Numerical analysis of a vertical double-pipe single-flow heat exchanger applied in an active cooling system for high-power LED street lights

2017 ◽  
Vol 195 ◽  
pp. 426-438 ◽  
Author(s):  
Gerd Schmid ◽  
Zun-Long Huang ◽  
Tai-Her Yang ◽  
Sih-Li Chen
Keyword(s):  
Heat Exchanger ◽  
Numerical Analysis ◽  
High Power ◽  
Cooling System ◽  
Active Cooling ◽  
High Power Led ◽  
Flow Heat ◽  
Double Pipe ◽  
Single Flow

Experimental Study of Heat Pipe Exchanger for High Power LED Cooling System

2011 ◽  
Vol 295-297 ◽  
pp. 1985-1988
Author(s):  
Yu Jun Gou ◽  
Zhong Liang Liu ◽  
Xiao Hui Zhong
Keyword(s):  
Heat Exchanger ◽  
Heat Pipe ◽  
High Power ◽  
Heat Dissipation ◽  
High Efficiency ◽  
Cooling System ◽  
Two Phase ◽  
High Power Led ◽  
New Type ◽  
Two Phase Heat Transfer

A new cooling concept for high power LED by combining the heat release of high power LED with two-phase heat transfer heat pipes was proposed, and in this study a new type of heat pipe with specific fins structure was developed. Through experimental results, we found the new heat pipe heat exchanger has the features of high efficiency of heat dissipation and compact construction which meets the demand of heat dissipation for high power LED. We also found the heat dissipation performance of the HP heat exchanger changed with the work angle.

Experimental Study of Effect Factors on Performance of Heat Dissipation of HP Heat Exchanger for LED Cooling System

2012 ◽  
Vol 490-495 ◽  
pp. 2530-2533
Author(s):  
Yun Jun Gou ◽  
Zhong Liang Liu ◽  
Chun Min Wang ◽  
Xiao Hui Zhong
Keyword(s):  
Heat Exchanger ◽  
High Power ◽  
Heat Dissipation ◽  
Environmental Temperature ◽  
Cooling System ◽  
Heat Pipes ◽  
Two Phase ◽  
High Power Led ◽  
Street Lamp ◽  
Two Phase Heat Transfer

A new cooling concept for high power LED street lamp by combining the heat release of high power LED with two-phase heat transfer heat pipes was proposed, and in this paper we study the effect of heat pipe numbers, fins structure and ambient temperature on the performance of heat dissipation of HP heat exchanger. Through experimental results, we found the heat pipes number plays a more importent role on the performance of heat dissipation than the fins material and the final surface temperature will increase with the environmental temperature.

Analysis of the efficiency of hydrocarbon propellant cooling using liquid nitrogen and a combination of recuperative heat exchangers

2020 ◽  
Author(s):  
A.A. Aleksandrov ◽  
I.V. Barmin ◽  
A.V. Zolin ◽  
V.V. Chugunkov
Keyword(s):  
Heat Exchanger ◽  
Liquid Nitrogen ◽  
Coming Out ◽  
Heat Exchangers ◽  
Cooling System ◽  
Design Parameters ◽  
Nitrogen Gas ◽  
Double Pipe ◽  
The Cost ◽  
Pipe Heat

The paper describes the propellant cooling system using liquid nitrogen and a combination of recuperative heat exchangers, including sections of the double pipe heat exchanger and a twisted heat exchanger located in a tank with antifreeze, cooled by nitrogen gas coming out of the sections of the double pipe heat exchanger. Mathematical models of cooling processes for two variants of movement of propellant and liquid nitrogen in the channels of the double pipe heat exchanger sections are considered. Their using makes it possible to analyze the efficiency of propellant cooling operations depending on its mass, design parameters of the system tanks and heat exchangers, consumption characteristics of nitrogen and propellant, as well as to predict the required mass of liquid nitrogen and the time of propellant cooling during the operation of launching complex propellant-feed systems. Calculated dependences and simulation results of propellant and antifreeze cooling in a tank with a twisted heat exchanger are presented. The influence of variants of arranging propellant cooling processes and liquid nitrogen consumption on the efficiency of the cooling system is analyzed. Comparing to the available systems the capability of reducing the cost of liquid nitrogen are identified as well as reducing time of the propellant cooling operations by means of equipping launch complexes.

Optimization and Active Control of the Underhood Cooling System: A Numerical Analysis

2010 ◽  
Author(s):  
Mahmoud Khaled ◽  
Fabien Harambat ◽  
Anthony Yammine ◽  
Hassan Peerhossaini
Keyword(s):  
Heat Exchanger ◽  
Numerical Analysis ◽  
Active Control ◽  
Heat Exchangers ◽  
Cooling System ◽  
Two Dimensional ◽  
System A ◽  
Computational Code ◽  
Cooling Module ◽  
Real Vehicle

Here numerical analysis is focused on optimizing the vehicle heat exchanger by varying the geometry in which it is integrated in the vehicle’s cooling system. This analysis also elucidates how one can affect the different parameters that influence heat exchanger performance in order to optimize their functioning, in relation to the geometry in which they are integrated. The two-dimensional computational code developed permits optimizing the performance of the cooling module by positioning different heat exchangers, in both driving and stop phases of the vehicle. The ultimate aim is to develop new approaches to controlling heat exchanger positions in a real vehicle cooling system.

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