Study On Simulation Platform For The Car Air-conditioning Refrigeration System

Automobile air-conditioner influencing the competitiveness of enterprises is able to supply passengers with a comfortable environment by controlling the air temperature, humidity, air quality and air flow. It has become the main impact of the comfort of automobile. Designing a automobile air-conditioner which is cheap, safe, comfortable and low-emission becomes a target of many automobile plants. Automobile plants keep improving R&D capacity to meet the requirements of customers and are trying to improve its performance by using of new technology.In order to improve the system of automobile air-conditioner, this paper optimizes simulation platform of air-condition cooling system on the basis of the MDO technology system and application methods, the main work and innovation are as follows:(1)The multidisciplinary design optimization technology system of refrigeration system was established, including similar concepts, mathematical modeling, the design of the system and decomposition of human-machine interfaces and optimization process. The system provides technical support for multidisciplinary design optimization.(2)Based on the structure, speed and temperature, and other disciplines, the model of cooling system with many functions including selection, analysis and optimization was established. It lays theoretical foundation for the design of evaporative condensers(3) The objective function including heat transfer performance, economic performance, quality was selected and a multi-disciplinary design optimization model was established by using chaos adaptive algorithms .The result shows that heat transfer coefficient of condenser k increases 3.88%, design costs S decreased 19.56%, reducing the weight G reduces 7.21 percent, the overall performance of U increases 4.30 percent. Overall, Refrigeration coefficient increases at least 18.5 percent after optimization.(4)The performance of automobile air-conditioner in different condition, such as different vehicle, different passenger number and different frame of Evaporator and condenser, can be simulated by the simulation platform established with multi-disciplinary optimization technology. Such platform also can provide the basis for optimization of evaporator and condenser.