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Investigating the Impact of Plumbing Configuration on Energy Savings for Falling-Film Drain Water Heat Recovery Systems

Author

Listed:
  • Ramin Manouchehri

    (Solar Thermal Research Laboratory, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada)

  • Michael R. Collins

    (Solar Thermal Research Laboratory, Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada)

Abstract

Falling-film drain water heat recovery (DWHR) systems are heat exchangers utilized in residential buildings for recovering energy from greywater. A recent publication by the authors contained a validated model that can be used to predict the performance of DWHR heat exchangers under variable flowrates and temperatures, and this work shows the implementation of the model into Transient System Simulation Tool (TRNSYS) software to perform energy simulations. This work aims to show the different plumbing configurations in which DWHR heat exchangers could be installed, and to simulate their performance under various conditions. The results show that plumbing configuration has a significant impact on energy savings expected from DWHR heat exchangers, and maximum savings are achieved in equal-flow configuration. However, other plumbing configurations provide significant savings, and the mains temperature could dictate which configuration provides higher energy savings.

Suggested Citation

  • Ramin Manouchehri & Michael R. Collins, 2022. "Investigating the Impact of Plumbing Configuration on Energy Savings for Falling-Film Drain Water Heat Recovery Systems," Energies, MDPI, vol. 15(3), pages 1-13, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:1141-:d:741703
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    Citations

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    Cited by:

    1. Krzysztof Rajski & Jan Danielewicz, 2023. "Heat Transfer and Heat Recovery Systems," Energies, MDPI, vol. 16(7), pages 1-6, April.
    2. Sabina Kordana-Obuch & Mariusz Starzec, 2022. "Horizontal Shower Heat Exchanger as an Effective Domestic Hot Water Heating Alternative," Energies, MDPI, vol. 15(13), pages 1-22, July.
    3. Sabina Kordana-Obuch & Mariusz Starzec & Michał Wojtoń & Daniel Słyś, 2023. "Greywater as a Future Sustainable Energy and Water Source: Bibliometric Mapping of Current Knowledge and Strategies," Energies, MDPI, vol. 16(2), pages 1-34, January.
    4. Beata Piotrowska & Daniel Słyś, 2022. "Comprehensive Analysis of the State of Technology in the Field of Waste Heat Recovery from Grey Water," Energies, MDPI, vol. 16(1), pages 1-20, December.

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