A study on optimum circulation period of products for minimizing lifecycle energy consumption

Yuji Mizuno*, Naoya Kintoki, Yusuke Kishita, Shinichi Fukushige, Yasushi Umeda


研究成果: Conference article査読

2 被引用数 (Scopus)


Combination of long product lifetime and recycling is effective for reducing material use. However, in the case of products that uses energy in their use phase, early replacement of old products with new energy efficient products may contribute to reduction of lifecycle CO2 emission. In the previous studies, we proposed a formula to calculate optimum circulation period (OCP) of the products based on the improvement of energy efficiency. The formula was applied to the products produced in 1991-2000. This paper calculates the OCP of the latest products and analyzes the effect of rapid circulation of products. As a result, OCP and RCP effects are different from the previous studies, because characteristics of latest products are different from products of 1991-2000. Especially, OCP of Hybrid Electric Vehicles excesses three times than the normal product life span. Special case of rapid circulation between different type products, such as Gasoline Vehicles and Hybrid Electric Vehicles was effective for CO2 emission reduction.

ジャーナルProcedia CIRP
出版ステータスPublished - 2015
イベント22nd CIRP Conference on Life Cycle Engineering, LCE 2015 - Sydney, Australia
継続期間: 2015 4月 72015 4月 9

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 産業および生産工学


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