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- W2510141568 abstract "For IGCC,the primary mvestment is too high due to the demand of high gasification efficiency.For PFBCC,the thermal efficiency is too low due to the relatively low turbine inlet temperature and the hotworking medium of the gas turbine is not easy to clean. A new scheme is proposed for coal fired combinedcycle to overcome the main drawbacks of IGCC and PFBCC. The research targets are developing a new cycleconstruction of coal fired combines cycle to raise the efficiency and reduce the primary investment. Actually,the new scheme is a synthesis of some existing proposals. It adopts partial gasification to reduce the primaryinvestment of the gasification equipment. The un-gasified surplus solid is then feed to a pressurized fluidizedbed boiler,but adopting Curtiss Wright type external combustion t0 10wer the ash content in the workingmedium. The gas fuel from the partial gasifier is combusted in a top combustor to further increase theworking medium temperature. An extremely concise performance estimation method for the new scheme andits equations is proposed in order to easily understand the basic physical meaning of the new system. Sometypical calculations based on this concise method are given. Then, a more detailed computation isaccomplished with Aspen Plus code. The basic feasibility of this scheme is proven to be favorable. Theefficiency is higher than the existing coal fired lGCC plants. The advantage of the new scheme comes fromthe better utilization of coal energy. Almost all the energy of coal is first utilized in the top cycle,and thenthe bottom cycle,just like the gas fueled combined cycle does. The primary investment is lower than theordinary IGCC due to the lack of air separation unit and the adoption of partial gasification. The ash contentis much lower than that of the existing PFBCC plants. If no any harmful ash in working medium is required,the atmospheric fluidized bed can be applied rather than the pressurized fluidized bed. A similar proposalwith atmospheric fluidized bed and its performance estimation are also given. However,its efficiency will belower than the pressurized fluidized bed scheme." @default.
- W2510141568 created "2016-09-16" @default.
- W2510141568 creator A5037000532 @default.
- W2510141568 date "2009-01-01" @default.
- W2510141568 modified "2023-09-27" @default.
- W2510141568 title "A Proposed Scheme for Coal Fired Combined Cycle and Its Concise Performance" @default.
- W2510141568 hasPublicationYear "2009" @default.
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