CO<sub>2</sub> Payback Time and Reduction Effect of CO<sub>2</sub> Emission Originated from Electricity of Detached Household by Introducing DC LED Lighting System Utilizing Photovoltaic Power Generation and Storage Battery

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  • 太陽光発電と蓄電池を活用した独立系直流LED照明システムの導入に伴う戸建て住宅の電力消費由来CO<sub>2</sub>排出削減効果とCO<sub>2</sub> ペイバックタイムの推計
  • 太陽光発電と蓄電池を活用した独立系直流LED照明システムの導入に伴う戸建て住宅の電力消費由来CO₂排出削減効果とCO₂ペイバックタイムの推計
  • タイヨウコウ ハツデン ト チクデンチ オ カツヨウ シタ ドクリツケイ チョクリュウ LED ショウメイ システム ノ ドウニュウ ニ トモナウ コダテ ジュウタク ノ デンリョク ショウヒ ユライ CO ₂ ハイシュツ サクゲン コウカ ト CO ₂ ペイバックタイム ノ スイケイ

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This study evaluated the lifecycle reduction potential and the payback time of CO2 originated from general detached household electricity consumption by introducing the DC LED lighting system utilizing photovoltaic power generation and storage battery. Among various DC LED lighting systems, the system with storage battery capacity adjusted to night lighting power demand showed relatively high CO2 reduction potential. In the system with storage battery capacity extended to whole daytime surplus power generation, shortening of battery lifetime caused by repeated complete discharge should affect lifecycle CO2 increase of the system. The CO2 payback time of DC LED lighting system varied between 1.5 and 2 years according as several regional characteristics such as electrical grid CO2 emission factor, photovoltaic power condition and storage battery lifetime related to the required capacity.

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