A new type of microchannel condenser applied in the air source heat pump water heater (ASHPWH) with cyclic heating was proposed in this study. The operating performance of the ASHPWH was first tested. Then,the structure of the microchannel condenser was optimized with the implement of vortex generators. Finally, a numerical model of the ASHPWH was established and the optimized microchannel condenser was studied. The experimental results showed that the average coefficient of performance (COP) of the 1 HP (735 W) ASHPWH reached 3.48. In addition, the optimized microchannel condenser could be matched with a 3 HP (2 430 W) ASHPWH with an average heating capacity of 10.30 kW, and achieving an average COP of 4.24, 14.6% higher than the limit value in the national standard.
LI Fan(李凡), LU Gaofeng(陆高锋), DING Yunxiao(丁云霄), ZHENG Chunyuan(郑春元), LI Bin(李斌), ZHAI Xiaoqiang(翟晓强)
. Performance and Optimization of Air Source Heat Pump Water Heater with Cyclic Heating[J]. Journal of Shanghai Jiaotong University(Science), 2024
, 29(2)
: 179
-187
.
DOI: 10.1007/s12204-022-2500-z
[1] WANG Y, YOU S J, SUN Y K, et al. Performance test investigation and operational evaluation of air source heat pump water heater [J]. Fluid Machinery, 2017, 45(10): 77-82 (in Chinese).
[2] YUAN Z Y, TAO L R, YU Z Y. Effect of initial water temperature on the performance of air-source heat pump water heater system [J]. Journal of Refrigeration, 2017, 38(6): 73-79 (in Chinese).
[3] XU Y J, HUANG Y G, JIANG N, et al. Experimental and theoretical study on an air-source heat pump water heater for Northern China in cold winter: Effects of environment temperature and switch of operating modes [J]. Energy and Buildings, 2019, 191: 164-173.
[4] QIU J Y, ZHANG H, SHENG J, et al. Experimental investigation of L41b as replacement for R410A in a residential air-source heat pump water heater [J]. Energy and Buildings, 2019, 199: 190-196.
[5] YANG L, SHAO L L, ZHANG C L. 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 (in Chinese).
[6] SUN C L. Simulation and experiment on the character of R290 applied in air source heat pump water heater [D]. Nanjing: Nanjing University of Science and Technology, 2016 (in Chinese).
[7] CHEN J H, YU J L. Dynamic simulation of an airsource heat pump water heater using novel modified evaporator model [J]. Applied Thermal Engineering, 2018, 144: 469-478.
[8] YANG Y A, LI R S, ZHU Y Q, et al. Experimental and simulation study of air source heat pump for residential applications in Northern China [J]. Energy and Buildings, 2020, 224: 110278.
[9] LOPEZ-BELCHI A, ILLAN-GOMEZ F. Evaluation of a condenser based on mini-channels technology working with R410A and R32. Experimental data and performance estimate [J]. Applied Energy, 2017, 202: 112-124.
[10] RAHMAN M M, KARIYA K, MIYARA A. An experimental study and development of new correlation for condensation heat transfer coefficient of refrigerant inside a multiport minichannel with and without fins [J]. International Journal of Heat and Mass Transfer, 2018, 116: 50-60.
[11] State Administration for Market Regulation. Heat pump water heater for household and similar application: GB/T 23137—2020 [S]. Beijing: China Standards Press, 2020 (in Chinese).
[12] MOFFAT R J. Describing the uncertainties in experimental results [J]. Experimental Thermal and Fluid Science, 1988, 1(1): 3-17.
[13] BERGMAN T L, LAVINE A S, INCROPERA F P, et al. Fundamentals of heat and mass transfer [M]. 17 ed. Hoboken: John Wiley & Sons, 2011.
[14] YANG C Y, WEBB R L. Condensation of R-12 in small hydraulic diameter extruded aluminum tubes with and without micro-fins [J]. International Journal of Heat and Mass Transfer, 1996, 39(4): 791-800.
[15] YANG C Y, WEBB R L. Friction pressure drop of R-12 in small hydraulic diameter extruded aluminum tubes with and without micro-fins [J]. International Journal of Heat and Mass Transfer, 1996, 39(4): 801-809.
[16] LIANG G, ISLAM M D, KHAROUA N, et al. Numerical study of heat transfer and flow behavior in a circular tube fitted with varying arrays of winglet vortex generators [J]. International Journal of Thermal Sciences, 2018, 134: 54-65.
[17] WANG H, TOUBER S. Distributed and non-steadystate modelling of an air cooler [J]. International Journal of Refrigeration, 1991, 14(2): 98-111.
[18] WEBB R L, ERMIS K. Effect of hydraulic diameter on condensation of R-134A in flat, extruded aluminum tubes [J]. Journal of Enhanced Heat Transfer, 2001, 8(2): 77-90.
[19] LI W, TAO W, KANG H, et al. Experimental study on heat transfer and pressure drop characteristics for finand-tube heat exchangers [J]. Chinese Journal of Mechanical Engineering, 1997, 33(1): 81-86 (in Chinese).
[20] ZHANG C L. Simulation principle and technology of refrigeration and air conditioning system [M]. Beijing: Chemical Industry Press, 2013 (in Chinese).
