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Going Beyond Code: Monitoring Disaggregated Energy and Modeling Detached Houses in Hawai‘i

1
Environmental Research and Design Laboratory, University of Hawai‘i School of Architecture, 2410 Campus Road, Honolulu, HI 96822, USA
2
Center of Excellence for Smart Building and Community Design, University of Hawai‘i Sea Grant College Program, 2525 Correa Road, HIG 238, Honolulu, HI 96822, USA
3
Hawai‘i Natural Energy Institute, University of Hawai‘i, 1680 East-West Road, POST 109, Honolulu, HI 96822, USA
*
Author to whom correspondence should be addressed.
Buildings 2020, 10(7), 120; https://doi.org/10.3390/buildings10070120
Received: 29 May 2020 / Revised: 28 June 2020 / Accepted: 30 June 2020 / Published: 4 July 2020
Hawai‘i was the first state to establish a statewide 100% renewable energy goal to be met by 2045. To address the potential impact of new residential construction, a team conducted field studies and developed whole-building energy models of detached houses in Hawai‘i. The goal was to inform the state, a major developer, and the Hawai‘i design community on how current residential design could be modified to meet the newly adopted energy codes and renewable energy goals. Seven houses with air-conditioning were monitored for disaggregated energy use, temperature, and humidity for one year. The building simulation software BEoptTM v.2.8 was used to conduct parametric analyses and cost/energy optimizations to evaluate design options. The energy-optimized model for this hot-humid climate included the following: increasing the efficiency of the air-conditioning system; utilizing ceiling fans with occupancy sensors while increasing the thermostat set-point; a light-colored exterior finish and roof; a radiant barrier; longer eaves; and Energy Star appliances. The energy-optimized model reduced the annual site energy by approximately 47.1% compared to the model that minimally complied with the International Energy Conservation Code 2015. A 4.5-kW grid-tied photovoltaic array would achieve a net-zero annual site energy value. View Full-Text
Keywords: building simulation; residential; monitored; sub-metered; energy efficiency measures; subtropical building simulation; residential; monitored; sub-metered; energy efficiency measures; subtropical
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Figure 1

  • Externally hosted supplementary file 1
    Doi: http://dx.doi.org/10.17632/37nghgcvxh.2
    Description: Monitored data and BEopt files are archived on Mendeley data.
MDPI and ACS Style

Meguro, W.; Peppard, E.; Meder, S.; Maskrey, J.; Josephson, R. Going Beyond Code: Monitoring Disaggregated Energy and Modeling Detached Houses in Hawai‘i. Buildings 2020, 10, 120.

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