适性	θ / ℃	热感觉	热舒适性
头部	21.6	-2.5	-1.7	25.2	-0.5	1.8
胸部	25.2	-0.5	3.5	24.2	-0.5	3.5
腹部	18.7	-0.3	0.8	18.3	-0.3	0.8
背部	18.3	0.1	2.7	18.3	0.1	2.7
左大臂	18.2	-0.7	0.4	20.5	-0.7	0.4
右大臂	17.3	-0.8	0.3	22.0	-0.8	0.3
左小臂	16.7	-0.2	0.6	16.7	-0.2	0.6
右小臂	18.2	-0.3	0.3	18.2	-0.3	0.3
左手	14.6	-0.7	0.6	14.6	-0.7	0.6
右手	13.4	-1.2	-0.1	13.4	-1.2	-0.1
左大腿	12.9	-0.7	1.0	18.3	-0.7	1.0
右大腿	15.1	-0.8	0.7	18.3	-0.8	0.7
左小腿	10.1	-1.7	0.3	14.3	-1.7	0.3
右小腿	12.6	-1.5	0.6	15.4	-1.5	0.6
左脚	14.6	-0.4	-0.9	15.4	-0.4	-0.9
右脚	15.8	-0.3	-0.9	18.7	-0.3	-0.9
全身	18.3	0.3	0.1	18.3	0.3	0.1