Dynamic Load Calculation and Energy Conservation Strategy Study for

doi:10.3901/JME.2018.18.162

Abstract

Abstract: A dynamic load model of train air conditioner is established. the conduction load is calculated by the reaction coefficient method. The heat of radiation is calculated by the heat balance method. Dynamic hourly load is calculated in "Four vertical and four horizontal" lines and analysis result is given. The trend of the train dynamic load is consistent with the outdoor temperature trend. This is helpful for the matching and control of the air conditioning systems to accurately collect the meteorological parameters during the train running. The EER curve of train air conditioning systems varying with different outdoor conditions is obtained by enthalpy test. The hourly energy consumption of train air conditioner is calculated with the EER and dynamic load. The compressor load ratio of train air conditioning is calculated. Finally, the online control strategy is given according to the compressor load ratio.The conclusion is that two types of air conditioning systems (32 kW and 23 kW) are selected according to the difference of peak cooling capacity in "Four vertical and four horizontal" lines. The maximum difference of load is 16 kW in the same line. Compared with the fixed frequency mode, the power consumption is reduced by the online control mode effectively. In the above conditions, the maximum rate of air conditioning power saving is 30.4% in "Four vertical and four horizontal" high-speed rail lines.

Key words: dynamic load, energy saving strategy, enthalpy experiment, four vertical and four horizontal

CLC Number:

U271.91

LI Chong, WU Jianghong, JIANG Feng. Dynamic Load Calculation and Energy Conservation Strategy Study for "Four Vertical and Four Horizontal" High-speed Rail Air Conditioner[J]. Journal of Mechanical Engineering, 2018, 54(18): 162-169.

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Dynamic Load Calculation and Energy Conservation Strategy Study for "Four Vertical and Four Horizontal" High-speed Rail Air Conditioner

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