Study On Simulation And Characteristics Of Composite Refrigeration System With Heat Pipe

Building green computer room attracted more and more attention,how to improve the efficiency of computer room air conditioning is one of the key areas of concern.Composite refrigeration system with heat pipe(HKF)can make full use of outdoor natural cold source that it can save more energy than compression refrigeration system and timesharing dual cooling system.In order to investigate the performance variation law of HKF in complex indoor and outdoor thermal environment,to investigate the differences of natural cold source in different climatic regions of China,to provide an auxiliary analysis tool for the matching design,performance optimization,collaborative operation and automatic control of dual cooling source refrigeration system and provide technical support for selection and application management.Based on the working principle and control mode of HKF,this paper established a simulation model for the performance of the refrigeration system and Based on the idea of modularization,the system performance simulation software was compiled by using Visual Basic 6.0 which can meet the requirement of engineering analysis.Based on the DeST stochastic climate data model,this paper analyzed the applicability of HKF in Harbin,Beijing,Shanghai and Guangzhou.Result: The operation curve of HKF of different cities in the whole year liked “U” and the AEER of Harbin,Beijing and Shanghai were 10.8,8.66 and 6.91 compared to Guangzhou's 4.29 increased by 152%,102%,and 61%.The differences of natural cold source between different climate types are obvious.Based on the DeST stochastic climate data in Beijing,this paper analyzed the influence of the indoor temperature on the system performance.Result: Curve still liked “U” and the AEER of 33??30??27? were 9.9,8.66 and 7.43 compared to 24?'s 6.38 increased by 55%,36%,and 16%,The room temperature setting has a great impact on system performance.HKF can play a greater energy saving effect in the area with lower average annual temperature.And The influence of geographical location on the air conditioning performance should be taken into consideration in the construction planning of computer room.Under the premise of satisfying the normal operation of electronic equipment in the computer room,improving the indoor temperature is beneficial to improve the performance of the hybrid refrigeration system.