管排结构不规则的空调器用翅片管换热器性能仿真
Performance simulation of fin-and-tube heat exchanger for air conditioner with irregular tube row structure
摘要：
空调器基本都采用翅片管换热器，包括管排结构规则和管排结构不规则2类型式。翅片管换热器仿真主要针对管排结构规则的换热器，缺少对管排结构不规则翅片管换热器的仿真研究。本文通过分析不规则管排的结构特点，提出了不规则管排换热器的通用描述方法；建立了翅片管换热器的通用分布参数模型和相应的求解算法，并通过实验验证了该模型的准确性。与实验测试结果相比，选取的4种不同管排结构的换热器在额定制冷和额定制热工况下，换热器仿真预测的换热量和制冷剂压降的最大相对误差分别为1.6%和4.0%，表明能够满足换热器设计的精度要求。
Abstract：
Fin-and-tube heat exchangers have been widely used in air conditioners, and they are divided into two types, i.e. the regular tube row structure heat exchanger and the irregular tube row structure heat exchanger. The existing studies on simulation of the fin-and-tube heat exchanger focus on those with regular tube row structure, and the simulation method of the fin-and-tube heat exchanger with irregular tube row structure has not been reported. In this paper, a general description method of the irregular tube row heat exchanger is presented by analysing the structural characteristics of irregular tube row. The general distribution parameter model and solving algorithm of the fin-and-tube heat exchanger are established. The performance simulation of the fin-and-tube heat exchanger with irregular tube row structure is implemented, and the accuracy of this model is verified by experiments. Compared with the experimental results, under the rated cooling and heating conditions, the maximum relative errors of the heat transfer and refrigerant pressure drop for the selected four types of heat exchangers are 1.6% and 4.0%, respectively, which means the simulation results are accurate enough for heat exchanger design.
Keywords:airconditioner;fin-and-tubeheatexchanger;performancesimulation;irregulartuberowstructure;generaldistributionparametermodel