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Solar water heating technical-economic potential in the household sector in Brazil

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  • Cruz, Talita
  • Schaeffer, Roberto
  • Lucena, André F.P.
  • Melo, Sérgio
  • Dutra, Ricardo

Abstract

Solar energy is a promising source for water heating in the household sector in Brazil. However, despite its large potential, its use is still limited in the country. This study explores the technical-economic potential of Solar Water Heating (SWH) systems in the household sector in Brazil, dividing the country in different climate zones and using a variety of parameters and site-specific conditions. The analysis considers several parameters from household electricity consumers to assess their willingness to install a SWH system in their homes. The model proposed is based on a parametric tool and is supported by the RETScreen model. A Geographical Information System (GIS) is used for spatial analysis. Results indicate the best sites to implement SWH systems in Brazil, as well as their technical-economic potential until 2050. The analysis shows that SWH systems are economically feasible for 17.9% of considered cases by 2020, leading to savings of up to 15.54 TWh/yr. Despite not having the best solar resources, the South region of the country has the best sites while the Southeast region has the best economic potential. Family size, equipment installation costs and energy costs play major roles in the economic feasibility of SWH systems deployment in Brazil.

Suggested Citation

  • Cruz, Talita & Schaeffer, Roberto & Lucena, André F.P. & Melo, Sérgio & Dutra, Ricardo, 2020. "Solar water heating technical-economic potential in the household sector in Brazil," Renewable Energy, Elsevier, vol. 146(C), pages 1618-1639.
    • Handle: RePEc:eee:renene:v:146:y:2020:i:c:p:1618-1639
    DOI: 10.1016/j.renene.2019.06.085
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    References listed on IDEAS

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    1. Vieira, Abel S. & Stewart, Rodney A. & Lamberts, Roberto & Beal, Cara D., 2018. "Residential solar water heaters in Brisbane, Australia: Key performance parameters and indicators," Renewable Energy, Elsevier, vol. 116(PA), pages 120-132.
    2. Naspolini, Helena F. & Rüther, Ricardo, 2012. "Assessing the technical and economic viability of low-cost domestic solar hot water systems (DSHWS) in low-income residential dwellings in Brazil," Renewable Energy, Elsevier, vol. 48(C), pages 92-99.
    3. Giglio, Thalita & Lamberts, Roberto & Barbosa, Miriam & Urbano, Mariana, 2014. "A procedure for analysing energy savings in multiple small solar water heaters installed in low-income housing in Brazil," Energy Policy, Elsevier, vol. 72(C), pages 43-55.
    4. Martins, F.R. & Abreu, S.L. & Pereira, E.B., 2012. "Scenarios for solar thermal energy applications in Brazil," Energy Policy, Elsevier, vol. 48(C), pages 640-649.
    5. Naspolini, Helena F. & Rüther, Ricardo, 2017. "Impacts of Domestic Solar Water Heating (DSWH) systems on the cost of a hot shower in low-income dwellings in Brazil," Renewable Energy, Elsevier, vol. 111(C), pages 124-130.
    6. Miranda, Raul F.C. & Szklo, Alexandre & Schaeffer, Roberto, 2015. "Technical-economic potential of PV systems on Brazilian rooftops," Renewable Energy, Elsevier, vol. 75(C), pages 694-713.
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    2. Sara Ghaboulian Zare & Reza Hafezi & Mohammad Alipour & Reza Parsaei Tabar & Rodney A. Stewart, 2021. "Residential Solar Water Heater Adoption Behaviour: A Review of Economic and Technical Predictors and Their Correlation with the Adoption Decision," Energies, MDPI, vol. 14(20), pages 1-26, October.
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    5. Choi, Youngjin, 2020. "Performance evaluation of air and liquid-based solar heating systems in various climates in East Asia," Renewable Energy, Elsevier, vol. 162(C), pages 685-700.

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