Analysis of Characteristics of Part of Loading on Air-Conditioning System for Vehicles on Shanghai Metro No.1 Line

On the basis of the real-time statistics data of passenger flow on vehicles for Shanghai Metro No.1 Line,the real-time load of the air-conditioning system on vehicles for Shanghai Metro No.1 Line in the cooling season is calculated,and the part-load characteristics of the air-conditioning system on metro vehicles are analyzed.The analysis result shows that,when the load is within 25%,50% and 75% the nominal value of load of the air-conditioning system on vehicles for Shanghai Metro No.1 Line,the accumulated time is respectively 35%,71% and 92% the operating time of the air-conditioning system on vehicles in the whole cooling season;In the environment temperature range of 24 ℃~34 ℃,the accumulated time of the load of air-conditioning system is about 79% the operating time of the air-conditioning system on vehicles in the whole cooling season.Therefore,if the air-conditioning system on metro vehicles can be operated with fairly high energy efficiency ratio and long time under the part-load working conditions,energy consumed by the air-condition system will saved greatly.