空调系统风机盘管换热模型修正方法
摘要：利用设备厂家提供的风机盘管样本性能测试数据，建立了风机盘管换热模型，包括传热系数模型、全热交换效率模型、通用热交换效率模型。对换热模型进行了验证，提出了模型的修正关联式并对修正前后的模型进行了对比。结果表明：全热交换效率模型误差主要源于风机盘管换热过程中的纯逆流假设，模型修正系数主要与风量有关。模型修正前，全热交换效率模型误差为8.9%～21.8%,全热模型计算值误差为12.0%～22.0%,显热误差为8.3%～12.6%,出水温度误差为5.0%～8.5%,出风温度误差为6.6%～10.8%;模型修正后，模型精度及模型预测精度均得到了大幅提升，全热交换效率模型误差小于3.3%,全热模型计算值误差小于7.1%,显热误差小于2.9%,出水温度误差小于3.3%,出风温度误差小于2.5%。风机盘管换热模型简化了需求参数并显著提高了模型精度，可用于风机盘管性能评估与系统优化控制。
关键词：空调系统风机盘管换热模型传热系数换热效率全热交换效率模型修正
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[31] 赵荣义，范存养，薛殿华，等.空气调节[M].4版.北京：中国建筑工业出版社，2008:82.
[2] Building Energy Research Center of Tsinghua University.China building energy use 2018[R/OL].[2022-08-16].https://berc.bestchina.org/Fils/CBEU2018.pdf.
[3] 周海珠，陈晨，张伟.某高校空调系统调适实践[J].暖通空调，2022,52(1):94- 100.
[4] 郁惟昌，胡仰耆，陆城军.风机盘管机组产品的发展沿革与展望[J].暖通空调，2020,50(7):97- 102,52.
[5] 刘新民，潘云钢.风机盘管变流量工况换热特性测试与分析[J].暖通空调，2021,51(1):29- 36,41.
[6] 殷平.空气换热器和调节阀的流量特性研究[J].暖通空调，2021,51(1):1- 9,64.
[7] AFROZ Z,SHAFIULLAH G,URMEE T,et al.Modeling techniques used in building HVAC control systems:a review[J].Renewable and sustainable energy reviews,2018,83:64- 84.
[8] KABELAC S.The transient response of finned crossflow heat exchangers[J].International journal of heat and mass transfer,1989,32(6):1183- 1189.
[9] HILL J,JETER S.A linear subgrid cooling and dehumidification coil model with emphasis on mass transfer[G]//ASHRAE.ASHRAE transactions 1991:part 2.Atlanta:ASHRAE Inc.,1991:118- 128.
[10] KHAN A Y.Heat and mass transfer performance analysis of cooling coils at part-load operating conditions[G]//ASHRAE.ASHRAE transactions 1994:part 1.Atlanta:ASHRAE Inc.,1994:54.
[11] YU X,WEN J,SMITH T F.A model for the dynamic response of a cooling coil[J].Energy and buildings,2005,37(12):1278- 1289.
[12] BRAUN J,KLEIN S,MITCHELL J.Effictiveness models for cooling towers and cooling coils[G]//ASHRAE.ASHRAE transactions 1989:part 2.Atlanta:ASHRAE Inc.,1989:164- 174.
[13] RABEHL R J,MITCHELL J W,BECKMAN W A.Parameter estimation and the use of catalog data in modeling heat exchangers and coils[J].HVAC&R research,1999,5(1):3- 17.
[14] MORISOT O,MARCHIO D,STABAT P.Simplified model for the operation of chilled water cooling coils under nonnominal conditions[J].HVAC&R research,2002,8(2):135- 158.
[15] WANG J F,HIHARA E.Prediction of air coil performance under partially wet and totally wet cooling conditions using equivalent dry-bulb temperature method[J].International journal of refrigeration,2003,26:293- 301.
[16] WANG Y W,CAI W J,SOH Y C,et al.A simplified modeling of cooling coils for control and optimization of HVAC systems[J].Energy conversion and management,2004,45(18/19):2915- 2930.
