An Integrated Environmental Assessment of Virtual Power Plant
Date Issued
2010
Date
2010
Author(s)
Lu, Kuei-Wan
Abstract
Virtual power plant (VPP) is contemplated in this research, which considers electricity supply and electricity final demand, to decrease the environmental impact by changing of the electricity consumption patterns. The electricity consumption varied with electricity final demand is analyzed by the electricity input-output analysis (EIOA), and the environment impact is quantified by life cycle assessment (LCA), including human toxicity (carcinogenic and non-carcinogenic), respiratory, photochemical oxidation, terrestrial ecotoxicity, aquatic ecotoxicity, aquatic acidification, aquatic eutrophication and global warming.
According to EIOA in 2008, the electricity consumptions of industries account for 80% total electricity consumption in Taiwan, and the electricity consumptions of industries are provided to household consumption, export, and other demands. Export is the main demand, which accounts for 58% of the industrial electricity consumption. Besides, sensitive industries of electricity consumption in Taiwan are divided by EIOA into 11 industries, including chemical material, textiles mills, pulp paper and paper products, chemical products, plastic products, non-metallic mineral products, iron and steel, fabricated metal products, electronic parts & components, computers electronic & Optic Prod and electrical equipment.
Compared with EIOA in 2008, VPP is conducted in electricity strategy by adjusting electricity efficiency and electricity supply structure. On one hand, increasing 30% electricity efficiency in sensitive industries and insensitive industries reduce 16.38% and 13.62% industrial electricity consumption, respectively. On the other hand, electricity supply structure of sensitive industries is modified by using liquid nature gas (LNG) as an alternative fuel for the cogeneration system and installing decentralized generation system (DES). The fomer reduces 9-17% environmental impact in human toxicity (carcinogenic), respiratory, terrestrial ecotoxicity and aquatic acidification; the latter reduces 6-10% environmental impact in human toxicity (non-carcinogenic), aquatic ecotoxicity and aquatic eutrophication; and both reduce 7-9% environmental impact in photochemical oxidation and global warming. In summary, owing to reduction of environmental impact categorically, VPP is revealed enough as the electricity consumption pattern to decrease environmental impact.
Subjects
Virtual power plant
Life cycle assessment
Electricity Input-output analysis
Electricity efficiency
Decentralized generation system
Type
thesis
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