Modeling and simulation of combined gas turbine engine and heat pipe system for waste heat recovery and utilization

Lamfon, N. J.; Najjar, Yousef S.H.; Akyurt, M.

doi:10.1016/s0196-8904(96)00175-6

Cited by 32 publications

(9 citation statements)

References 2 publications

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“…Heat pipes can also be equipped with a wick structure, having the advantage of being able to transfer heat even when turned upside-down, as the condensate is returned to the evaporator via capillary action forces [15]. Heat pipes have been tested and proven in the thermal management of electronics and in the space industry [24;25], in heat storage systems [23;26;27], in renewable energy [28;29] and in waste heat recovery [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Experimental and analytical performance investigation of air to air two phase closed thermosyphon based heat exchangers

Danielewicz

Sayegh

Śniechowska

et al. 2014

Energy

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In recent years, the use of wickless heat pipes (thermosyphons) in heat exchangers has been on the rise, particularly in gas to gas heat recovery applications due to their reliability and the level of contingency they offer compared to conventional heat exchangers. Recent technological advances in the manufacturing processes and production of gravity assisted heat pipes (thermosyphons) have resulted in significant improvements in both quality and cost of industrial heat pipe heat exchangers. This in turn has broadened the potential for their usage in industrial waste heat recovery applications. In this paper, a tool to predict the performance of an air to air thermosyphon based heat exchanger using the ε-NTU method is explored. This tool allows the predetermination of variables such as the overall heat transfer coefficient, effectiveness, pressure drop and heat exchanger duty according to the flow characteristics and the thermosyphons configuration within the heat exchanger. The new tool's predictions were validated experimentally and a good correlation between the theoretical predictions and the experimental data, was observed.

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Section: Introductionmentioning

confidence: 99%

Experimental and analytical performance investigation of air to air two phase closed thermosyphon based heat exchangers

Danielewicz

Sayegh

Śniechowska

et al. 2014

Energy

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“…[23][24][25][26][27][28] A more advanced power cycle option is the nuclear air-Brayton combined cycle that has peaking capability. [3][4][5][29][30][31][32] MSRs were originally developed as part of the U.S. Aircraft Nuclear Propulsion Program to power a jet bomber of unlimited range; that is, salt reactors were originally HEAT EXCHANGERS WITH HEAT PIPES FOR SALT-COOLED REACTORS • ZOHURI et al 5…”

Section: Iib Salt Reactor Heat Exchanger Requirementsmentioning

confidence: 99%

Heat-Pipe Heat Exchangers for Salt-Cooled Fission and Fusion Reactors to Avoid Salt Freezing and Control Tritium: A Review

2019

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The fluoride-salt-cooled high-temperature reactor and some proposed fusion reactors use clean fluoride salts as reactor coolants that have melting points above 450°C and generate tritium. Tritium diffuses through most hot metals, thus methods to capture tritium and prevent its release to the environment are required. Molten salt reactors (MSRs) use fluoride or chloride salts with high melting points where the fuel is dissolved in the coolant. MSR systems produce volatile fission products (Xe, Kr, etc.) and some produce significant tritium. We examine the use of heat exchangers with multiple heat pipes for salt-cooled fission and fusion systems that serve four functions: (1) transfer heat from primary coolant to power cycle, secondary loop, or environment; (2) provide the safety function of a secondary loop by isolating the reactor salt coolant from the high-pressure power cycle; (3) stop heat transfer if the reactor coolant approaches its freezing point to prevent blockage of the primary loop; and (4) block tritium escape to the environment with recovery of the tritium. Each of these capabilities in some form has been demonstrated in a heat pipe system, but not all the functions have been demonstrated in a single system because there has been no need for all of these capabilities in a single system. We review the status of heat pipe technology and the limits of heat pipe technology as the starting points for decisions on the development of such heat pipe systems.

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“…Lamfon et al 17 studied the performance of a GT with a capacity of 23.7 MW operated at an ambient temperature between 30 and 45 °C. They reported an 11% improvement in the net when the inlet of the GT engine is provided with cold air.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of a large-scale thermal power plant based on the best industrial practices

Najjar

Abu‐Shamleh

2020

Sci Rep

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The aim of this study is to assess and evaluate the performance of a large-scale thermal power plant (TPP). The performance rating was conducted in compliance with the statistical principles. The data for this analysis were obtained for a TPP with an installed capacity of 375 MW during a span of 8 years (2010–2017). Four parameters were used to evaluate the performance of the TPP including the availability, the reliability, the capacity factor, and the thermal efficiency. These parameters were calculated using a set of equations and then compared to the international best practices and target values. The results indicate that approximately 91% of the expected capacity was available throughout the studied period against the industry best practice of 95%. However, the average TPP’s reliability was found to be approximately 95% against the target value of 99.9%. Furthermore, the average capacity factor throughout the studied period is 70% as against the international value of 40–80%. Moreover, the thermal efficiency of the TPP is 40% against the target value of 49%. Due to the outage hours and malfunctions, the power losses throughout the studied period reached 846 MW. Overall, the analysis indicates that the studied TPP is not within the scope of the best industrial practices.

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Modeling and simulation of combined gas turbine engine and heat pipe system for waste heat recovery and utilization

Cited by 32 publications

References 2 publications

Experimental and analytical performance investigation of air to air two phase closed thermosyphon based heat exchangers

Experimental and analytical performance investigation of air to air two phase closed thermosyphon based heat exchangers

Heat-Pipe Heat Exchangers for Salt-Cooled Fission and Fusion Reactors to Avoid Salt Freezing and Control Tritium: A Review

Performance evaluation of a large-scale thermal power plant based on the best industrial practices

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