冷库制冷系统冷凝器特性研究

【作者】 庄友明； 谢辉霞；

【机构】 集美大学机械工程学院；

【摘要】 本文研究了冷库制冷系统中冷凝器的工作特性。揭示冷凝器传热系数随日益增厚的水侧水垢的影响程度。用热力特性程序对氨单级系统进行模拟、建立冷凝温度(或冷凝器负荷)随外在参数的变化关系、研究传热系数随外侧水垢的变化关系、传热系数变化对冷凝温度和冷凝负荷的影响、借助冷凝温度随制冷系数COP的变化关系来研究水垢增加对系统热力特性的影响,这有利于对系统实际的动态变化进行分析比较,工厂也可据此定出较为节能、经济的运行管理模式。更多还原

【Abstract】 The condensing load varies with the change of outside temperature, both for evaporative type condenser and shell-tube type water-cooling condenser, are analyzed in this paper. For a given type of condenser, the author establishes the mathematical model of refrigeration system’s condensing temperature or condensing load with the change of temperature, reveals the influence level of increasing incrustation on heating transfer coefficient. The author establishes relations between condensing load or condensing temperature and external parameters, heat transfer coefficient and encrustation thickness, coefficient of performance and condensing temperature. The results from above research can be used in the dynamic analysis for factual refrigeration system. The energy saving managing pattern for an actual system can be established based on the research results.更多还原