Assessment of Waterfront Office Redevelopment Plan on Optimal Building Arrangements with Rooftop Photovoltaics: A Case Study for Shinagawa, Tokyo
Younghun Choi,
Takuro Kobashi,
Yoshiki Yamagata and
Akito Murayama
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Younghun Choi: Center for Global Environment Research, National Institute for Environment Studies, Tsukuba 305-8056, Japan
Takuro Kobashi: Center for Global Environment Research, National Institute for Environment Studies, Tsukuba 305-8056, Japan
Yoshiki Yamagata: Center for Global Environment Research, National Institute for Environment Studies, Tsukuba 305-8056, Japan
Akito Murayama: Department of Urban Engineering, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
Energies, 2022, vol. 15, issue 3, 1-15
Abstract:
Designing waterfront redevelopment generally focuses on attractiveness, leisure, and beauty, resulting in various types of building and block shapes with limited considerations on environmental aspects. However, increasing climate change impacts necessitate these buildings to be sustainable, resilient, and zero CO 2 emissions. By producing five scenarios (plus existing buildings) with constant floor areas, we investigated how buildings and district forms with building integrated photovoltaics (BIPV) affect energy consumption and production, self-sufficiency, CO 2 emission, and energy costs in the context of waterfront redevelopment in Tokyo. From estimated hourly electricity demands of the buildings, techno-economic analyses were conducted for rooftop PV systems for 2018 and 2030 with declining costs of rooftop PV systems. We found that environmental building designs with rooftop PV system are increasingly economical in Tokyo with CO 2 emission reduction of 2–9% that depends on rooftop sizes. Payback periods drop from 14 years in 2018 to 6 years in 2030. Toward net-zero CO 2 emissions by 2050, immediate actions are necessary to install rooftop PVs on existing and new buildings with energy efficiency improvements by construction industry and building owners. To facilitate such actions, national and local governments need to adopt appropriate policies.
Keywords: building; electricity demand; photovoltaics; techno-economic analysis; urban decarbonization; CO 2 emission (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:3:p:883-:d:734522
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