Simulating a future smart city: An integrated land use-energy model

• Published in: Applied energy Vol. 112; pp. 1466 - 1474
• Main Authors: Yamagata, Yoshiki, Seya, Hajime
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2013
• Subjects: buildings; carbon dioxide; Compact city; econometric models; electricity; energy efficiency; heat island; land use; Land use-transportation-energy model; Photovoltaic (PV); public transportation; Smart city; solar collectors; supply balance; Urban scenarios; vehicles (equipment); Japan, Honshu, Tokyo Prefect., Tokyo; Photovoltaic (PV); Compact city; Smart city; Land use-transportation-energy model; Urban scenarios
• ISSN: 0306-2619; 1872-9118
• DOI: 10.1016/j.apenergy.2013.01.061

► The concept of land use-transportation energy model is demonstrated. ► The spatial explicit land use model is constructed for the Toyo metropolitan area. ► Several future compact/dispersion city scenarios for the year 2050 are analyzed using the model. ► Intra-day dynamics of electricity demand and supply from PV panels under two urban scenarios is simulated. ► Compact urban form may contribute to the reduction of electricity demand from the residential sector. Designing a future smart city (FSC) that copes with the reduction of CO2 has become one of the urgent tasks of the next 20years. One promising approach to achieve FSC is to combine appropriate land use (compact city with energy efficient buildings and photovoltaic panels (PVs)), transportation (electric vehicles (EVs) and public transportation system) and energy systems (smart grid systems), because of the interaction between these elements. However, there are few models which simulate these elements in an integrated manner. This paper presents the concept of the integrated model, and shows the land use-energy part of the model created for the Tokyo metropolitan area, which is the largest Mega city in the world. Firstly, a spatially explicit land use model (urban economic model) is constructed for the study area, and the model is calibrated using existing statistical data. Secondly, possible future compact/dispersion city scenarios for the year 2050 are created using the model. Thirdly, intra-day dynamics (hourly) of electricity demand and supply from PVs, which is assumed to be installed to the roofs of all detached houses in the study area, under two urban scenarios is simulated. The obtained results suggest that [1] “compact” urban form may contribute to the reduction of electricity demand from the residential sector, but [2] PV-supply under the scenario may also be reduced because of the decreased share of detached houses. Hence in the compact city scenario, it is important to discuss the effective use of vacant areas in suburbs, which may be used for large PV installations, or be re-vegetated to mitigate urban heat island effects.