Novel urban rail transit vehicle air-conditioning control method based on changes of outside temperature and passenger capacity

Abstract

The invention discloses a novel urban rail transit vehicle air-conditioning control method based on changes of outside temperature and passenger capacity. The method includes the following steps that S1, multiple linear regression is conducted according to data obtained by calculating the air temperature outside a vehicle, the passenger capacity of the vehicle and condition parameters of clothes wearing thermal resistance of passengers, and then a two-variable linear in-car temperature control model based on the outside temperature and the passenger capacity and meeting the equation T_in=kl*T_out-k2*n+k3 can be obtained; S2, real-time temperature signals outside the vehicle and in-car passenger capacity signals are collected and are led into the temperature control model in the S1, and then an in-car target control temperature is obtained; S3, real-time temperature values of multiple areas in the vehicle are collected and averaged to obtain an average value, then the average value is compared with the in-car target control temperature obtained in the S2, the working state of a vehicle air-conditioning unit is adjusted automatically according to a comparison result, next the output refrigeration amount of the air-conditioning unit is adjusted, and finally automatic adjustment and control over the in-car temperature is achieved. According to the method, the actual passenger capacity of the vehicle and environment temperature signals outside the vehicle are led simultaneously to serve as variable calculation parameters of the in-car target control temperature, so the in-car target control temperature better meeting passenger capacity thermal comfort requirements can be calculated comprehensively and accurately.

Description

technical field [0001] The invention relates to a rail transit vehicle air conditioning control method and control system, belonging to the technical field of vehicle air conditioning. In particular, it refers to a new air-conditioning control method for urban rail transit vehicles based on changes in outside temperature and passenger capacity. Background technique [0002] The target control temperature of the air-conditioning system in urban rail transit vehicles is the most important factor affecting the thermal comfort of passengers, which directly affects the convection and radiation heat exchange of passengers. At present, since there is no clear standard for setting the control temperature of the air-conditioning system of urban rail transit vehicles in my country, most of them still refer to the UIC553 standard of the European Union of Railways. The temperature control method of the UIC553 standard only introduces the temperature outside the vehicle to control the te...

AI Technical Summary

Problems solved by technology

This temperature control method focuses on controlling the temperature difference between the inside and outside of the car, without considering the impact of passenger capacity on the thermal comfort of passengers in the car

At the same time, due to the different national conditions in Europe and my country, the UIC553 standard applicable to Europe cannot fully meet the actual application of large passenger capacity in my country

On the other hand, unlike railway passenger cars that generally operate in long intervals, urban rail transit vehicles generally operate in short intervals. The frequency of train stops and doors is high, and the variation of passenger capacity in different intervals is quite different, making the actual heat in the carriages The load will also change frequently, and the temperature control method suitable for railway passenger cars with relatively constant passenger flow cannot be fully applied to the temperature control of urban rail transit vehicles

This is also the main reason why the overall level of thermal comfort environment control in passenger compartments of urban rail transit vehicles in my country still cannot fully meet people's requirements, and passengers' complaints about the cold or hot environment in the car are still high.

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