Welcome to Open Science
Contact Us
Home Books Journals Submission Open Science Join Us News
Simulations of Second Generation of Pressurized Fluidized Circulating Bed Combined Cycle
Current Issue
Volume 5, 2018
Issue 5 (October)
Pages: 122-127   |   Vol. 5, No. 5, October 2018   |   Follow on         
Paper in PDF Downloads: 19   Since Oct. 26, 2018 Views: 1001   Since Oct. 26, 2018
Authors
[1]
Hossin Omar, Mechanical Engineering Department, University of Benghazi, Benghazi, Libya.
Abstract
The performance of the second generation of the Pressurized Fluidized Circulating Bed (PFCB) combined cycle is presented in this chapter. The second generation of PFCB combined cycle consists of gas turbine cycle and steam turbine cycle including reheat. Simulations to balance the energy between the elements of the unit where conducted. The PFCB is as a combustor of solid fuel (coal) and it is a steam generator at the same time. The small pieces of coal motion behaves as fluid when it exposes to a compressed air, which enters from the bottom of the PFCB unit. The small pieces of coal air mixture flow through the fluidizer, which is a big disk has small holes allows the mixture to flow up uniformly. This uniform motion of solid fuel air mixture accelerates the combustion and increases its efficiency, and this in turn increases the efficiency of the unit. The heat release inside the PFCB unit exchange with water flow in tubes inside the unit to produce super-heated steam to operate two stage steam turbines. The remaining heat energy in a form of hot gases exits from the PFCB unit enters to a cyclone to separate the solid pieces in form of ash. While the filtered hot gases operates a gas turbine. The simulations were carried out for PFCB combined cycle plant. It was found that increasing of the steam inlet pressure results in an increase in the steam and the combined cycle efficiencies. The flue gases of the gas turbine flue gases inlet temperature results in an increase in the gas turbine and in the combined cycle thermal efficiencies. The peak of the PFCB based combined cycle thermal efficiency occurs at a compression ratio of approximately 18. The simulations were carried out for only one fuel composition and for a compression ratio ranges between 1 to 40.
Keywords
Pressurized Fluidized Circulating Bed (PFCB), Higher Heating Value (HHV), Atmospheric Circulating Fluidized Bed (ACFB)
Reference
[1]
Kumar M. Sellakumar and Thomas W, Application Of Pressurized Circulating Fluidized Bed Technology For Combined Cycle Power Generation.. Lamar Ahlstrom Pyropower, Inc. 8925 Rehco Road, San Diego CA 92121, U.S.A.
[2]
Nikolai V. Khartchenko, Vadym M. Kharchenko, advanced Energy Systems, Second Edition.
[3]
W. F. Domeracki, D. M. Bachovchin and T. E. Dowdy, Topping Combustor Status for Second-Generation Pressurized Fluidized Bed Cycle Application, Gas Turbines Power 119 (1), 27-33 (Jan 01, 1997) (7 pages).
[4]
Jianfeng Wang, Yuefa Wang, Hugo A. Jakobsen; The modeling of circulating fluidized bed reactors for SE-SMR process and sorbent; Chemical Engineering Science, Volume 108, 28 April 2014, Pages 57-65.
[5]
P. Basu, P. K. Nag, Heat Transfer To Walls Of A Circulating Fluidized- Bed Furnace -Review Article Number 48.
[6]
Russell & Adebiyi, Classical Thermodynamics.
[7]
Omar H, Elmnefi M. Simulations of Pressurized Fluidized Circulating Bed Based Combined Cycle (PFCB). ASME. ASME Power Conference, Volume 2: doi: 10.1115/POWER2014-32246; ISBN: 978-0-7918-4609-4.
[8]
Richard E. Sontag, Clauus Borgnakke, and Gordon J. Van Wylen, Fundamentals of Thermodynamics, sixth edition, John Wiley., 2003.
[9]
Gottung, E. J. and S. L. Darling (1989). “Design Considerations for CFB steam Generators, ” in Proc. Of of 10th Int. Conf. on Fluidized Bed Combustion, A. Manaker, ed. ASME, New York.
[10]
Omar, H., Kamel, A. and Alsanousi, M. (2017) Performance of Regenerative Gas Turbine Power Plant. Energy and Power Engineering, 9, 136-146. doi: 10.4236/epe.2017.92011.
Open Science Scholarly Journals
Open Science is a peer-reviewed platform, the journals of which cover a wide range of academic disciplines and serve the world's research and scholarly communities. Upon acceptance, Open Science Journals will be immediately and permanently free for everyone to read and download.
CONTACT US
Office Address:
228 Park Ave., S#45956, New York, NY 10003
Phone: +(001)(347)535 0661
E-mail:
LET'S GET IN TOUCH
Name
E-mail
Subject
Message
SEND MASSAGE
Copyright © 2013-, Open Science Publishers - All Rights Reserved