双级循环高温热泵换热面积仿真优化设计方法
Optimal design for dual-stage high temperature heat pump by heat exchange area simulation
摘要：
以COP为优化目标，以制热量、冷凝器和蒸发器(简称两器)水侧流速和压降、压缩机排气温度为约束条件，提出了双级循环离心压缩高温热泵系统换热器换热面积仿真优化设计方法。该方法包括两器总换热面积优化、两器面积比优化、回热器与两器面积配比优化3个过程。建立了双级循环高温热泵数值仿真设计系统，并进行了换热器换热面积优化设计。结果表明，换热器换热面积优化设计是解决热泵系统单一部件结构参数不匹配的有效途径；优化设计后，在保证热泵制热性能不变的前提下，两器总面积约降低了8.6%，蒸发换热管总管数减少了35.5%，优化效果显著。
Abstract：
Adopts the COP as optimized object, takes the heating capability, water velocities and pressure drops in the condenser and evaporator, discharge temperature of compressor as constraint conditions, presents an optimal design method, including optimal design for total area of the condenser and evaporator, optimal design for area ratio of the condenser and evaporator, and optimal design for matched area of the regenerator. Designs the heat exchange area with the established numerical simulation design system. The results show that the optimized calculation is an effective solution for the mismatch of single components. With constant heating performance, optimal design indicates an obvious effect with an 8.6% decrease on total area of exchangers and a 35.5% decrease on total number of evaporating heat exchange tubes.
Keywords:high temperature heat pump, heat exchange area, optimal design, simulation