期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：2
页码：9285
出版社：S&S Publications
摘要：Biomass based power plant can be an excellent option for community scale power generation to overcomethe fossils fuel shortage and environmental issues. Thermal performance and sizing of an indirectly heated combinedcycle plant employing topping gas turbine (GT) block and bottoming steam turbine (ST) block integrated with biomassgasifier is analysed in this paper. The plant is capable of producing topping 20 kWe fixed output along with bottomingsteam turbine output. A mix of Olive tree leaves and pruning is considered as fuel feed. Novelty of the scheme exists inthe heating process of the topping GT cycle, which is done in an external combustor-heat exchanger (CHX) unit ratherthan the conventional combustor of GT cycle. The plant configuration is modelled and analysed using Cycle-Temposoftware. Both energetic and exergetic performances are analysed over a range of topping cycle pressure ratio (4-20)and for different turbine inlet air temperatures (TIT=900, 1000 and 1100 deg C). In the base case scenario (toppingcycle pressure ratio=4 and TIT= 900 deg C), the system efficiency is about 30.5%. The plant attains maximumefficiency at pressure ratio range 6-9 depending upon the TIT. Required specific air flow, which indicates the size ofthe ducting and CHX unit of the topping cycle decreases with increase in pressure ratio and at higher TIT’s. From theSecond Law analysis it is found that the major exergy losses occur at the gasifier and combustor-heat exchanger units,together account for 44% of the fuel exergy value.
