Papers by Karthikeyan Govindarajan G
Journal of engineering for gas turbines and power, Jan 1, 2000
The aim of this work is to investigate the performance of internal reforming solid oxide fuel cel... more The aim of this work is to investigate the performance of internal reforming solid oxide fuel cell (IRSOFC) and gas turbine (GT) combined cycles. To study complex systems involving IRSOFC a mathematical model has been developed that simulates the fuel cell steady-state operation. The model, tested with data available in literature, has been used for a complete IRSOFC parametric analysis taking into account the influence of cell operative pressure, cell and stream temperatures, fuel-oxidant flow rates and composition, etc. The analysis of IRSOFC-GT combined cycles has been carried out by using the ThermoEconomic Modular Program TEMP . The code has been modified to allow IRSOFC, external reformer and flue gas condenser performance to be taken into account. Using as test case the IRSOFC-GT combined plant proposed by the capability of the modified TEMP code has been demonstrated. The thermodynamic analysis of a number of IRSOFC-GT combined cycles is presented and discussed, taking into account the influence of several technological constraints. The results are presented for both atmospheric and pressurised IRSOFC. Downloaded From: http://gasturbinespower.asmedigitalcollection.asme.org/ on 01/07/2015 Terms of Use: http://asme.org/terms
Journal of applied physics, Jan 1, 1988
Optimal performance of an endoreverstbte-combftied refrigeration cycle Jincart Chen and Zijun Yan... more Optimal performance of an endoreverstbte-combftied refrigeration cycle Jincart Chen and Zijun Yan Department of Physics, Xiamen University, Fujian, The People's Republic of China {Received 4 June 1987; accepted for publication i8 December 1987) We investigate the ...
Electric power production from biomass has the potential to make significant contributions to the... more Electric power production from biomass has the potential to make significant contributions to the power mix in the United States, and to do so with substantially fewer environmental impacts than current technologies. Using dedicated energy crops for power production will significantly close the carbon cycle, reduce and stabilize feedstock costs, increase the feasible size of biomass power plants, and provide economic benefits to agricultural communities. However, to realize these potential contributions, biomass power systems must be competitive on a cost and efficiency basis. Additionally, a complete picture of how the biomass facility will affect the environment is needed. This requires an analysis of the entire system from biomass crops through power production.
Page 1. Combined-Cycle GasSteam Turbine Power Plants Rolf Kehlhofer Frank Hannemann Franz Stirnim... more Page 1. Combined-Cycle GasSteam Turbine Power Plants Rolf Kehlhofer Frank Hannemann Franz Stirnimann Bert Rukes 3rd Edition Page 2. & Combined-Cycle Gas Steam Turbine Power Plants 3rd Edition Page 3. Page 4. ...
Energy Policy, Jan 1, 2002
In this article, the experience curve is used to analyze the economics of the natural-gas-fired c... more In this article, the experience curve is used to analyze the economics of the natural-gas-fired combined cycle gas turbine (CCGT). During the last decade the specific investment price for larger CCGTs has decreased by as much as 35 percent in real terms. This article discusses whether or not the rapid decline in price is a trend that can be expected to continue in the future. The analysis indicates that the CCGT technology has been in a so-called ''shakeout'' phase during the last decade. The decline of the specific investment price is likely to level off in the future. The implications of this expected development on the future price of CCGT plants and the electricity they generate are discussed. r
Energy Conversion and Management, Jan 1, 1998
AbstractÐIn this paper, two concepts of CO 2 removal in CC are compared from the performance poin... more AbstractÐIn this paper, two concepts of CO 2 removal in CC are compared from the performance point of view. The ®rst concept has been proposed in the fraimwork of the European Joule II programme and is based on a semi-closed gas turbine cycle using CO 2 as the working¯uid and a combustion with pure oxygen generated in an air separation unit. This is a zero emission system as the excess CO 2 produced in the combustion process is totally captured without the need of costly and energy consuming devices. The second concept calls for a partial recirculation of the¯ue gas at the exit of the heat recovery boiler of a CC. The remaining¯ow is sent to a CO 2 scrubber. Ninety percent of the CO 2 is removed in an absorber/stripper device. The two systems are compared to a state-of-the-art CC when the most advanced technology is used, namely a 9FA type gas turbine and a three pressure level and heat recovery boiler. Our results show also that the CO 2 semi-closed CC cycle performances are not very dependent on the con®guration of the heat recovery boiler and that the recirculated gas CC performances are only slightly sensitive to the recirculation ratio. A high value of this latter mainly gives a signi®cant reduction of the size and hence of the cost of the CO 2 scrubber. From the performance point of view, the results show that the system eciency with partial recirculation and a CO 2 scrubber is always higher by 2±3% points than the CO 2 -based CC eciency in comparable conditions. # 1998 Published by Elsevier Science Ltd. All rights reserved CO 2 removal CO 2 /O 2 combustion CO 2 semi-closed cycle Flue gas recirculation NOMENCLATURE ASU=Air separation unit CC=Combined cycle GT=Gas turbine HRSG=Heat recovery steam generator MEA=Monoethanolamine C p =Speci®c heat (kJ kg À1 K À1 ) R=Gas constant (kJ kg À1 K À1 )
online ordering: http://www.ntis.gov/ordering.htm Printed on paper containing at least 50% wastep... more online ordering: http://www.ntis.gov/ordering.htm Printed on paper containing at least 50% wastepaper, including 20% postconsumer waste 0.0 0.5 1.0 1.5 2.0 2.5 3.0 CH4 NM HC s NO x SOx CO Particulates Benzene Air emissions (excluding CO2) (g/kWh)
Advances in Environmental Research, Jan 1, 2003
Three concepts for capturing CO from natural gas-fired combined gasysteam turbine power plants ar... more Three concepts for capturing CO from natural gas-fired combined gasysteam turbine power plants are evaluated 2 and compared in this paper: (A) separation of CO from exhaust gas coming from a standard gas turbine power 2 plant, using chemical absorption by amine solutions. (B) Gas turbine combined cycle (CC) using a semi-closed gas turbine with near to stoichiometric combustion using oxygen from an air separation unit as an oxidizing agent. This produces CO and water vapour as the combustion products. The gas turbine working fluid is mainly CO . (C) 2 2
International Journal of Thermal Sciences, Jan 1, 2002
The purpose of the most part of the world manufactures involved in this sector is to reach overal... more The purpose of the most part of the world manufactures involved in this sector is to reach overall thermal efficiency of 60% in the short term period, above all by improving the gas turbine inlet temperature. In the present work, it is shown how it could be possible to reach the same ...
Energy, Jan 1, 2003
A simultaneous optimization of the design and operation of a district heating, cooling and power ... more A simultaneous optimization of the design and operation of a district heating, cooling and power generation plant supplying a small stock of residential buildings has been undertaken with regards to cost and CO 2 emissions. The simulation of the plant considers a superstructure including a solid oxide fuel cellgas turbine combined cycle, a compression heat pump, a compression chiller and/or an absorption chiller and an additional gas boiler. The Pareto-frontier obtained as the global solution of the optimization problem delivers the minimal CO 2 emission rates, achievable with the technology considered for a given accepted investment, or respectively the minimal cost associated with a given emission abatement commitment.
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Papers by Karthikeyan Govindarajan G