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Energy Efficiency Indicators for Water Pumping Systems in Multifamily Buildings

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  • Danilo Ferreira de Souza

    (Department of Electrical Engineering, Campus Cuiaba, Federal University of Mato Grosso, Cuiabá 78060-900, Brazil
    Institute of Energy and Environment—IEE, University of Sao Paulo—USP, São Paulo 05508-010, Brazil)

  • Emeli Lalesca Aparecida da Guarda

    (Environment Comfort Laboratory, Federal University of Santa Catarina, Florianopolis 88040-900, Brazil)

  • Ildo Luis Sauer

    (Institute of Energy and Environment—IEE, University of Sao Paulo—USP, São Paulo 05508-010, Brazil)

  • Hédio Tatizawa

    (Institute of Energy and Environment—IEE, University of Sao Paulo—USP, São Paulo 05508-010, Brazil)

Abstract

With the current concerns about sustainable development and energy consumption in buildings, water pumping systems have become essential for reducing energy consumption. This research aims to develop guidelines for the energy assessment of water pumping systems in multifamily buildings. The methodological procedures are: (i) definition of the efficiencies of electric motors; (ii) definition of pump efficiency levels; (iii) determination of energy consumption; and (iv) construction of the efficiency scale and guidelines for projects and assessments. The results obtained were that centrifugal pumps with 40% efficiency have higher energy consumption, regardless of the efficiency class of the electric motors, showing a 20% increase in electrical energy consumption. Lower efficiencies directly impact the energy efficiency rating of the water pumping system. Thus the 40% efficiency obtained energy efficiency rating “Very Low—VL” for all motor efficiency classes (between IE1 and IE5). At 60% efficiency, the energy efficiency level of the system was “Average—A”, gradually increasing to “Very High—VH”, as the energy consumption in the pumps decreased and the motors’ energy efficiency classes increased. It is concluded that designers and professionals in the area must consider the efficiency of the pumps, as they play a fundamental role in the classification of the system’s energy efficiency. It is also recommended to verify the energy efficiency of the water pumping system and implement design guidelines so that the pumping system achieves lower energy consumption, contributing to the building’s energy efficiency and sustainability.

Suggested Citation

  • Danilo Ferreira de Souza & Emeli Lalesca Aparecida da Guarda & Ildo Luis Sauer & Hédio Tatizawa, 2021. "Energy Efficiency Indicators for Water Pumping Systems in Multifamily Buildings," Energies, MDPI, vol. 14(21), pages 1-13, November.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:21:p:7152-:d:669828
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    References listed on IDEAS

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    Cited by:

    1. Seif Khiati & Rafik Belarbi & Ammar Yahia, 2023. "Sustainable Buildings: A Choice, or a Must for Our Future?," Energies, MDPI, vol. 16(6), pages 1-5, March.
    2. Manickavel Baranidharan & Rassiah Raja Singh, 2022. "AI Energy Optimal Strategy on Variable Speed Drives for Multi-Parallel Aqua Pumping System," Energies, MDPI, vol. 15(12), pages 1-29, June.
    3. Danilo Ferreira de Souza & Emeli Lalesca Aparecida da Guarda & Welitom Ttatom Pereira da Silva & Ildo Luis Sauer & Hédio Tatizawa, 2022. "Perspectives on the Advancement of Industry 4.0 Technologies Applied to Water Pumping Systems: Trends in Building Pumps," Energies, MDPI, vol. 15(9), pages 1-17, May.

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