Experimental performance of a waste heat recovery and utilization system with a looped water-in-steel heat pipe

Habeebullah, M.H.; Akyurt, M.; Najjar, Yousef S.H.; El-Kalay, A.K.

doi:10.1016/s1359-4311(97)00023-9

Cited by 9 publications

(3 citation statements)

References 5 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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“…This means that refrigeration operators can purchase gas at the lowest spot market prices available during the year. For these reasons, we feel you will see more and more DHC plants providing steam in winter months and chiller loads during the summer, Figure 14 [78]. It has become essential for the power and energy engineers to search for the renewable energy sources like wind, sun, geothermal, ocean and biomass as prospective and cost-effective alternatives for traditional energy sources.…”

Section: Retrofittingmentioning

confidence: 99%

Energy Technologies in the Transition Period between the Fossil and Renewable Eras

Najjar

2019

OAJESS

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The scarcity of conventional energy resources rises in the fuel prices and harmful emissions from the burning of fossil fuels have made power generation from conventional energy sources unsustainable and unviable. It is envisaged that the supply-demand gap will continue to rise exponentially unless it is met by some other means of power generation. Inaccessibility of the grid power to the remote places and the lack of rural electrification have prompted for alternative sources of energy until a developed stage of using renewable energy is mature and economical. Until then, a significant research and development is needed in the field of innovative use of hydrocarbons and energy efficiency, such as: I. Carbon Capture, Storage and Utilization (CCSU) technologies. II. Conversion of gas to liquids and chemicals (GTL). III.Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG) technologies. IV.Fuel Cell and Hydrogen (FCH).V. Intelligent Energy Management (energy storage). VI.Repowering and retrofitting. VII.Hybrid Power Generating Systems (fossil and renewable sources). VIII.Green Refinery Processes and Systems.

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“…And the exhaust gas temperature inlet into the evaporator section of 300 o C. Their results shown the CHPHE's effectiveness were between 0.18 and 0.63. Habeebullah et al [7] reported the heat revoery from the exshaust gas of industrial gas turbine engines by using heat pipe. The exhaust gas temperature was flow through the evaporator section of 300 o C. Their results shown the system is able to extract between 70 and 93% of the technically recoverable energy from exshaust gases.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of effectiveness of a closed-end flat heat pipe heat exchanger (CEFHPHE)

Srimuang¹,

Khantikomol²,

Krittacom³

2013

KKU EN J

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The effectiveness of a closed-end flat heat pipe heat exchanger (CEFHPHE) was investigated experimentally. The CEFHPHE consists of three parts, which include the evaporator, adiabatic and condenser sections that the lengths were 300, 100 and 300 mm respectively. The standard copper tube with inner diameter of 8.6 mm and 0.46 mm thick was pressed to reform its cross sectional area for a flat tube, and then bent to many U-shapes, which was closed at both ends. The water was used for working fluid with filling ratios of 45% of internal volume. In experiments, hot air was used for supplying the heat to the evaporator section with different temperatures (105-145 o C), and different velocities (0.5-2.0 m/s). Fresh air was used for cooling condenser section with temperature approximately 30 o C, and was kept constant velocity at 0.5 m/s. The experimental results indicated that the effectiveness of CEFHPHE increase with the inlet hot air temperature, and decrease with the increase of hot air velocity. In addition, the effectiveness of the CEFHPHE obtained from the experiments varied between 0.35 and 0.74.

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Experimental performance of a waste heat recovery and utilization system with a looped water-in-steel heat pipe

Cited by 9 publications

References 5 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

Energy Technologies in the Transition Period between the Fossil and Renewable Eras

An experimental investigation of effectiveness of a closed-end flat heat pipe heat exchanger (CEFHPHE)

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