Gas Turbine Blade Tip Heat Transfer and Cooling: A Literature Survey

Sundén, Bengt; Xie, Gongnan

doi:10.1080/01457630903425320

Cited by 101 publications

(38 citation statements)

References 148 publications

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“…Instances of short-term heating of blade material above the regular operating temperature quite often occur in the course of gas turbine operation. Therefore, such parameters as heat resistance and high-temperature creep resistance of the alloy to supercritical temperature are of crucial importance (Sieniawski, 1995;Sunden & Xie, 2010). The blades were cleaned in ultrasonic washers both before and after they were subjected to the soaking process.…”

Section: A Methods For the Assessment Of Condition Of New Gas Turbine mentioning

confidence: 99%

New Non-Destructive Methods of Diagnosing Health of Gas Turbine Blades

Błachnio¹,

Bogdan²,

Kułaszka³

2011

Advances in Gas Turbine Technology

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Section: A Methods For the Assessment Of Condition Of New Gas Turbine mentioning

confidence: 99%

New Non-Destructive Methods of Diagnosing Health of Gas Turbine Blades

Błachnio¹,

Bogdan²,

Kułaszka³

2011

Advances in Gas Turbine Technology

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“…This in itself is remarkable, as it allows for the possibility of achieving unprecedented STE efficiencies of greater than 30% at temperatures within the limits of operation of commercially available steam turbines. Additionally, if the materials of construction, particularly for the steam turbines, are modified to enable operation at higher temperatures above 1,250 K, the SWP cycles can achieve STE efficiencies that are greater than 40% (35,36). Recent studies show that higher temperatures of up to 1,773 K are achievable for solar systems and gas turbines (35,37,38).…”

Section: Benefits Relative To the Standalone Processesmentioning

confidence: 99%

Round-the-clock power supply and a sustainable economy via synergistic integration of solar thermal power and hydrogen processes

Gençer

Mallapragada

Maréchal

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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We introduce a paradigm-"hydricity"-that involves the coproduction of hydrogen and electricity from solar thermal energy and their judicious use to enable a sustainable economy. We identify and implement synergistic integrations while improving each of the two individual processes. When the proposed integrated process is operated in a standalone, solely power production mode, the resulting solar water power cycle can generate electricity with unprecedented efficiencies of 40-46%. Similarly, in standalone hydrogen mode, pressurized hydrogen is produced at efficiencies approaching ∼50%. In the coproduction mode, the coproduced hydrogen is stored for uninterrupted solar power production. When sunlight is unavailable, we envision that the stored hydrogen is used in a "turbine"-based hydrogen water power (H 2 WP) cycle with the calculated hydrogen-toelectricity efficiency of 65-70%, which is comparable to the fuel cell efficiencies. The H 2 WP cycle uses much of the same equipment as the solar water power cycle, reducing capital outlays. The overall sun-toelectricity efficiency of the hydricity process, averaged over a 24-h cycle, is shown to approach ∼35%, which is nearly the efficiency attained by using the best multijunction photovoltaic cells along with batteries. In comparison, our proposed process has the following advantages: (i) It stores energy thermochemically with a two-to threefold higher density, (ii) coproduced hydrogen has alternate uses in transportation/chemical/petrochemical industries, and (iii) unlike batteries, the stored energy does not discharge over time and the storage medium does not degrade with repeated uses. solar | electricity | hydrogen | solar thermal power | process synthesis D iminishing fossil fuel resources and increasing atmospheric greenhouse gas levels raise the ever-growing interest in developing and implementing renewable energy conversion technologies and strategies to meet society's energy needs (1-5). Among renewable energy sources, solar energy is prominent for its abundance. To put it into perspective, in 1.5 h 6.5 × 10 20 J of solar energy reaches the earth, which is more than the primary energy consumed cumulatively by humans on the planet in 1 y (∼5.4 × 10 20 J in 2013) (4, 6). However, harnessing solar energy for uninterruptable energy supply remains a challenge because it requires conversion systems to be integrated with efficient storage systems to overcome the inherent intermittency and uneven geographical distribution of solar irradiation.Here, we introduce the concept of "hydricity" to address this challenge. We propose solar thermal coproduction of hydrogen and electricity and their subsequent synergistic use to support a sustainable economy. Hydricity not only leads to efficient production of solar electricity but also opens up many more possibilities: a sustainability roadmap. In the subsequent sections, we present an example hydricity process to supply uninterruptable electricity round-the-clock at a constant power rate with a calculated overall sun-to-electr...

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“…The compressed air (at 650°C) used for maintaining their temperature around 1000°C. The reliable operation can be ensured by perfect cooling by preventing premature failure of blades and vanes [5]. The design of complicated and challenging task because it involves complex interaction, numerical analysis, developing turbulent layer, forming streamlines etc., over curved surfaces [6].…”

Section: Introductionmentioning

confidence: 99%

Structural Investigation on Cooling Design Influences in Rene-77 made Gas Turbine Guide Vanes

Saravanan¹,

Reddy²

2017

ijastems

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-Even though high temperature materials are preferred for gas turbine blades and guide vanes, appropriate design of its cooling is imperative. Selection of cooling and its design is very intricate task. With extreme care, knowledge and sophisticated facilities required to perform them. This research investigates the cooling designs on gas turbine guide vane made-up of Rene -77. Both existing impingement cooling designs as well as an improved showerhead cooling design are investigated. The structural design and finite element analysis performed in Pro/E. The result shows that the improved design out performs.

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Gas Turbine Blade Tip Heat Transfer and Cooling: A Literature Survey

Cited by 101 publications

References 148 publications

New Non-Destructive Methods of Diagnosing Health of Gas Turbine Blades

New Non-Destructive Methods of Diagnosing Health of Gas Turbine Blades

Round-the-clock power supply and a sustainable economy via synergistic integration of solar thermal power and hydrogen processes

Structural Investigation on Cooling Design Influences in Rene-77 made Gas Turbine Guide Vanes

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