Intensification of heat exchange in the condensation zone of centrifugal heat pipes

1984 ◽  
Vol 46 (4) ◽  
pp. 382-387
Author(s):  
L. L. Vasil'ev ◽  
V. Kalita ◽  
V. V. Khrolenok
Keyword(s):  
Heat Exchange ◽  
Heat Pipes ◽  
Condensation Zone ◽  
Intensification Of Heat Exchange

scholarly journals Contact thermal resistance of capillary structures of heat pipes in heat-exchange systems of spacecrafts and helioenergetics

2009 ◽  
Vol 15 (1) ◽  
pp. 75-79
Author(s):  
A.G. Kostornov ◽  
◽  
A.A. Shapoval ◽  
G.A. Frolov ◽  
I.V. Shapoval ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Thermal Resistance ◽  
Heat Pipes ◽  
Contact Thermal Resistance

scholarly journals The influence of the charge shape on heat exchange of a recessed nozzle

2021 ◽  
Vol 2057 (1) ◽  
pp. 012013
Author(s):  
B Ya Benderskiy ◽  
A A Chernova
Keyword(s):  
Heat Exchange ◽  
Power Plant ◽  
Combustion Products ◽  
Triangular Form ◽  
Topological Features ◽  
Exchange Processes ◽  
Charge Shape ◽  
Intensification Of Heat Exchange ◽  
Thermally Conductive ◽  
Control Volumes

Abstract The paper deals with the numerical simulation of the flow of thermally conductive viscous gaseous combustion products in the flow paths of a power plant. The influence of the shape of the mass supply surface on the gas dynamics and heat exchange near the recessed nozzle of the power plant is investigated. The coupled problem of heat exchange is solved by the method of control volumes. It is shown that the compensator geometry determines the localization of both the topological features of the flow near the recessed nozzle and the position of local maximums of the heat transfer coefficient. It has been revealed that The use of a channel with a star-shaped cross section and a triangular form of compensator rays leads to an intensification of heat exchange processes near a recessed nozzle.

Heat-Exchange Technology, Heat Pipes

2000 ◽  
Author(s):  
Walter B. Bienert ◽  
Donald M. Ernst ◽  
G. Yale Eastman
Keyword(s):  
Heat Exchange ◽  
Heat Pipes

scholarly journals Horizontal earth-air heat exchanger for preheating external air in the mechanical ventilation system

2018 ◽  
Vol 13 (1) ◽  
pp. 71-76
Author(s):  
Vasyl Zhelykh ◽  
Olena Savchenko ◽  
Vadym Matusevych
Keyword(s):  
Heat Transfer ◽  
Mechanical Ventilation ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Heat Exchangers ◽  
Convective Heat Transfer Coefficient ◽  
Ventilation System ◽  
Heat Pipes ◽  
Heat Exchanger Tube ◽  
Exchanger Tube

Abstract To save traditional energy sources in mechanical ventilation systems, it is advisable to use low-energy ground energy for preheating or cooling the outside air. Heat exchange between ground and outside air occurs in ground heat exchangers. Many factors influence the process of heat transfer between air in the heat exchanger and the ground, in particular geological and climatic parameters of the construction site, parameters of the ventilation air in the projected house, physical and geometric parameters of the heat exchanger tube. Part of the parameters when designing a ventilation system with earth-air heat exchangers couldn’t be changed. The one of the factors, the change which directly affects the process of heat transfer between ground and air, is convective heat transfer coefficient from the internal surface of the heat exchanger tube. In this article the designs of a horizontal earthair heat exchanger with heat pipes was proposed. The use of heat pipes in designs of a horizontal heat exchanger allows intensification of the process of heat exchange by turbulence of air flow inside the heat exchanger. Besides this, additionally heat transfer from the ground to the air is carried out at the expense of heat transfer in the heat pipe itself.

scholarly journals Numerical Model of Heat Pipes as an Optimization Method of Heat Exchangers

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7647
Author(s):  
Łukasz Adrian ◽  
Szymon Szufa ◽  
Piotr Piersa ◽  
Filip Mikołajczyk
Keyword(s):  
Numerical Model ◽  
Heat Pipe ◽  
Heat Exchangers ◽  
Numerical Models ◽  
Heat Pipes ◽  
Primary Energy ◽  
Low Energy ◽  
New Findings ◽  
Intensification Of Heat Exchange ◽  
Building Engineering

This paper presents research results on heat pipe numerical models as optimization of heat pipe heat exchangers for intensification of heat exchange processes and the creation of heat exchangers with high efficiency while reducing their dimensions. This work and results will allow for the extension of their application in passive and low-energy construction. New findings will provide a broader understanding of how heat pipes work and discover their potential to intensify heat transfer processes, heat recovery and the development of low-energy building engineering. The need to conduct research and analyses on the subject of this study is conditioned by the need to save primary energy in both construction engineering and industry. The need to save primary energy and reduce emissions of carbon dioxide and other pollutants has been imposed on the EU Member States through multiple directives and regulations. The presented numerical model of the heat pipe and the results of computer simulations are identical to the experimental results for all tested heat pipe geometries, the presented working factors and their best degrees of filling.

scholarly journals Mathematical Modeling of Hydraulic Resistance in Pipes With Rough Walls

2018 ◽  
Vol 1 (1) ◽  
pp. 74
Author(s):  
Lobanov Lgor Evgenjevich
Keyword(s):  
Mathematical Modeling ◽  
Heat Exchange ◽  
Hydraulic Resistance ◽  
Rough Walls ◽  
Intensification Of Heat Exchange ◽  
Extended Range

In recent years, the numbers of patents have been devoted to the development of rough pipes. The technique theoretical settlement determine of factor of hydraulic resistance for round pipes with rough walls is developed on the basis of a principle of a superposition of complete viscosity in turbulent a layer mainly distinguished from the existing theories. The received results of account for the extended range of determining parameters much distinguished from appropriate given for round pipes with turbulizers, specify a level и intensification of heat exchange.

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