Exergy analysis and annual exergetic performance evaluation of solar hybrid STIG (steam injected gas turbine) cycle for Indian conditions

Selwynraj, A. Immanuel; Iniyan, S.; Polonsky, Guy; Suganthi, L.; Kribus, Abraham

doi:10.1016/j.energy.2014.12.001

Cited by 30 publications

(3 citation statements)

References 25 publications

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“…Selwynraj et al conducted several studies to evaluate solar STIG, specifically for locations in India. Their results showed increasing exergetic efficiency with increasing steamtoair ratio, with peak performance around 54% [77], with a separate economic analysis showing an LCOE of the solar component of energy ranging from $0.29-0.4/kWh (USD) [78]. A later study considered both constant and variable power modes of operation and found that the annual solar share could be as high as 41.7%, depending on the location and plant design.…”

Section: Steam Injection Gas Turbines With Solarmentioning

confidence: 97%

Hybrid concentrated solar thermal power systems: A review

Powell

Rashid

Ellingwood

et al. 2017

Renewable and Sustainable Energy Reviews

198

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Concentrated solar power (CSP), or solar thermal power, is an ideal technology to hybridize with other energy technologies for power generation. CSP shares technology with conventional power generation and can be readily integrated with other energy types into a synergistic system, which has many potential benefits including increased dispatchability and reliability, improved efficiency, reduced capital costs through equipment sharing, and the opportunity for flexible operation by alternating between energy sources, which can lead to improved overall efficiency through synergy of the different energy sources. Another advantage of CSP technology is the ability to readily store via thermal energy storage (TES), making the intermittent solar resource dispatchable. A review of CSP hybridization strategies with coal, natural gas, biofuels, geothermal, photovoltaic (PV), and wind is given. An overview of different configurations for hybridizing CSP with these other energy sources is also provided. Hybridized CSP plants present different types and levels of synergy, depending on the hybrid energy source, the location of the plant, the CSP technology used, and the plant configuration. Coal, natural gas, and biofuel hybrids with CSP present many opportunities to inject solar heat at various temperatures. These combustible fuels provide reliability, dispatchability, and flexibility but are not entirely renewable solutions (with the exception of biofuels). Geothermal, wind, and PV hybrid designs with CSP can be entirely renewable, but lack some of the benefits of hydrocarbon fuels. Effective geothermal-CSP hybrid designs require low temperature operation where efficiency is limited by the power cycle. Wind-CSP and PVT (photovoltaic/thermal) lack dispatchability, but have other advantages. The pursuit of ideal CSP hybrid systems is an important research topic as it allows for further development of CSP technologies while providing an immediate solution that increases the use of solar power.

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Section: Steam Injection Gas Turbines With Solarmentioning

confidence: 97%

Hybrid concentrated solar thermal power systems: A review

Powell

Rashid

Ellingwood

et al. 2017

Renewable and Sustainable Energy Reviews

198

View full text Add to dashboard Cite

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“…Selwynraj et al [16] evaluated both a gas turbine and steam turbine, in particular, the exergetic efficiency and exergy magnitude increased by about 5%, and the condenser air cooling ensured that the last portion of exergy in the gas turbine system was removed. In that study, the exhaust system of the gas turbine reduced the exergy losses, and the efficiency observed was about 58%, and this increased when the steam injection was applied [17].…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of gas turbine-air bottoming combined cycle by heat exchangers and bypass control valves

et al. 2020

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The present study is a comparative energy and exergy analysis of a Proposed gas turbine cycle (PGTC) with a simple gas turbine cycle (SGTC), maintaining the same rate of fuel supply in both cycles. In the PGTC, the air bottoming cycle is operated by exhaust gases from the topping gas turbine cycle by exchanging heat in the heat exchangers (H.E.s) by controlling the path of exhaust gases and compressed air through the bypass control valves. The bypass valve in the topping, as well as the bottoming cycle, direct the combustible product from the combustion chamber to the H.E., in such a way that it optimizes the performance of the proposed combined cycle as compared to SGTC. The results show that the maximum increase in Work net output and thermal efficiency in PGTC compared to SGTC is 65.7% at rp = 4 and turbine inlet temperature (TIT) = 1500 K, whereas the exergy loss by the exhaust gases in the PGTC is much less than the exergy loss by the exhaust gases in the SGTC. The maximum difference in the exergy loss by the exhaust gases in PGTC and SGTC is also observed at rp = 4 and TIT = 1500 K.

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“…Nadir and Ghenaiet [50] studied on the optimization and comparison of three different design versions of a HRSG. Selwynraj et al [51] examined the impacts of TIT, pressure ratio and steam ratio on the effective efficiency, effective power and NOx formation of a solar-hybrid gas turbine cycle with steam injection technique. Selwynraj et al [52] compared the economical performances of a solar-hybrid steam-injected gas turbine (STIG) plant and single solar power generation system for Indian conditions.…”

Section: Introductionmentioning

confidence: 99%

Multi-criteria performance optimization and analysis of a gas–steam combined power system

Gonca

Başhan

2019

J Braz. Soc. Mech. Sci. Eng.

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This paper reports a comprehensive investigation of performances for a gas-steam combined power system (GSCPS) by considering exergy and thermo-ecology criteria. The most known and important parameters such as power density, power output, exergy destruction, exergetic efficiency, ecological coefficient performance (ECOP) and effective ecological power density (EFECPOD) are investigated. The influences of turbine design parameters such as turbine speed, mass flow rate of the working fluid, pressure ratio, equivalence ratio, intake air temperatures and pressures, residual gas fraction, fluid temperatures in heat exchanger, the pressure of high-pressure steam turbine, the pressure of medium-pressure steam turbine, the pressure of low-pressure steam turbine, the pressure of open feedwater heater, the pressure of condenser on the performance specifications have been evaluated. The results indicated that the component properties have remarkable impacts on the performance parameters of the GSCPS.

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Exergy analysis and annual exergetic performance evaluation of solar hybrid STIG (steam injected gas turbine) cycle for Indian conditions

Cited by 30 publications

References 25 publications

Hybrid concentrated solar thermal power systems: A review

Hybrid concentrated solar thermal power systems: A review

Improving the efficiency of gas turbine-air bottoming combined cycle by heat exchangers and bypass control valves

Multi-criteria performance optimization and analysis of a gas–steam combined power system

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