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为了揭示热力学排气系统的基本运行规律和为相关仿真程序的开发提供校核数据,设计和研制了一套工作于室温温区的热力学排气系统模拟装置.该装置安装于直径为450mm、体积约为0.11m~3的椭圆封头圆筒形贮箱内,以制冷剂R141b为工质,选取具有代表性的充灌率和罐体热负荷,分别进行了喷射棒单独作用及喷射棒与节流阀、换热器共同作用下的贮箱压力控制实验,获得了相应工况下的压力控制特性.实验结果表明,当贮箱表压控制带下限设定为80kPa,上限设定为90kPa时,在单单依靠喷射棒的喷射混合消除热分层工作模式下,该系统运行超过0.98h后已无法维持压力在设定值以下;而在喷射棒和节流阀、换热器双重作用下,该系统可长期持续工作,2h内制冷剂R141b损失仅约5%(3.35kg),验证了该套系统可以胜任热力学排气过程的模拟.
In order to reveal the basic operation rules of the thermodynamic exhaust system and to provide the calibration data for the development of related simulation programs, a set of thermodynamic exhaust system simulator working at room temperature was designed and developed.The device was installed on a diameter of 450mm, About 0.11m ~ 3 oval head cylindrical tank, the refrigerant R141b as working fluid, select a representative filling rate and tank heat load, respectively, the separate role of the spray bar and spray bar and Throttle valve and heat exchanger, the pressure control characteristics under the corresponding conditions were obtained.The experimental results show that when the lower limit of the tank pressure control zone is set to 80kPa and the upper limit is set to 90kPa , When the system is operated for more than 0.98 hours, the system can not maintain the pressure below the set value under the mode of operation of jet stratification which only depends on the injection mixing of the spray rod. Under the double action of the spray rod and the throttle valve and the heat exchanger , The system can work continuously for a long time, and the loss of R141b refrigerant is only about 5% (3.35kg) within 2h, which verifies that the system can perform the simulation of thermodynamic exhaust process.