[17] JIN G Y,CAI W J,WANG Y W,et al.A simple dynamic model of cooling coil unit[J].Energy conversion and management,2006,47(15/16):2659- 2672.
[18] LEE C.A simplified explicit model for determining the performance of a chilled water cooling coil[J].International journal of refrigeration,2014,43:167- 175.
[19] RUIVO C R,ANGRISAN G.Empirical component model to predict the overall performance of heating coils:calibrations and tests based on manufacturer catalogue data[J].Energy conversion and management,2015,89:749- 763.
[20] RUIVO C R,DOMINGUEZ-MUÑOZ F,COSTA J J,et al.Accuracy of simplified heating coil models based on manufacturer catalogue data[J].Thermal science and engineering progress,2017,3:10- 23.
[21] RUIVO C R,DOMINGUEZ-MUÑOZ F,COSTA J J.Simplified model of finned-tube heat exchangers based on the effectiveness method and calibrated with manufacturer and experimental data[J].Applied thermal engineering,2017,111:340- 352.
[22] MARTINCEVIC'A, VAŠAK M, LEŠIC'V.Identification of a control-oriented energy model for a system of fan coil units[J].Control engineering practice,2019,91:104100.
[23] MANSOUR M K.Practical effectiveness-NTU model for cooling and dehumidifying coil with non-unit Lewis factor[J].Applied thermal engineering,2016,100:1111- 1118.
[24] 杨同球.用湿球温度法计算表冷器湿工况[J].制冷学报，1979(2):30- 41.
[25] 薛殿华，张永涛.关于表冷器热工计算原理的探讨[J].制冷学报，1983(2):43- 52.
[26] 张永涛，薛殿华.用焓效率法计算表冷器的湿工况[J].制冷学报，1984(4):33- 42.
[27] 王晋生.水冷式表冷器传热研究(1):用干湿转换法计算湿工况[J].暖通空调，2000,30(4):78- 80.
[28] 凌飞，杨春节.适用于湿工况的风机盘管简化换热模型[J].暖通空调，2012,42(9):105- 109.
[29] 白梦梦，王沣浩，王志华，等.中温水空调系统风机盘管的性能研究[J].制冷学报，2019,40(3):52- 59.
[30] 周广，周孝清，何石泉.表冷器湿工况传热性能的简化预测方法[J].暖通空调，2019,49(8):120- 126.
[31] 赵荣义，范存养，薛殿华，等.空气调节[M].4版.北京：中国建筑工业出版社，2008:82.
Modification method of heat transfer model for fan-coil units in air conditioning systems
Abstract: Based on the performance test data of fan-coil unit samples provided by the equipment manufacturers, the heat transfer model of the fan-coil unit is established, including the heat transfer coefficient model, total heat exchange efficiency model and general heat exchange efficiency model. The heat transfer model is verified, the modified correlation of the model is put forward, and the modified and unmodified models are compared. The results show that the error of the total heat exchange efficiency model is mainly due to the pure countercurrent assumption in the fan-coil unit's heat transfer process, and the model's correction coefficient is mainly related to the air volume. Before the correction of the model, the model error of total heat exchange efficiency is 8.9% to 21.8%, the error of calculated value of total heat model is 12.0% to 22.0%, the error of sensible heat is 8.3% to 12.6%, the error of outlet water temperature is 5.0% to 8.5%, and the error of outlet air temperature is 6.6% to 10.8%. After the modification of the model, the model accuracy and prediction accuracy have been greatly improved, the model error of total heat exchange efficiency is less than 3.3%, the error of total heat model calculation is less than 7.1%, the sensible heat error is less than 2.9%, the outlet water temperature error is less than 3.3%, and the outlet air temperature error is less than 2.5%. The fan-coil heat transfer model simplifies the demand parameters and significantly improves the model accuracy, and can be used for fan-coil performance evaluation and system optimization control.
Keywords: air conditioning system; fan-coil unit; heat transfer model; heat transfer coefficient; heat transfer efficiency; total heat exchange efficiency; model modification;
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