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暖通空调杂志社>期刊目次>2018年>第12期

地表水源热泵毛细管换热器多目标模糊优化研究

Multi-objective fuzzy optimization of capillary heat exchanger for surface water-source heat pumps

施志钢 孙福杰 王依梅
青岛理工大学

摘要:

毛细管换热器具有高效和施工方便等特点,作为水源热泵系统的换热器逐渐被重视。但在设计时涉及因素较多,包括管内流速、进出口水温、管长、分路数目等参数,其设计目标也相互影响,因此通过优化设计提高换热器的性能对于节能有重要意义。提出了将传热面积、阻力和传热效率作为3个独立目标函数的换热器多目标优化设计方法,建立了毛细管换热器多目标模糊优化数学模型,采用线性加权法将多目标优化问题转化为单目标优化求解,得到了满足经济性、高效性要求的毛细管换热器设计参数。通过实例计算,与参考文献的设计方法进行对比,证明了该方法的可行性和优越性。

关键词:地表水源热泵,毛细管换热器,模糊理论,多目标,优化设计

Abstract:

With the characteristics of high efficiency and easy installation, capillary heat exchanger is gradually paid more attention as the heat exchanger of water-source heat pump system. However, there are many interacted factors involved in the design stage, including flow velocity in pipes, temperature of inlet and outlet, pipe length and branch number. Therefore, it is of great significance to improve the performance of heat exchanger through optimization design. Proposes a multi-objective optimal design method for heat exchanger using heat transfer area, resistance and heat transfer efficiency as three independent objective functions. Establishes a multi-objective fuzzy optimization mathematical model of capillary heat exchanger. Transforms the multi-objective optimization problem into a single objective optimization solution by linear weighted method. Obtains the design parameters of capillary heat exchanger meeting the requirements of economy and high efficiency. Proves the feasibility and superiority of the method compared a practical calculation with reference methods.

Keywords:surfacewater-sourceheatpump,capillaryheatexchanger,fuzzytheory,multi-objective,optimaldesign

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