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| Life-cycle analysis of contribution of developing gas engines to GHG emissions reduction in China |
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Abstract In order to analyze the greenhouse gas emissions reduction potential of gas engines, life-cycle analysis was carried out to calculate the life-cycle greenhouse gas emissions of different fuels, and based on the results, the emissions of the according engines were calculated. The “best case” and “without gas engines” scenarios of gas engine development were established in the analysis. Based on the analysis results, the reduction of greenhouse gas emissions by domestic gas engines in 2020 was predicted and the proportion of the gas consumption of gas engines to the gas supply was estimated. The results show that, in the best case promoting gas engines would make considerable contribution to the greenhouse gas emissions reduction. It would help to reduce about 7.47, 18.25 and 450.1Mt CO2e in city public transportation, ship power and thermal power generation fields, respectively, and its national wide CO2e reduction contribution would be 5.3%. Natural gas, coal mined gas and landfill gas that consumed by gas engines would account for 15%, 18.5% and 50% of the supply of these gases, respectively. Considering the domestic gas energy structure and gas fuel supply status, promoting gas engines is feasible in China.
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Received: 05 April 2014
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