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Optimal design and operation of a central domestic hot water heat pump system for a group of dwellings employing low temperature waste heat as a source

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  • Hervás-Blasco, Estefanía
  • Navarro-Peris, Emilio
  • Corberán, José Miguel

Abstract

In this work, a study of an energy recovery system from a low-grade temperature source based on heat pumps for domestic hot water is done. The main components of the system are a pre-heating heat exchanger, an optimized heat pump for domestic hot water production, and a variable-volume storage tank. A model has been developed in TRNSYS to analyse the best configuration and control strategy of the system in order to satisfy the profile demands of 10, 20, and 30 multifamily houses, which are considered as a representative target market for this type of application. From this analysis, the influence of the design/sizing parameters on the system CO2 emissions has been obtained and a design criterium for their minimization has been supplied. Finally, a sensitivity analysis based on different net and heat source temperatures has been done in order to estimate the generalizability of the proposed solution. The obtained results show that this kind of system, with the proper design, sizing, and operation, offers potential CO2 emissions reductions by a factor of almost five compared to a conventional gas boiler system but a bad system selection could reduce this potential benefit up to 25%.

Suggested Citation

  • Hervás-Blasco, Estefanía & Navarro-Peris, Emilio & Corberán, José Miguel, 2019. "Optimal design and operation of a central domestic hot water heat pump system for a group of dwellings employing low temperature waste heat as a source," Energy, Elsevier, vol. 188(C).
    • Handle: RePEc:eee:energy:v:188:y:2019:i:c:s0360544219316731
    DOI: 10.1016/j.energy.2019.115979
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    References listed on IDEAS

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    1. Pitarch, Miquel & Navarro-Peris, Emilio & Gonzálvez-Maciá, José & Corberán, José M., 2017. "Evaluation of different heat pump systems for sanitary hot water production using natural refrigerants," Applied Energy, Elsevier, vol. 190(C), pages 911-919.
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    1. Vering, Christian & Maier, Laura & Breuer, Katharina & Krützfeldt, Hannah & Streblow, Rita & Müller, Dirk, 2022. "Evaluating heat pump system design methods towards a sustainable heat supply in residential buildings," Applied Energy, Elsevier, vol. 308(C).
    2. Masip, X. & Fuster-Palop, Enrique & Prades-Gil, C. & Viana-Fons, Joan D. & Payá, Jorge & Navarro-Peris, Emilio, 2023. "Case study of electric and DHW energy communities in a Mediterranean district," Renewable and Sustainable Energy Reviews, Elsevier, vol. 178(C).
    3. Zhang, Dongwei & Gao, Zhao & Fang, Chenglei & Shen, Chao & Li, Hang & Qin, Xiang, 2022. "Simulation and analysis of hot water system with comprehensive utilization of solar energy and wastewater heat," Energy, Elsevier, vol. 253(C).
    4. PELELLA, Francesco & ZSEMBINSZKI, Gabriel & VISCITO, Luca & William MAURO, Alfonso & CABEZA, Luisa F., 2023. "Thermo-economic optimization of a multi-source (air/sun/ground) residential heat pump with a water/PCM thermal storage," Applied Energy, Elsevier, vol. 331(C).
    5. Ximo Masip & Emilio Navarro-Peris & José M. Corberán, 2020. "Influence of the Thermal Energy Storage Strategy on the Performance of a Booster Heat Pump for Domestic Hot Water Production System Based on the Use of Low Temperature Heat Source," Energies, MDPI, vol. 13(24), pages 1-24, December.

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