Dynamic (running) performance of automotive air conditioning systems is closely linked

Call the thermal load calculation mathematical model library, according to the user input parameters, body structure parameters, material parameters and environmental parameters, operating conditions, number of personnel, circulation wind mode, etc., can calculate the basic heat load of various models to meet user requirements . The model library includes the meteorological parameter charts of each typical region, and can calculate the maximum heat load value and hourly heat load chart (in terms of numbers and curves) of different models running in each typical region. Automotive air conditioning system simulation model Automotive air conditioning system simulation model using computer simulation technology for system optimization design. At the same time, the degree of comfort in the interior of the car is closely linked to the dynamic (running) performance of the car's air-conditioning system.

In order to make better use of the in-car comfort index for evaluating the operation of the air-conditioning system, it is also necessary to establish a simulation model of the automobile air-conditioning system. Establishes all parts libraries (compressors, condensers, evaporators, expansion valves, reservoirs, pipes) that are mastered by the user. The contents of the library can be adjusted by the user as needed, and components can be freely selected on the basis of the parts library. Make up the system. Using this model, combined with the automobile's thermal load database, the air supply volume, air supply temperature, and the main operating performance parameters of the refrigeration unit can be simulated and calculated for a given operating condition and control mode of a given air conditioning system. If the air supply volume and air supply temperature in this state are compared with the air supply volume and air supply temperature satisfying the comfort requirements, the air conditioning system can be optimized by modifying the parameters of the air conditioning system equipment and repeatedly calculating the comparison. Simulated calculation of the air conditioning system that can simulate the bench test. The user can select components, modify component parameters, and compose required system simulation models as needed. The model library is mainly used for computational simulation of variable displacement compressors and fixed displacement compressors with the working fluid HFC134a. The user can calculate the given worker by inputting the specified parameters (including the compressor model, refrigerant type, suction temperature, suction pressure, exhaust pressure, exhaust temperature, and compressor rotation speed) according to the requirements on the software interface. The performance of the compressor under various conditions (including several indicators such as cooling capacity, power consumption, cooling factor, refrigerant flow, and outlet temperature).