Performance evaluation of a wrapped around condenser for heat pump water heater applications

Rendall, Joe D.; Nawaz, Kashif; Elatar, Ahmed F.; Asher, Will; Worek, William

doi:10.1016/j.applthermaleng.2022.118097

Title: Performance evaluation of a wrapped around condenser for heat pump water heater applications

Journal Article · 29 January 2022 · Applied Thermal Engineering

DOI: https://doi.org/10.1016/j.applthermaleng.2022.118097 · OSTI ID:1844905

^[1];

^[2]; Worek, William ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Gas Technology Instituts, Des Plaines, IL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Texas A & M Univ. at Kingsville, TX (United States)

In this report, accurate performance evaluation of a wrapped-around condenser for heat pump water heaters (WHPWH) is critical since the COP of the system depends heavily on thermal stratification and condenser design. An analytical, quasi-steady state heat balance method has been developed to determine the optimal spacing between adjacent channels, tube diameter, tube shape, and total refrigerant charge amount for the condenser. The heat transfer rate is compared among three approaches: the refrigerant thermodynamic model, the condenser-wrap fin model, and the analytical natural convection model on the inside of the tank for the three regions based on the refrigerant phase (e.g., super-heated, saturated, or subcooled). The heat transfer rate was predicted by a combination of slug-plug and annular flow for a D-shaped helical tube. Experimental data were used as boundary conditions for validating the model. The rate of heat transfer based on tube shape and tank wall temperatures was compared by CFD analysis. Parametric analysis indicates a tradeoff between refrigerant mass, pressure drop, tube diameter, and tube length to maximize the heat transfer rate. The model suggests the saturated region length can be extended by 400%, and the condenser pressure drop can be reduced by 23% with an optimal spacing pattern.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-06CH11357; AC05-00OR22725

OSTI ID:: 1844905

Journal Information:: Applied Thermal Engineering, Journal Name: Applied Thermal Engineering Journal Issue: 1 Vol. 207; ISSN 1359-4311

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (26)

