基于卡琳娜循环的功冷联供系统热力学分析

发布时间：2018-05-02 20:06

本文选题：卡琳娜循环 + 功冷联供　；参考：《太阳能学报》2017年06期

【摘要】：在传统卡琳娜动力循环基础上,可以增加一个喷射制冷过程进一步利用工质的余压余热能,从而提出一种基于卡琳娜循环的新型功冷联供系统。运用数值求解方程式EES(engineering equation solver)编程计算,分析蒸发压力、和冷凝温度的改变对系统中引射系数及复合系统性能的影响,从热效率、?效率和折合效率3个评价指标对复合系统性能进行综合评价。通过数据分析得出:随着蒸发压力升高,蒸发器吸热量逐渐减小,存在一个最佳的蒸发压力使净输出功达到最大,约为2.6 MPa,但其和引射系数与制冷量及各评价指标成正相关关系;冷凝温度与系统蒸发器吸热量、净输出功、制冷量、引射系数和各评价指标均成负相关关系。结果表明在较高的蒸发压力和较低的冷凝温度下,各评价指标较优。
[Abstract]:On the basis of the traditional Karina cycle, a new combined power cooling system based on Karina cycle is proposed, which can further utilize the residual pressure heat energy of the working fluid in the ejection refrigeration process. The influence of evaporation pressure and condensation temperature on the ejection coefficient and the performance of the composite system is analyzed by using the numerical solution equation EES(engineering equation solver. The performance of composite system is evaluated by three evaluation indexes: efficiency and conversion efficiency. Through data analysis, it is concluded that with the increase of evaporation pressure, the heat absorption of evaporator decreases gradually, and there is an optimum evaporation pressure to maximize the net output work. It is about 2.6 MPA, but the sum ejection coefficient has a positive correlation with the refrigerating capacity and each evaluation index, and the condensing temperature has a negative correlation with the system evaporator heat absorption, net output work, refrigerating capacity, ejection coefficient and each evaluation index. The results show that each evaluation index is better under higher evaporation pressure and lower condensation temperature.
【作者单位】：天津大学中低温热能高效利用教育部重点实验室;天津市宝坻区京东市场建设发展有限公司;天津市宝坻区益安机动车检测有限公司;
【基金】：北京市科技计划(Z111100058911008)
【分类号】：TB657

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