Theoretical and experimental modelling of a heat pipe heat exchanger for high temperature nuclear reactor technology

Laubscher, Ryno; Dobson, Robert T.

doi:10.1016/j.applthermaleng.2013.06.063

Cited by 41 publications

(17 citation statements)

References 2 publications

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“…Heat exchangers are devices that, as the name states, are able to extract heat from where it is unwanted and transfer it to where it may be usefully applied [19][20][21]. They can be found essentially everywhere in modern industry due to current environmental policies [22], adopting different shapes depending on their application including the thermosyphon based designs [15;23], which is the topic of this paper.…”

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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“…Heat pipe-based heat exchangers find use in a wide variety of industries, such as space [4], computing and electronics [5], ventilation and air conditioning (including dehumidification devices) [6], solar energy systems [7], water desalination [8], and nuclear systems [8;9], from temperatures below zero degrees [10], to as high as 950°C [11], depending on the materials composing the pipe and the working fluid used.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of an air-to-water heat pipe-based heat exchanger

Mroue

Ramos

Wrobel

et al. 2015

Applied Thermal Engineering

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An experimental and analytical investigation was conducted on an air-to-water heat exchanger equipped with six wickless heat pipes (thermosyphons) charged with water as the working fluid. The flow pattern consisted of a double pass on the evaporator and condenser sections. The six thermosyphons were all made from carbon steel, measured 2m in length and were installed in a staggered arrangement.The objectives of the reported experimental investigation were to analyse the effect of multiple air passes at different air inlet temperatures (100 to 250°C) and air mass flow rates (0.05 to 0.14kg/s) on the thermal performance of the heat exchanger unit including the heat pipes. The results were compared with a CFD model that assumed the heat pipes were solid rods with a constant conductivity. The conductivity of the pipes was extracted from modifications of correlations available in the literature based around the theory of Thermal Resistance. The results proved to be very accurate within 10% of the experimental values.

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“…This study is focused on the temperature distribution in a heat pipe. Their result also showed that copper heat pipe thermal performance is higher than that for a conventional heat pipe [10]. The present study aims at assessing the effect of zinc oxide nano fluid as the working fluid on the temperature distribution in an aluminum heat pipe.…”

Section: Introductionmentioning

confidence: 99%

“…However, particles in large size tend to quickly settle out of suspension and cause to severe clogging by passing through micro channels. Thereby, the pressure drop increases severely [8,[10][11]. Furthermore, the abrasive actions of these particles cause the erosion of pipelines and industrial equipments [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Parametric investigation of moving properties of zinc oxide nano-fluid

Poladian¹,

Farahbod²

2016

SAJB

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Abstract:The nano fluid is a magic fluid which can enhance the heat transfer. The specific area of nano particles is very high. So, these particles can use in different fields. The zinc oxide nano fluid has different properties such as non toxic and useful for mass and heat transfer fields. Also, heat pipe is a power full device which can improve the heat transfer. So, a heat pipe and zinc oxide nano fluid as the operating fluid is used in this paper. Temperature distribution, nano fluid density and nano fluid shear stress is considered in this work. The results present better temperature distribution of zinc oxide nano fluid relative to the pure water.

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Theoretical and experimental modelling of a heat pipe heat exchanger for high temperature nuclear reactor technology

Cited by 41 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

Experimental and numerical investigation of an air-to-water heat pipe-based heat exchanger

Parametric investigation of moving properties of zinc oxide nano-fluid

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