不同外绕盘管结构热泵热水器蓄能与用能性能分析

doi:10.16085/j.issn.1000-6613.2020-2206

化工进展 ›› 2021, Vol. 40 ›› Issue (10): 5459-5467.DOI: 10.16085/j.issn.1000-6613.2020-2206

不同外绕盘管结构热泵热水器蓄能与用能性能分析

刘恒¹^,²(), 谭建明¹^,³^,⁴(), 李舒宏²(), 杜明浩², 叶强²

^1.空调设备及系统运行节能国家重点实验室，广东珠海 519070
^2.东南大学能源与环境学院，江苏南京 210096
^3.广东省制冷设备节能环保技术企业重点实验室，广东珠海 519070
^4.珠海格力电器股份有限公司，广东珠海 519070

收稿日期:2020-11-05 修回日期:2020-12-21 出版日期:2021-10-10 发布日期:2021-10-25
通讯作者: 谭建明,李舒宏
作者简介:刘恒（1996—），男，硕士研究生，研究方向为制冷与低温工程。E-mail：18361223079@163.com。
基金资助:
空调设备及系统运行节能国家重点实验室开放基金(ACSKL2019KT10);国家自然科学基金(51876033)

Performance analysis of heat pump water heater with different wrap-around condenser coil structure on the charging and discharging

LIU Heng¹^,²(), TAN Jianming¹^,³^,⁴(), LI Shuhong²(), DU Minghao², YE Qiang²

^1.State Key Laboratory of Air-Conditioning Equipment and System Energy Conservation, Zhuhai 519070, Guangdong, China
^2.School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
^3.Guangdong Key Laboratory of Refrigeration Equipment and Energy Conservation Technology, Zhuhai 519070, Guangdong, China
^4.GREE Electric Appliances, Incorporated of Zhuhai, Zhuhai 519070, Guangdong, China

Received:2020-11-05 Revised:2020-12-21 Online:2021-10-10 Published:2021-10-25
Contact: TAN Jianming,LI Shuhong

摘要/Abstract

摘要：

家用空气源热泵热水器能够高效制取生活热水，优化其冷凝盘管外绕结构设计，可以进一步提高系统运行性能。本文提出了外绕变间距盘管结构形式，通过建立MATLAB热泵模型与水箱CFD模型，联立形成耦合模拟模型，经实验验证耦合模型的准确性后，模拟研究了外绕等/变间距盘管结构对热泵热水器蓄能与用能性能的影响。结果显示，与外绕等间距盘管结构相比，变间距盘管结构蓄能过程中的平均传热系数、性能系数（COP）分别提高了21.91%、10.75%，热水温度分布更加均匀，用能过程中的平均传热系数和COP比等间距盘管稍高，热水输出率、释能效率分别提高了7.69%、8.53%，水箱输出的热水温度品质得到改善。本文为对冷凝盘管外绕形式的优化设计提供了方向和指导。

关键词: 热泵热水器, 耦合模拟, 热水输出率, 等/变间距盘管, 蓄能/用能

Abstract:

The domestic air source heat pump water heater (HPWH) can efficiently produce hot water, and the optimization of the design of the wrap-around condenser coil structure can further improve the system performance. In this paper, the structure of the wrap-around variable-pitch condenser coil was proposed. The coupling model was formed by combining a MATLAB heat pump model with a CFD model of the water tank. The accuracy of the model was verified by experiments after it was simultaneously formed. The influence of wrap-around variable/constant-pitch condenser coil structure on the performance of heat pump water heater during charging and discharging was simulated and studied. The results showed that the average heat transfer coefficient and the COP of the wrap-around variable-pitch condenser coil structure on charging increased by 21.91% and 10.75%, respectively, compared with the wrap-around constant-pitch condenser coil structure. The hot water temperature distribution was more uniform. The average heat transfer coefficient and the COP of the wrap-around variable-pitch condenser coil structure on discharging were slightly higher than that of the wrap-around constant-pitch condenser coil structure The hot water extraction efficiency and heat discharging efficiency were increased by 7.69% and 8.53%, respectively. The temperature quality of the hot water discharged from the water tank was improved. This paper provides the direction and guidance for the optimization design of the wrap-around condenser coil structure.

Key words: heat pump water heater, coupling model, extraction efficiency, variable/constant-pitch coil, charging/discharging

中图分类号:

TS914

刘恒, 谭建明, 李舒宏, 杜明浩, 叶强. 不同外绕盘管结构热泵热水器蓄能与用能性能分析[J]. 化工进展, 2021, 40(10): 5459-5467.

LIU Heng, TAN Jianming, LI Shuhong, DU Minghao, YE Qiang. Performance analysis of heat pump water heater with different wrap-around condenser coil structure on the charging and discharging[J]. Chemical Industry and Engineering Progress, 2021, 40(10): 5459-5467.

