Heat utilisation technologies: A critical review of heat pipes

Chan, Cho Lik; Siqueiros, Eric; Ling‐Chin, Janie; Royapoor, Mohammad; Roskilly, Anthony Paul

doi:10.1016/j.rser.2015.05.028

Cited by 143 publications

(50 citation statements)

References 131 publications

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“…Boiling is a multi-phase and efficient thermal energy transfer process due to its high latent heat [2]. Boiling heat transfer is applied in processes where high heat flux is needed to be removed i.e., nuclear power plant [3,4], desalination [5,6], or where space is confined such as electronic cooling and thermal management of data centers [7][8][9][10], thermal management of batteries [11], heat pipes [12,13] and microfluidic systems [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

2018

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Nucleate boiling is a phase change heat transfer process with a wide range of applications i.e., steam power plants, thermal desalination, heat pipes, domestic heating and cooling, refrigeration and air-conditioning, electronic cooling, cooling of turbo-machinery, waste heat recovery and much more. Due to its quite broad range of applications, any improvement in this area leads to significant economic, environmental and energy efficiency outcomes. This paper presents a comprehensive review and critical analysis on the recent developments in the area of micro-nano scale coating technologies, materials, and their applications for modification of surface geometry and chemistry, which play an important role in the enhancement of nucleate boiling heat transfer. In many industrial applications boiling is a surface phenomenon, which depends upon its variables such as surface area, thermal conductivity, wettability, porosity, and roughness. Compared to subtractive methods, the surface coating is more versatile in material selection, simple, quick, robust in implementation and is quite functional to apply to already installed systems. The present status of these techniques for boiling heat transfer enhancement, along with their future challenges, enhancement potentials, limitations, and their possible industrial implementation are also discussed in this paper.

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Section: Introductionmentioning

confidence: 99%

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

2018

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“…In contrast to the conventional heat pipes as shown in Figure 1, the pulsating heat pipe (PHP) contains a wickless design with aligned serpentine tube configuration. The heat transportation in a conventional heat pipe is accomplished through liquid evaporation at the heat source followed by condensation at the heat sink, and finally the condensate liquid moves back to the evaporator via wick structures through the utilization of capillary force [1][2][3]. Unlike conventional heat pipes, the PHP is filled with more working fluid.…”

Section: Introductionmentioning

confidence: 99%

A Novel Thermal Module with 3-D Configuration Pulsating Heat Pipe for High-Flux Applications

Tseng

Wong

et al. 2018

Energies

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A pulsating heat pipe (PHP) contains a wickless design with aligned serpentine tube configuration whose simple structure offers a comparatively easy manufacturing capability. The bends with large curvature are often used for serpentine PHPs. This eventually results in a decline in effective contact surface area between evaporator/condenser and PHP circuitry, thereby impairing the benefit of the wickless design of a PHP. A novel thermal module featuring a 3-D configuration pulsating heat pipe, an evaporator, and a fin-and-tube condenser is proposed to tackle the high-flux application. Methanol is used as the working fluid with a filling ratio of around 60%. Test results indicate the thermal resistance of the proposed module varies from 0.148 K/W to 0.0595 K/W when the supplied power changes from 100 to 1000 W. The proposed thermal module can handle a supplied power up to 1 kW and the corresponding power or heat flux is much higher than any existing literatures.

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“…It is important to shrink the carbon footprint by reducing the energy use and the irreversibilities due to heating and friction, because the energy costs are going up continuously. This reduction can be obtained by using heat exchangers or by heat pipes [1,2]. Heat pipe is a heat transfer device that allows a high heat transfer between the evaporator and condenser during the liquid-vapor *Sorumlu yazar (Corresponding Author) e-posta : engin.ozbas@omu.edu.tr phase change of the fluid [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Thermal Performance and Pressure Differences of Different Working Fluids in Two-phase Closed Thermosyphons Using Solar Energy

Özbaş¹

2018

Journal of Polytechnic

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ÖZFarklı çalışma akışkanları ile doldurulan yerçekimi destekli ısı borusunun basınç dağılımı ve termal performansının araştırılması için deneysel bir çalışma yapılmıştır. Farklı kaynama noktasına, yoğunluğa ve viskoziteye sahip olan metanol, su ve Mono-EtilenGlikol (MEG), çalışma sıvıları olarak seçilmiştir. Üç ısı borusu için deneysel bir düzenek tasarlanmış ve buharlaştırıcı bölümünün ısıtılması güneş enerjisi ile sağlanmıştır. Isı borusunun basınç ve sıcaklık dağılımları için boru yüzeyineden gerekli ölçümler yapılmıştır. Yüksek kaynama noktasına sahip saf antifriz ile termosifon tipi ısı borularında yaygın olarak kullanılan su ve metanol çalışma akışkanı olarak seçilmiştir. Experimental Study of Thermal Performance and Pressure Differences of Different Working Fluids in Two-phase Closed Thermosyphons Using Solar Energy ABSTRACTAn experimental study is carried out to investigate the pressure distribution and thermal performance of gravity assisted heat pipe charged with different working fluids. Methanol, water and Mono-Ethylene-Glycol (MEG) are chosen as working fluids which have different boiling point, density and viscosity. An experimental test apparatus is designed and produced including three heat pipes that heat input on the evaporator section are provided by solar energy. Measurements are conducted on the heat pipe surface for pressure and temperature variations. Pure antifreeze is chosen as working fluid, due to its high boiling point, along with water and methanol which are widely used in thermosyphon type heat pipes. Heat pipes are put into parabolic focused vacuumed glass tube and operated by solar energy for 11 days in order to achieve high temperatures. Data taken from 06.30 to 18.30 is taken into consideration for experimental results. Experimental results are evaluated for two days as (i) sunny and (ii) cloudy days by choosing days with the highest and lowest solar radiation. (i) As for the sunny day, the highest storage water temperatures for methanol, water and antifreeze were 90.0°C, 83.5°C and 86.7°C and the pressure values were 6.7 bar, 1.6 bar and 1.9 bar respectively. (ii) And for the cloudy day, the respective values of temperature and pressure were measured as; 43.9°C, 39.3°C, 29.0°C, and 2.0 bar, 0.2 bar and -0.3 bar.

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Heat utilisation technologies: A critical review of heat pipes

Cited by 143 publications

References 131 publications

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review

A Novel Thermal Module with 3-D Configuration Pulsating Heat Pipe for High-Flux Applications

Experimental Study of Thermal Performance and Pressure Differences of Different Working Fluids in Two-phase Closed Thermosyphons Using Solar Energy

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