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Energy efficiency measures in affordable zero net energy housing: A case study of the UC Davis 2015 Solar Decathlon home

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  • Alemi, Payman
  • Loge, Frank

Abstract

The 2015 UC Davis Solar Decathlon Team designed and constructed an affordable zero net energy prototype home for California (CA) farmworkers. The prototype was modeled with BEopt and Microsoft Excel® for year-round operation under the Davis, CA climate. Each major energy-efficient feature of the home was separately analyzed to gauge its energy savings impact. The construction strategyof in-line framing, low window to wall ratio, and thermal mass in the floor, annually saved 810 kWh in space conditioning. The appliance scoring methodology evaluated appliances based on water efficiency, energy efficiency, and affordability—this methodology led to the adoption of appliances that yielded an annual energy savings exceeding 400 kWh. A graywater heat recovery system selected for the project, the Nexus, saved roughly 3500 kWh annually of electricity compared to an electric resistance water heater. The combined radiant/night sky system reduced the space conditioning energy of the home by nearly 1400 kWh. Over a full year, the UC Davis Solar Decathlon home is anticipated to be 12.9% net energy positive and consume 43.8% less energy than a conventional home, with the same floor plan, exposed to the Davis climate.

Suggested Citation

  • Alemi, Payman & Loge, Frank, 2017. "Energy efficiency measures in affordable zero net energy housing: A case study of the UC Davis 2015 Solar Decathlon home," Renewable Energy, Elsevier, vol. 101(C), pages 1242-1255.
    • Handle: RePEc:eee:renene:v:101:y:2017:i:c:p:1242-1255
    DOI: 10.1016/j.renene.2016.10.016
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    Cited by:

    1. Casini, Marco, 2020. "A positive energy building for the Middle East climate: ReStart4Smart Solar House at Solar Decathlon Middle East 2018," Renewable Energy, Elsevier, vol. 159(C), pages 1269-1296.
    2. Mehrjerdi, Hasan & Bornapour, Mosayeb & Hemmati, Reza & Ghiasi, Seyyed Mohammad Sadegh, 2019. "Unified energy management and load control in building equipped with wind-solar-battery incorporating electric and hydrogen vehicles under both connected to the grid and islanding modes," Energy, Elsevier, vol. 168(C), pages 919-930.

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