Abstract
Today, the optimal use of non-renewable energy sources, reducing pollution, and increasing the efficiency of power-generating cycles are of particular importance. There are several ways to increase the efficiency of gas turbines; one that has recently attracted attention is to use an intercooler. However, the efficiency of the heat exchanger used in intercoolers depends on the type of heat exchanger, the characteristics of the operating fluid and the thermal boundary layers, and the pump speed. Improving the thermophysical properties of the working fluid is a passive method of increasing heat transfer, which has attracted the attention of those researching engineering applications. The current review addresses the latest methods of improving gas turbine efficiency using nanofluids and includes experimental and numerical studies. First, the general principles governing turbines are described, then the commonly used types of heat exchangers are introduced. Finally, studies on the use of nanofluids in heat exchangers are reviewed. The technology of producing nanoparticles that can be used in heat exchangers is also discussed. This review article can provide the reader with comprehensive information on making nanofluids and using them in heat exchangers used as intercoolers.
Highlights
Power generation from nuclear power plants has been on the rise recently, in most countries electricity is generated from thermal or hybrid power plants with gas turbines the main components
The results showed that the critical area to provide a thermal duty of 1.4 MW was about 1132 m2 with tube-side and shell-side heat transfer coefficients of 950 W/m2K and 495 W/m2K, respectively
The results showed that heat transfer coefficients for nanofluids depended on the flow rate through the heat exchangers and nanofluid concentration
Summary
Power generation from nuclear power plants has been on the rise recently, in most countries electricity is generated from thermal or hybrid power plants with gas turbines the main components. Guo et al [16] experimentally investigated the intercooled Brayton gas turbine cycle’s irreversibilities They studied the effect of the number of heat transfer units distribution, compressor pressure ratio, specific heat ratios, etc., on the performance of an irreversible regenerative closed intercooled Brayton cycle in terms of thermal efficiency, thermodynamic efficiency, dimensionless power, entropy generation number, and Ecological Coefficient Of Performance (ECOP). The WR-21 was declared to meet future warships’ high-power prime mover requirements and offer an efficient cruise/boost engine in one gine was integrated into the Royal Navy Type 45 Destroyer It was shown the WR-21 was considered an effective cycle gas turbine that could meet the requirements of both conventional propulsion and Integrated Electric Propulsion systems. TTaabbllee33..AA ssuummmmaarryy ooff tthhee rreevviieewweedd lliitteerraattuurree oonn tthhee ppaarraammeetteerrss aaffffeeccttiinngg ggaass ttuurrbbiinnee ppeerrffoorrmmaannccee ((tthheerrmmaall eefffificciieennccyy))
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