Affiliation:
1. Norwegian Institute of Technology / SINTEF, Trondheim, Norway
Abstract
Combined cycles have gained widespread acceptance as the most efficient utilization of the gas turbine for power generation, particularly for large plants. A variety of alternatives to the combined cycle that recover exhaust gas heat for re-use within the gas turbine engine have been proposed and some have been commercially successful in small to medium plants. Most notable have been the steam-injected, high-pressure aeroderivatives in sizes up to about 50 MW. Many permutations and combinations of water injection, steam injection, and recuperation, with or without intercooling, have been shown to offer the potential for efficiency improvements in certain ranges of gas turbine cycle design parameters. A detailed, general model that represents the gas turbine with turbine cooling has been developed. The model is intended for use in cycle analysis applications. Suitable choice of a few technology description parameters enables the model to represent accurately the performance of actual gas turbine engines of different technology classes. The model is applied to compute the performance of combined cycles as well as that of three alternatives. These include the simple cycle, the steam-injected cycle, and the dual-recuperated intercooled aftercooled steam-injected cycle (DRIASI cycle). The comparisons are based on state-of-the-art gas turbine technology and cycle parameters in four classes: large industrial (123–158 MW), medium industrial (38–60 MW), aeroderivatives (21–41 MW), and small industrial (4–6 MW). The combined cycle’s main design parameters for each size range are in the present work selected for computational purposes to conform with practical constraints. For the small systems, the proposed development of the gas turbine cycle, the DRIASI cycle, are found to provide efficiencies comparable or superior to combined cycles, and superior to steam-injected cycles. For the medium systems, combined cycles provide the highest efficiencies but can be challenged by the DRIASI cycle. For the largest systems, the combined cycle was found to be superior to all of the alternative gas turbine based cycles considered in this study.
Subject
Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering
Reference19 articles.
1. Bolland, O., 1990, “Analysis of Combined and Integrated Gas Turbine Cycles,” Dissertation, Norwegian Institute of Technology, University of Trondheim, Norway.
2. Bolland
O.
, 1991, “A Comparative Evaluation of Advanced Combined Cycle Alternatives,” ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER, Vol. 113, pp. 190–197.
3. Boyle, R. J., 1979, “Effect of Steam Addition on Cycle Performance of Simple and Recuperated Gas Turbines,” NASA Technical Paper 1440.
4. Elmasri, M. A., 1986a, “GASCAN—An Interactive Code for Thermal Analysis of Gas Turbine Systems,” presented at the ASME Winter Annual Meeting, Anaheim, CA.
5. Elmasri
M. A.
, 1986b, “On Thermodynamics of Gas Turbine Cycles: Part 2—A Model for Expansion in Cooled Turbines,” ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER, Vol. 108, pp. 151–159.
Cited by
67 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献