管排结构不规则的空调器用翅片管换热器性能仿真
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。
关键词：空调器翅片管换热器性能仿真不规则管排结构通用分布参数模型
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[7] FU L,DING G L,SU Z J,et al.Steady-state simulation of screw liquid chillers[J].Applied thermal engineering,2002,22(15):1731- 1748.
[8] JOLLY P G,TSO C P,WONG Y W,et al.Simulation and measurement on the full-load performance of a refrigeration system in a shipping container[J].International journal of refrigeration,2000,23(2):112- 126.
[9] SUN H R,DING G L,HU H T,et al.A general simulation model for variable refrigerant flow multi-split air conditioning system based on graph theory[J].International journal of refrigeration,2017,82:22- 35.
[10] 林恩新.间冷式冰箱动态仿真通用模型及其验证[D].上海：上海交通大学，2012:117- 118.
[11] SARFRAZ O,BACH C K,BRADSHAW C R.A novel technique for computationally efficient consideration of cross-fin conduction in fin-and-tube heat exchanger models[J].International journal of refrigeration,2019,107:73- 83.
[12] SINGH V,AUTE V,RADERMACHER R.A heat exchanger model for air-to-refrigerant fin-and-tube heat exchanger with arbitrary fin sheet[J].International journal of refrigeration,2009,32(7):1724- 1735.
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[14] GOTO M,INOUE N,ISHIWATARI N.Condensation and evaporation heat transfer of R410A inside internally grooved horizontal tubes[J].International journal of refrigeration,2001,24:628- 638.
[15] WANG C C,HWANG Y M,LIN Y T.Empirical correlations for heat transfer and flow friction characteristics of herringbone wavy fin-and-tube heat exchangers[J].International journal of refrigeration,2002,25(5):673- 680.
[16] NAKAYAMA W,XU L P.Enhanced fins for air-cooled heat exchangers-heat transfer and friction correlations[C]//1st ASME/JSME Thermal Engineering Joint Conference,1983:495- 502.
[17] WANG C C,LEE C J,CHANG C T,et al.Some aspects of plate fin-and-tube heat exchange[J].Journal of enhanced heat transfer,1999,6(5):357- 368.
[18] 邓经生，李征涛，吴会来，等.空调器焓差实验室节能的实验研究[J].低温与超导，2012,40(7):46- 48.
Performance simulation of fin-and-tube heat exchanger for air conditioner with irregular tube row structure
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: air conditioner; fin-and-tube heat exchanger; performance simulation; irregular tube row structure; general distribution parameter model;
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