Biomass energy used in a sawmill |
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| Affiliation: | 1. Institute for Economy and the Environment, Tigerbergstrasse 2, CH-9000 St.Gallen, Switzerland;2. State University of New York, College of Environmental Science and Forestry, 320 Bray Hall, 1 Forestry Drive, Syracuse, NY 13210, United States;1. Process System Engineering Center (PROSPECT), Faculty of Chemical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;2. Department of Chemical Engineering, Imperial College London, Roderic Hill Building, South Kensington Campus, London SW7 2AZ, UK;1. School of Material Science and Engineering, University of Jinan, Jinan, 250022, PR China;2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266580, PR China;3. College of Science, China University of Petroleum, Qingdao, 266580, PR China;4. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China;5. Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, PR China;1. University of Seville, Spain;2. Universidad Autónoma de Chile, Chile;3. Andalusian Energy Agency (Andalusian Regional Government), Spain;1. Département de biologie, Université de Moncton, Moncton, New Brunswick E1A 3E9, Canada;2. Département des sciences biologiques, Université du Québec à Montréal, Montréal, Québec H3C 3P8, Canada |
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| Abstract: | Biomass-energy systems are considered to be environmentally superior to traditional ones from the viewpoints of the CO2 mitigation and the effective utilization of resources. However, the energy cost of these systems tends to be higher than that of conventional fossil-fuel systems. Furthermore, the establishment of environmental business models is expected in the near future.In this paper, the environmental improvement and the economics of a biomass-energy system in a sawmill are analyzed by a comparison of a gasification-cogeneration system with a direct-combustion system using scrap-wood material as feedstock fuel. Especially, the break-even point for marketability of the business taking the surplus electric-power into consideration is estimated under the assumption of a renewable-energy purchase system, such as the renewable portfolio standard (RPS) implemented in Japan. Consequently, when biomass-related subsidies are applied, the break-even point of the purchase price of the electric power from the gasification cogeneration becomes 7.7 → 35.7 yen/kW h. Furthermore, if the construction cost decreases by 10%, the break-even point of the purchase price will be cheaper by about 7.4 yen/kW h. |
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