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Air source heat pump water heater: Dynamic modeling, optimal energy management and mini-tubes condensers

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  • Ibrahim, Oussama
  • Fardoun, Farouk
  • Younes, Rafic
  • Louahlia-Gualous, Hasna

Abstract

This paper presents a dynamic simulation model to predict the performance of an ASHPWH (air source heat pump water heater). The developed model is used to assess its performance in the Lebanese context. It is shown that for the four Lebanese climatic zones, the expected monthly values of the average COP (coefficient of performance) varies from 2.9 to 5, leading to high efficiencies compared with conventional electric water heaters. The energy savings and GHG (greenhouse gas) emissions reduction are investigated for each zone. Furthermore, it is recommended to use the ASHPWH during the period of highest daily ambient temperatures (noon or afternoon), assuming that the electricity tariff and hot water loads are constant. In addition, an optimal management model for the ASHPWH is developed and applied for a typical winter day of Beirut. Moreover, the developed dynamic model of ASHPWH is used to compare the performance of three similar systems that differ only with the condenser geometry, where results show that using mini-condenser geometries increase the COP (coefficient of performance) and consequently, more energy is saved as well as more GHG emissions are reduced. In addition, the condenser “surface compactness” is increased giving rise to an efficient compact heat exchanger.

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  • Ibrahim, Oussama & Fardoun, Farouk & Younes, Rafic & Louahlia-Gualous, Hasna, 2014. "Air source heat pump water heater: Dynamic modeling, optimal energy management and mini-tubes condensers," Energy, Elsevier, vol. 64(C), pages 1102-1116.
    • Handle: RePEc:eee:energy:v:64:y:2014:i:c:p:1102-1116
    DOI: 10.1016/j.energy.2013.11.017
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    8. Yingfeng Xiang & Mingwen Shi & Chuanzhen Li & Chao Zhu & Yifan Cao & Yangda Chen & Weijun Wu & Yapeng Li & Xuxin Guo & Xianpeng Sun, 2022. "Active Air-Source Heat Storage and Release System for Solar Greenhouses: Design and Performance," Energies, MDPI, vol. 16(1), pages 1-13, December.
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    10. Roberto Barrella & Irene Priego & José Ignacio Linares & Eva Arenas & José Carlos Romero & Efraim Centeno, 2020. "Feasibility Study of a Centralised Electrically Driven Air Source Heat Pump Water Heater to Face Energy Poverty in Block Dwellings in Madrid (Spain)," Energies, MDPI, vol. 13(11), pages 1-23, May.
    11. Han, Gwangwoo & Joo, Hong-Jin & Lim, Hee-Won & An, Young-Sub & Lee, Wang-Je & Lee, Kyoung-Ho, 2023. "Data-driven heat pump operation strategy using rainbow deep reinforcement learning for significant reduction of electricity cost," Energy, Elsevier, vol. 270(C).
    12. Cui, Haijiao & Li, Nianping & Peng, Jinqing & Cheng, Jianlin & Li, Shengbing, 2016. "Study on the dynamic and thermal performances of a reversibly used cooling tower with upward spraying," Energy, Elsevier, vol. 96(C), pages 268-277.
    13. Abbasi, Bardia & Li, Simon & Mwesigye, Aggrey, 2024. "Energy, exergy, economic, and environmental (4E) analysis of SAHP water heaters in very cold climatic conditions," Renewable Energy, Elsevier, vol. 226(C).
    14. Youxin Zhou & Bin Peng & Bingguo Zhu, 2023. "Assessment of Optimal Operating Range and Case Verification of a Waste Heat Air-Source Heat Pump Water Heater Based on a Semiempirical Parametric Model," Energies, MDPI, vol. 16(5), pages 1-16, February.
    15. Jia, Jie & Lee, W.L. & Cheng, Yuanda & Tian, Qi, 2021. "Can reversible room air-conditioner be used for combined space and domestic hot water heating in subtropical dwellings? Techno-economic evidence from Hong Kong," Energy, Elsevier, vol. 223(C).
    16. Guo, Xiaofeng & Goumba, Alain Pascal, 2018. "Air source heat pump for domestic hot water supply: Performance comparison between individual and building scale installations," Energy, Elsevier, vol. 164(C), pages 794-802.
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