Applications of the Heat Pipe

Reay, David; Kew, P.A.; McGlen, Ryan J.

doi:10.1016/b978-075066754-8/50011-7

Cited by 31 publications

(60 citation statements)

References 47 publications

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“…It was found that the proposed mathematical model successfully reproduces the complex phenomena of heat transfer and steam flow of the coolant in the thermosyphon. The study results obtained correlate well with the theoretical and experimental data [7]. The results of an experimental study of methanol boiling in a closed biphasic thermosyphon are given in [8].…”

Section: Introductionsupporting

confidence: 75%

Mathematical Modelling of Force Convection in a Two–Phase Thermosyphon in Conjugate Formulation

Nurpeiis

Nee

2016

EPJ Web of Conferences

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Abstract.A nonlinear non-stationary problem of the conductive-convective heat transfer is addressed (under forced convection conditions) in the thermosyphon of rectangular crosssection. The thermal energy supply is carried out through the lower horizontal border. The mathematical model is formulated in dimensionless variables of "velocity vorticity vectorcurrent function -temperature". The current and temperature distribution lines are obtained, illustrating the effect of the Reynolds number on the thermodynamic structures formation in the analyzed object.

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Section: Introductionsupporting

confidence: 75%

Mathematical Modelling of Force Convection in a Two–Phase Thermosyphon in Conjugate Formulation

Nurpeiis

Nee

2016

EPJ Web of Conferences

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“…This type of liquid possesses unique characteristics [7,8], namely high latent heat, and adequate boiling temperature as well as good compatibleility with heat pipe materials (cooper and aluminium) and is, therefore, an ideal choice for heat pipe operation.…”

Section: Introductionmentioning

confidence: 99%

“…They are therefore able to transfer large amounts of heat for distances up to several metres, or to several tens of metres in a horizontal (vertical) position through the effect of capillary pumping or gravity [6,7]. Due to this feature the loop heat pipes are ideally suited for use in building hot water systems, which allow solar heat to be collected from an outer façade area, transported to a heat exchanger at the inside of the building, and further transferred to the water flowing across the exchanger.…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of the performance of a novel loop heat pipe solar water heating system for use in Beijing, China

Zhao

Wang

2010

Applied Thermal Engineering

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A novel loop heat pipe (LHP) solar water heating system for typical apartment buildings in Beijing was designed to enable effective collection of solar heat, distance transport, and efficient conversion of solar heat into hot water. Taking consideration of the heat balances occurring in various parts of the loop, such as the solar absorber, heat pipe loop, heat exchanger and storage tank, a computer model was developed to investigate the thermal performance of the system. With the specified system structure, the efficiency of the solar system was found to be a function of its operational characteristics -working temperature of the loop heat pipe, water flow rate across the heat exchanger, and external parameters, including ambient temperature, temperature of water across the exchanger and solar radiation. The relationship between the efficiency of the system and these parameters was established, analysed and discussed in detail. The study suggested that the loop heat pipe should be operated at around 72 o C and the water across the heat exchanger should be maintained at 5.1 l/min. Any variation in system structure, i.e., glazing cover and height difference between the absorber and heat exchanger, would lead to different system performance.The glazing covers could be made using either borosilicate or polycarbonate, but borosilicate is to be preferred as it performs better and achieves higher efficiency at higher temperature operation.The height difference between the absorber and heat exchanger in the design was 1.9 m which is an adequate distance causing no constraint to heat pipe heat transfer. These simulation results were validated with the primary testing results. wi -wicks;wp -water pipe between the heat exchanger and storage tank;

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“…The idea of heat pipe was first introduced by the Perkins family in the nineteen century for which they receive the UK Patent No. 7059 [1] for using small quantity of water in Perkins tube and operating on a two phase cycle. Later on this concept was more developed by Gaugler in 1942.…”

Section: Introductionmentioning

confidence: 99%