图/表 14

图1 外绕式等间距与变间距盘管水箱

表1 盘管及水箱主要结构设计参数

部件	结构参数	数值
部件	结构参数	等间距盘管	变间距盘管
冷凝盘管	盘管内径（d_c，i）/m	0.010	0.010
	盘管外径（d_c，o）/m	0.012	0.012
	螺旋间距（h_c）/m	0.01	h_c，i
	螺旋圈数（N）	28	28
	盘管高度（H_c）/m	0.70	0.70
	盘管总长（L_c）/m	35	35
水箱	水箱容积（V_t）/L	150
	水箱直径（D_t）/m	0.40
	水箱高度（H_t）/m	1.20

图2 水箱温度测量示意图

图3 耦合算法

图4 水箱二维模型简化示意图

表2 水箱实验测量的不同运行工况参数

盘管结构	工况	初始水温/℃	环境温度/℃	气象条件
外绕变间距	一	10.30	9~10	晴朗
	二	14.93	4~6	阴雨
	三	20.26	6~7	晴朗

图5 外绕变间距盘管各性能指标实验值与模拟值对比

图6 蓄能过程两种盘管水箱热水温度分布

图7 蓄能过程两种盘管水箱速度分布模拟图

图8 用能过程两种盘管水箱热水温度分布

图9 用能过程两种盘管水箱流函数模拟图

图10 蓄能与用能过程两种外绕盘管传热过程传热系数对比

图11 蓄能与用能过程两种盘管结构下的系统性能系数COP对比

图12 两种盘管结构水箱用能性能对比

参考文献 18

1	WILLEM H, LIN Y, LEKOV A. Review of energy efficiency and system performance of residential heat pump water heaters[J]. Energy and Buildings, 2017, 143: 191-201.
2	CHEN W, LIANG S Q, GUO Y X, et al. Investigation on the thermal performance and optimization of a heat pump water heater assisted by shower waste water[J]. Energy and Buildings, 2013, 64: 172-181.
3	HEPBASLI A, KALINCI Y. A review of heat pump water heating systems[J]. Renewable and Sustainable Energy Reviews, 2009, 13(6/7): 1211-1229.
4	CHUA K J, CHOU S K, YANG W M. Advances in heat pump systems: a review[J]. Applied Energy, 2010, 87(12): 3611-3624.
5	SHEN B, NAWAZ K, BAXTER V, et al. Development and validation of quasi-steady-state heat pump water heater model having stratified water tank and wrapped-tank condenser[J]. International Journal of Refrigeration, 2018, 87: 78-90.
6	PARK C Y, HRNJAK P. Experimental and numerical study on microchannel and round-tube condensers in a R410A residential air-conditioning system[J]. International Journal of Refrigeration, 2008, 31(5): 822-831.
7	王丹丹. 空气源热泵热水器封闭水箱内水的温度场及流场研究[D]. 北京: 北京建筑工程学院，2006.
	WANG Dandan. Research on temperature field and flow field of water in closed water tank of air source heat pump water heater[D]. Beijing: Beijing Institute of Architecture and Engineering, 2006.
8	杨亮, 邵亮亮, 张春路. 外绕微通道冷凝器空气源热泵热水器仿真与优化[J]. 制冷学报, 2014, 35(1): 66-70.
	YANG Liang, SHAO Liangliang, ZHANG Chunlu. Modeling and optimization of air source heat pump water heaters using wrap-around micro-channel condenser[J]. Journal of Refrigeration, 2014, 35(1): 66-70.
9	LI S H, ZHANG Y X, LI Y, et al. Experimental study of inlet structure on the discharging performance of a solar water storage tank[J]. Energy and Buildings, 2014, 70: 490-496.
10	DAI N N, LI S H. Simulation and performance analysis on condenser coil in household heat pump water heater[J]. Sustainable Cities and Society, 2018, 36: 176-184.
11	SHAH T, HRNJAK P. Linked modelling of heat pump water heater vapor compression system and water tank[C]//International Refrigeration and Air Conditioning Conference, 2014.
12	JAYAKUMAR J S, MAHAJANI S M, MANDAL J C, et al. Experimental and CFD estimation of heat transfer in helically coiled heat exchangers[J]. Chemical Engineering Research and Design, 2008, 86(3): 221-232.
13	吕传超, 李瑛, 刘颖, 等. 热泵热水器蓄热水箱的数值模拟与结构优化[J]. 流体机械, 2014, 42(4): 76-80.
	Chuanchao LYU, LI Ying, LIU Ying, et al. Numerical simulation and configuration optimization of a hot water storage tank of heat pump water heater[J]. Fluid Machinery, 2014, 42(4): 76-80.
14	HEGAZY A A. Effect of inlet design on the performance of storage-type domestic electrical water heaters[J]. Applied Energy, 2007, 84(12): 1338-1355.
15	CHOI J W, LEE G, KIM M S. Numerical study on the steady state and transient performance of a multi-type heat pump system[J]. International Journal of Refrigeration, 2011, 34(2): 429-443.
16	CHAMOUN M, RULLIERE R, HABERSCHILL P, et al. Dynamic model of an industrial heat pump using water as refrigerant[J]. International Journal of Refrigeration, 2012, 35(4): 1080-1091.
17	戴楠楠. 不同水箱盘管结构对热泵热水器性能的影响研究[D]. 南京：东南大学，2018.
	DAI Nannan. Research on effect of different condenser coil stucture on heat pump water heater system[D]. Nanjing: Southeast University, 2018.
18	GAO Z, MEI V C, CHEN F C. CFD solution and experimental testing of buoyancy-driven convection caused by condensers immersed in a water tank of HPWH[C]//Proceedings of ASME 2003 International Mechanical Engineering Congress and Exposition, November 15-21, 2003, Washington D C, USA. 2008: 33-38.

不同外绕盘管结构热泵热水器蓄能与用能性能分析

Performance analysis of heat pump water heater with different wrap-around condenser coil structure on the charging and discharging

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