Experimental investigations of flat T-shaped copper and titanium heat pipes

Author(s):  
Denis A. Nesterov ◽  
Valery A. Derevyanko ◽  
Sergey B. Suntsov
2007 ◽  
Vol 60 (3) ◽  
pp. 107-119 ◽  
Author(s):  
Balram Suman

The review presents an update of the work done in the micro heat pipe research and development, with an aim to give updated detailed knowledge to individuals new to the field, as well as to those already working in this area. Presented here is a summary of the recent advances in these devices occurring since the early 1990s. The following review describes the historical development of these devices, along with a review of the steady state and the transient models, sensitivity analyses, recent experimental investigations and fabrication techniques. The critical heat input, dryout length, fill charge, various heat pipe limitations and design have also been discussed in brief. Finally, future research and areas in which additional information is required are identified and delineated. This article has 204 references.


2013 ◽  
Vol 7 (2) ◽  
pp. 161-173 ◽  
Author(s):  
Xin Tang ◽  
Lili Sha ◽  
Hua Zhang ◽  
Yonglin Ju

2016 ◽  
Vol 138 (4) ◽  
Author(s):  
Daniel Hoeftberger ◽  
Juergen Karl

The carbonate looping process using the reversible calcination/carbonation reaction of limestone is a promising way to reduce CO2 emissions of fossil fired power plants. This paper describes the concept of an indirectly heated version of this process in which heat pipes accomplish the heat transfer from an air-blown fluidized bed combustor to a bubbling fluidized bed calciner. It defines the calciner's specific heat demand which is a pendant to the heating value of coal. The dimensioning depends on the processes inside heat pipes as well as heat transfer of immersed heating surfaces. Experimental investigations in an electrically heated batch reactor with a similar pipe grid provide heat transfer coefficients under calcination conditions.


Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6547
Author(s):  
Łukasz Amanowicz

Renewable energy sources for the purpose of heating buildings cooperate perfectly with so-called low-temperature heating systems. Water loop surface heating systems had been thoroughly tested. In contrast, thermal performance of wall panels with heat pipes have not been fully recognized, yet. The determination of the thermal power as well as the control of panels thermal performance cannot be performed with the methods developed for water loop systems. In this paper, the novel heating panels with heat pipes were tested to analyze the possibility of controlling their performance by changing the mass flowrate of heating water and its temperature. Specific heating power of the investigated panels varies from 16.9 W/m2 to 93.8 W/m2 when supplying a water temperature ranging from 35 °C to 65 °C and mass flowrate from 10 g/s to 47.5 g/s. Investigations revealed that the thermal performance of the panels is more sensitive to the changes of temperature than to the changes of mass flowrate of supplying water, and thus, should be controlled by changing the supply water temperature at low mass flowrates to obtain a low energy usage of pumps (diminished pressure losses) and good quality of controlling.


2016 ◽  
Author(s):  
Enguang Liu ◽  
Fan Yang ◽  
YongBin Mu ◽  
Yinong Wu

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