Professor Takeshi Seike, Graduate School of Frontier Sciences, University of Tokyo, Takayuki Isobe, Department of Environment Systems, Faculty of Engineering, Musashino University, Sumitomo Real Estate Co., Ltd. are establishing an "environmental evaluation method" for the renovation of existing housing toward the realization of a carbon-free society. Joint research aimed at was started in December 2021.Currently, we are conducting a survey at the repair sites (12 buildings) in Tokyo.
"Environmental evaluation method" is a tool or method for quantitatively and generally grasping the amount of waste generated, the amount of resources input, the amount of CO2 generated, etc. related to the building.Quantification makes it possible to visualize the reduction effect and compare it with rebuilding.For new construction, the "LCA guideline for buildings" has already been generalized, but a similar method for renovation has not yet been established.
Rather than "rebuilding a new building" that removes everything and builds it from scratch, it is better to reuse the foundations and frameworks and perform "total renovation", which reduces waste generation and resource input, and is "resource-saving" and "saving". While it is presumed to be CO2 ”, this is a quantitative analysis.
It hasn't been done until then.Therefore, when discussing decarbonization of the household sector, improving the environmental performance of new buildings has been the focus of the discussion, and effective measures have not been taken to improve the performance of existing housing stocks that exceed 5,000 million units.
Therefore, the University of Tokyo and Musashino University will provide the accumulated data to Sumitomo Realty & Development, which handles the remodeling of about 8 buildings annually.
We requested a field survey at the repair site and started joint research with the three parties.
In the research, we aim to construct a new "environmental evaluation method" for building renovation, such as resource recycling and CO3 emission reduction effect by renovation, through surveys utilizing digital technology such as 2D modeling.In building renovation, (2) control of industrial waste, (30) reduction of new material input, (XNUMX) reduction of energy required for production and transportation, etc. are quantified, and the effect of COXNUMX emission reduction is visualized, and a further XNUMX-year cycle. We will proceed with the construction of a building LCA (Life Cycle Assessment) evaluation system when rebuilding is repeated and when it is maintained by renovation.
By providing the research results as a general framework, we will contribute to the realization of a stock-type society by promoting a decarbonized society including existing stocks and revitalizing distribution by improving the functions of existing housing, which is a social asset.This research will be divided into phases, and the research results will be announced in stages from the spring of 2022 to 1 to 2 years.
