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SolarEV City concept: Building the next urban power and mobility systems

Unlocking the potentials of EV batteries with roof-top PVs for urban decarbonization

Date:
January 14, 2021
Source:
National Institute for Environmental Studies
Summary:
Cities are responsible for 60-70% of energy-related CO2 emissions. As the world is increasingly urbanized, it is crucial to identify cost-effective pathways to decarbonize. Here, we propose a ''SolarEV City'' concept, in which integrated systems of cities' roof-top PVs with EVs as batteries can supply affordable and dispatchable CO2-free electricity for citie's dwerllers, which can reduce CO2 emission by 54-95% with 26-41% of potential cost savings by 2030.
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Cities have become the focus of global climate mitigation efforts because as they are responsible for 60-70% of energy-related CO2 emissions. As the world is increasingly urbanized, it is crucial to identify cost-effective pathways to decarbonize and enhance the resilience of cities, which ensure the well-being of their dwellers. In this study, we propose a "SolarEV City" concept, in which integrated systems of cities' roof-top photovoltaics and electric vehicles (EVs) supply affordable and dispatchable CO2-free electricity to urban dwellers.

The SolarEV City assumes that 70% of toof-top of cities at maximum are used for PV and all passenger vehciles are converted to EV in cities being used as batteries for PV electricity. We conducted technoeconomic analyses to evaluate the concept in terms of CO2 emission reduction, cost savings, energy suffciency, self-sufficiency, self-consumption for nine Japanese urban areas (Kyoto City, Hiroshima City, Korimaya City, Okayama City, Sapporo City, Sendai City, Niigata City, Kawasaki City, Special districits of Tokyo).

Our analyses indicate that implementations of the concept can meet 53-95 % of electricity demands in nine major Japanese urban areas by 2030 with the use of 70% of roof-top area in the cities. CO2 emission from vehicle use and electricity generation in these areas can be reduced by 54-95% with potential cost savings of 26-41%. High cost-effectiveness and seasonally stable insolation in low latitudes may imply that the concept may be more effective to decarbonize urban environments in emerging economies in low latitudes.

Among several factors, governmental interventions will play a crucial role in realizing such systems, particularly in legislating regulations that enhance penetration of the integrated system of PV and EV and enable formation of decentralized power systems. As bottom-up processes are critical, policy makers, communities, industries, and researchers should work together to build such systems overcoming social and regulatory barriers.


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Materials provided by National Institute for Environmental Studies. Note: Content may be edited for style and length.


Journal Reference:

  1. Takuro Kobashi, Peraphan Jittrapirom, Takahiro Yoshida, Yujiro Hirano, Yoshiki Yamagata. SolarEV City concept: Building the next urban power and mobility systems. Environmental Research Letters, 2020; DOI: 10.1088/1748-9326/abd430

Cite This Page:

National Institute for Environmental Studies. "SolarEV City concept: Building the next urban power and mobility systems." ScienceDaily. ScienceDaily, 14 January 2021. <www.sciencedaily.com/releases/2021/01/210114085426.htm>.
National Institute for Environmental Studies. (2021, January 14). SolarEV City concept: Building the next urban power and mobility systems. ScienceDaily. Retrieved February 24, 2024 from www.sciencedaily.com/releases/2021/01/210114085426.htm
National Institute for Environmental Studies. "SolarEV City concept: Building the next urban power and mobility systems." ScienceDaily. www.sciencedaily.com/releases/2021/01/210114085426.htm (accessed February 24, 2024).

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