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Air source thermoelectric heat pump for simultaneous cold air delivery and hot water supply: Full modeling and performance evaluation

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  • Cai, Yang
  • Zhang, Dong-Dong
  • Liu, Di
  • Zhao, Fu-Yun
  • Wang, Han-Qing

Abstract

An air-source thermoelectric heat pump (AS-THP) system is proposed in the present work, and it actively exploits ambient air source energy serving for cold air delivery and hot water supply simultaneously. A mathematical model, combining thermoelectric theory and the effectiveness-number of transfer units (ε-NTU), is firstly conducted to predict the performance of AS-THP system. Subsequently, the effects of thermoelectric input current, inlet air/water temperatures, thermal conductance, mass flow rate in both cold and hot sides, and the number of thermoelectric coolers on the performance of AS-THP system are sensitively investigated. Modeling results demonstrate that the thermal conductance and specific heat allocations in heat exchanger hot and cold sides could put heavy effects on the total cooling capacity (Qc,all), coefficient of performance (COP), outlet water temperature (Tc,out) and outlet air temperature (Th,out). Further modeling on the thermal parameters in both sides has shown that overall efficiency of AS-THP system could be achieved to nearly 90%. Also, with the increase of unit number, the cooling load for each thermoelectric unit would be reduced while the input power increases inversely. Present research could be beneficial for extensive utilization of thermoelectric heat pump in daily life by the use of ambient air source energy.

Suggested Citation

  • Cai, Yang & Zhang, Dong-Dong & Liu, Di & Zhao, Fu-Yun & Wang, Han-Qing, 2019. "Air source thermoelectric heat pump for simultaneous cold air delivery and hot water supply: Full modeling and performance evaluation," Renewable Energy, Elsevier, vol. 130(C), pages 968-981.
    • Handle: RePEc:eee:renene:v:130:y:2019:i:c:p:968-981
    DOI: 10.1016/j.renene.2018.07.007
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    References listed on IDEAS

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    Cited by:

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    2. Xiao, Biao & Chang, Huawei & He, Lin & Zhao, Shunan & Shu, Shuiming, 2020. "Annual performance analysis of an air source heat pump water heater using a new eco-friendly refrigerant mixture as an alternative to R134a," Renewable Energy, Elsevier, vol. 147(P1), pages 2013-2023.
    3. Cai, Yang & Hong, Bing-Hua & Wu, Wei-Xiong & Wang, Wei-Wei & Zhao, Fu-Yun, 2022. "Active cooling performance of a PCM-based thermoelectric device: Dynamic characteristics and parametric investigations," Energy, Elsevier, vol. 254(PB).
    4. Cai, Yang & Wang, Lei & Ding, Wen-Tao & Liu, Di & Zhao, Fu-Yun, 2019. "Thermal performance of an active thermoelectric ventilation system applied for built space cooling: Network model and finite time thermodynamic optimization," Energy, Elsevier, vol. 170(C), pages 915-930.
    5. Guozhong Zheng & Wentao Bu, 2018. "Review of Heating Methods for Rural Houses in China," Energies, MDPI, vol. 11(12), pages 1-18, December.
    6. Cai, Yang & Wang, Wei-Wei & Liu, Cheng-Wei & Ding, Wen-Tao & Liu, Di & Zhao, Fu-Yun, 2020. "Performance evaluation of a thermoelectric ventilation system driven by the concentrated photovoltaic thermoelectric generators for green building operations," Renewable Energy, Elsevier, vol. 147(P1), pages 1565-1583.
    7. Karami Rad, Meysam & Rezania, Alireza & Omid, Mahmoud & Rajabipour, Ali & Rosendahl, Lasse, 2019. "Study on material properties effect for maximization of thermoelectric power generation," Renewable Energy, Elsevier, vol. 138(C), pages 236-242.
    8. Duan, Mengfan & Sun, Hongli & Lin, Borong & Wu, Yifan, 2021. "Evaluation on the applicability of thermoelectric air cooling systems for buildings with thermoelectric material optimization," Energy, Elsevier, vol. 221(C).
    9. Tian, Xiao-Xiao & Asaadi, Soheil & Moria, Hazim & Kaood, Amr & Pourhedayat, Samira & Jermsittiparsert, Kittisak, 2020. "Proposing tube-bundle arrangement of tubular thermoelectric module as a novel air cooler," Energy, Elsevier, vol. 208(C).

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