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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0.40.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。
The effect of combined application of jet cooling and chilled beam technology is discussed preliminarily. The high temperature water cooling characteristics of active chilled beam technology are used to improve the evaporation temperature during jetting cycle and improve the overall energy efficiency of jet cooling system. Taking R141b as refrigerant, the injection refrigeration cycle model was established, and the injection coefficient under different operating conditions was calculated and calculated by using C ++ programming language. The results show that when the ambient temperature is 32 ℃, the ratio m of cold side water cooling capacity and wind side cooling capacity increases from 0 to 2.5, the energy efficiency of jet cooling combined with cold beam system can be increased from 0.24 to 0.40. Meanwhile, when m = 2.5, with the change of ambient temperature (28 ~ 37 ℃), the energy efficiency increase rate is between 53% ~ 145%. The combined cooling mode can remarkably improve the operation effect of the jet cooling system when the condensing temperature is high.