喷射制冷与主动式冷梁技术的联合应用研究

Research on the Combined Application of Jet Refrigeration and Active Cooling Beam Technology

初步探讨喷射制冷与冷梁技术的联合应用的效果，利用主动式冷梁技术的高温水侧供冷特性，来提高喷射循环过程的蒸发温度，实现喷射制冷系统整体能效的提高。以R141b作为制冷工质，建立喷射制冷循环模型，利用C^＋＋语言编程计算得到喷射制冷不同工况下的引射系数。研究发现：当环境温度为32℃，冷梁水侧供冷量和风侧供冷量之比m由0提高到2．5，喷射制冷联合冷梁系统能效可从0．24提高到O．40．同时，当m=2．5时，随环境温度变化（28～37℃），能效提高比例在53％-145％之间，联合供冷方式可以显著改善冷凝温度较高时喷射制冷系统的运行效果。

A preliminary analysis for the combined application of jet refrigeration and chilled beam technology was carried out.The high temperature cooling water of active chilled beam technology was utilized to improve the evaporator temperature in jet refrigeration cycle process,and to realize the improvement of the overall energy efficiency of the refrigeration system. With R141 b as refrigerant,the ejector refrigeration cycle model was established to obtain the ejector refrigeration characteristics under different conditions through C+ +programming calculation. The results show that the comprehensive energy utilization rate of the jet refrigeration combined with chilled beam system can be improved from 0. 24 to 0. 40 as the ratio( m) of the water side cooling capacity to air side cooling capacity of the chilled beam increases from 0 to 2. 5 under the condenser temperature of 32 ℃. With the ratio m equal to 2. 5,the increased energy utilization efficiency can be 53% ~ 145% under the environment temperature range of 28 ℃ to37 ℃. Meanwhile,the combined cooling can significantly improve the performance of jet refrigeration system under high condenser temperature.