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Experimental Research on Factors Influencing Energy Consumption
of Heavy-duty Vehicles Air Conditioning
LU Shaoti
2024, 49(2):
102-109.
DOI: 10.16638/j.cnki.1671-7988.2024.002.019
As the primary energy-consuming accessory within the vehicle, the air conditioning
system has a significant impact on the actual fuel consumption of the vehicle, holding considerable
energy-saving potential. Based on environmental chambers, sunlight simulation devices, chassis
dynamometers, etc., experiments are conducted to test the energy consumption of the air conditio-ning system of a light-duty truck under different environmental temperatures, light intensities, and
testing cycles. The study reveals that under various environmental conditions and testing cycles, the
energy consumption of the vehicle's air conditioning system accounts for 10% to 15% of the total fuel
consumption. Furthermore, compared to the China-world transient vehicle cycle (C-WTVC), under
the China heavy-duty commercial vehicle test cycle-light truck (CHTC-LT), the vehicle experiences
frequent acceleration and deceleration, resulting in more transient engine conditions. This leads to a
3.22% increase in the total fuel consumption. However, under the CHTC-LT, the average engine
speed is 6.15% lower than that of the C-WTVC. At lower speeds, the energy consum- ption of the air
conditioning compressor is correspondingly lower. Therefore, under CHTC-LT, the air conditioning
fuel consumption is approximately reduced by 11.42% compared to C-WTVC. Additionally, the
study finds that the energy consumption of automotive air conditioning and the emission of carbon
pollutants are directly proportional to environmental temperature and light intensity. An increase
of 100 W/m2 in light intensity leads to an approximately 1% increase in air conditioning fuel
consumption.
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