A void fraction model for annular two-phase flow Tandon, T. N.; Varma, H. K.; Gupta, C. P. International Journal of Heat and Mass Transfer, Vol. 28, Issue 1 https://doi.org/10.1016/0017-9310(85)90021-3	journal	January 1985
Advances in heat pump systems: A review Chua, K. J.; Chou, S. K.; Yang, W. M. Applied Energy, Vol. 87, Issue 12 https://doi.org/10.1016/j.apenergy.2010.06.014	journal	December 2010
System optimization and experimental research on air source heat pump water heater Zhang, J.; Wang, R. Z.; Wu, J. Y. Applied Thermal Engineering, Vol. 27, Issue 5-6 https://doi.org/10.1016/j.applthermaleng.2006.07.031	journal	April 2007
Energy consumption modeling of air source electric heat pump water heaters Bourke, Grant; Bansal, Pradeep Applied Thermal Engineering, Vol. 30, Issue 13 https://doi.org/10.1016/j.applthermaleng.2010.04.008	journal	September 2010
A study on characteristics of thermal storage tank for varying thermal load in multi-use heat pump water heater Nam, Hyunkyu; Bai, Cheolho; Sim, Jaesool Applied Thermal Engineering, Vol. 66, Issue 1-2 https://doi.org/10.1016/j.applthermaleng.2014.02.009	journal	May 2014
Experimental analysis of an air-source transcritical CO2 heat pump water heater using the hot gas bypass defrosting method Hu, Bin; Wang, Xiaolin; Cao, Feng Applied Thermal Engineering, Vol. 71, Issue 1 https://doi.org/10.1016/j.applthermaleng.2014.07.017	journal	October 2014
Performance comparison of air-source heat pump water heater with different expansion devices Peng, Jing-Wei; Li, Hui; Zhang, Chun-Lu Applied Thermal Engineering, Vol. 99 https://doi.org/10.1016/j.applthermaleng.2016.01.113	journal	April 2016
Study of multi-twisted-tube gas cooler for CO2 heat pump water heaters Yang, Yingying; Li, Minxia; Wang, Kaiyang Applied Thermal Engineering, Vol. 102 https://doi.org/10.1016/j.applthermaleng.2016.03.123	journal	June 2016
Experimental study of a control strategy for a cascade air source heat pump water heater Qu, Minglu; Fan, Yanan; Chen, Jianbo Applied Thermal Engineering, Vol. 110 https://doi.org/10.1016/j.applthermaleng.2016.08.176	journal	January 2017
Experimental performance study on a dual-mode CO2 heat pump system with thermal storage Liu, Fang; Zhu, Weiquan; Cai, Yang Applied Thermal Engineering, Vol. 115 https://doi.org/10.1016/j.applthermaleng.2016.12.095	journal	March 2017
Performance assessment of heat pump water heaters with R1233zd(E)/HCs binary mixtures Ju, Fujun; Fan, Xiaowei; Chen, Yaping Applied Thermal Engineering, Vol. 123 https://doi.org/10.1016/j.applthermaleng.2017.05.137	journal	August 2017
R290 (propane) and R600a (isobutane) as natural refrigerants for residential heat pump water heaters Nawaz, Kashif; Shen, Bo; Elatar, Ahmed Applied Thermal Engineering, Vol. 127 https://doi.org/10.1016/j.applthermaleng.2017.08.080	journal	December 2017
Heat transfer characteristics of an expanded graphite/paraffin PCM-heat exchanger used in an instantaneous heat pump water heater Wu, Jianghong; Feng, Ye; Liu, Chaopeng Applied Thermal Engineering, Vol. 142 https://doi.org/10.1016/j.applthermaleng.2018.06.087	journal	September 2018
Dynamic simulation of an air-source heat pump water heater using novel modified evaporator model Chen, Jiaheng; Yu, Jianlin Applied Thermal Engineering, Vol. 144 https://doi.org/10.1016/j.applthermaleng.2018.08.085	journal	November 2018
Studies on the online intelligent diagnosis method of undercharging sub-health air source heat pump water heater Sun, Zhe; Jin, Huaqiang; Gu, Jiangping Applied Thermal Engineering, Vol. 169 https://doi.org/10.1016/j.applthermaleng.2020.114957	journal	March 2020
Analytical and numerical sizing of phase change material thickness for rectangular encapsulations in hybrid thermal storage tanks for residential heat pump systems Hirmiz, R.; Teamah, H. M.; Lightstone, M. F. Applied Thermal Engineering, Vol. 170 https://doi.org/10.1016/j.applthermaleng.2020.114978	journal	April 2020
Performance assessment of optimized heat pump water heaters using low-GWP refrigerants for high- and low-temperature applications Kim, Byeongsu; Lee, DongChan; Lee, Sang Hun Applied Thermal Engineering, Vol. 181 https://doi.org/10.1016/j.applthermaleng.2020.115954	journal	November 2020
A thermodynamic analysis of a transcritical cycle with refrigerant mixture R32/R290 for a small heat pump water heater Yu, Jianlin; Xu, Zong; Tian, Gaolei Energy and Buildings, Vol. 42, Issue 12 https://doi.org/10.1016/j.enbuild.2010.08.016	journal	December 2010
Effect of heat transfer area and refrigerant mass flux in a gas cooler on heating performance of air-source transcritical CO2 heat pump water heater system Wang, Shouguo; He, Yongning; Tuo, Hanfei Energy and Buildings, Vol. 67 https://doi.org/10.1016/j.enbuild.2013.07.078	journal	December 2013
Refrigerant charge optimisation for propane heat pump water heaters Ghoubali, Redouane; Byrne, Paul; Bazantay, Frédéric International Journal of Refrigeration, Vol. 76 https://doi.org/10.1016/j.ijrefrig.2017.02.017	journal	April 2017
R1234yf and R1234ze(E) as low-GWP refrigerants for residential heat pump water heaters Nawaz, Kashif; Shen, Bo; Elatar, Ahmed International Journal of Refrigeration, Vol. 82 https://doi.org/10.1016/j.ijrefrig.2017.06.031	journal	October 2017
Performance optimization of CO2 heat pump water heater Nawaz, Kashif; Shen, Bo; Elatar, Ahmed International Journal of Refrigeration, Vol. 85 https://doi.org/10.1016/j.ijrefrig.2017.09.027	journal	January 2018
Experimentally validated model of heat pump water heater with a water tank in heating-up transients Li, Wenzhe; Hrnjak, Pega International Journal of Refrigeration, Vol. 88 https://doi.org/10.1016/j.ijrefrig.2018.01.020	journal	April 2018
Seasonal performance rating of heat pump water heaters Morrison, G. L.; Anderson, T.; Behnia, M. Solar Energy, Vol. 76, Issue 1-3 https://doi.org/10.1016/j.solener.2003.08.007	journal	January 2004
Heat transfer in horizontal plug and slug flow for gas-liquid and gas-slurry systems. Kago, Tokihiro; Saruwatari, Tetsuya; Kashima, Makoto JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, Vol. 19, Issue 2 https://doi.org/10.1252/jcej.19.125	journal	January 1986
Performance evaluation and validation of a novel heat pump water heater with rotary compressor and D-shaped condenser coils. C., Shi; P., Hrnjak International Institute of Refrigeration (IIR) https://doi.org/10.18462/iir.icr.2019.0584	dataset	January 2019

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42 ENGINEERING
Analytical model
Heat pump
Water heater
Wrapped condenser
analytical model
heat pump
water heater
wrapped condenser

Title: Performance evaluation of a wrapped around condenser for heat pump water heater applications

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