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Comparison of two-prototype near-horizontal Drain Water Heat Recovery units on the basis of effectiveness

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  • Pochwat, Kamil
  • Kordana, Sabina
  • Starzec, Mariusz
  • Słyś, Daniel

Abstract

Recovery of energy carried by greywater is possible, for instance, through application of Drain Water Heat Recovery (DWHR) units at the drain water outlet from a shower unit. This paper reports results of a study concerning assessment of rationale behind the use of two different horizontal DWHR units. The analysis, carried out in laboratory conditions proved that equipping of the unit with properly shaped baffles can significantly increase its effectiveness. The effect was observed for all flow rates and device body bottom slopes adopted for the analysis. The paper points out the effect of difference of temperatures between the preheated water and the greywater giving up the heat. The effect turned out to be small in case of the compared devices. Results presented in the paper are of a practical value and can be used as guidelines for designers and potential investors.

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  • Pochwat, Kamil & Kordana, Sabina & Starzec, Mariusz & Słyś, Daniel, 2019. "Comparison of two-prototype near-horizontal Drain Water Heat Recovery units on the basis of effectiveness," Energy, Elsevier, vol. 173(C), pages 1196-1207.
    • Handle: RePEc:eee:energy:v:173:y:2019:i:c:p:1196-1207
    DOI: 10.1016/j.energy.2019.02.113
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    Cited by:

    1. Østergaard, Dorte Skaarup & Smith, Kevin Michael & Tunzi, Michele & Svendsen, Svend, 2022. "Low-temperature operation of heating systems to enable 4th generation district heating: A review," Energy, Elsevier, vol. 248(C).
    2. Mahmoud Khaled & Samer Ali & Hassan Jaber & Jalal Faraj & Rabih Murr & Thierry Lemenand, 2022. "Heating/Cooling Fresh Air Using Hot/Cold Exhaust Air of Heating, Ventilating, and Air Conditioning Systems," Energies, MDPI, vol. 15(5), pages 1-11, March.
    3. Kamil Pochwat & Sabina Kordana-Obuch & Mariusz Starzec & Beata Piotrowska, 2020. "Financial Analysis of the Use of Two Horizontal Drain Water Heat Recovery Units," Energies, MDPI, vol. 13(16), pages 1-18, August.
    4. Xiaowei Ma & Mei Wang & Chuandong Li, 2019. "A Summary on Research of Household Energy Consumption: A Bibliometric Analysis," Sustainability, MDPI, vol. 12(1), pages 1-17, December.

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