elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Study of longitudinal heat transfer in low temperature heat pipes with axial grooves and discrete metal fibers for space thermal control systems

Baturkin, Volodymyr and Ho, Tra-Mi (2016) Study of longitudinal heat transfer in low temperature heat pipes with axial grooves and discrete metal fibers for space thermal control systems. In: Conference proceedings "14th International Conference on Simulation and Experiments in Heat transfer and its Applications. Heat Transfer 2016. Uneduted Papers", pp. 278-289. Wessex Institute, UK;Lund University, Sweden;WIT Transactions on Engineering Sciences. 14th International Conference on Simulation and Experiments in Heat Transfer and its Application, 07.-09.09.2016, Ancona, Italy.

[img] PDF
790kB

Official URL: http://www.witpress.com

Abstract

Development of space thermal control (TC) technique is tightly connected with achievements of heat pipe (HP) science and technology. The paper presents the experimental results of heat transfer for the following perspective HP designs with round cross section in wide range of operation parameters: saturation vapor temperature -70…+60 C, transferred heat power 0.5-100 W, axial heat flux density 10-250 W/cm2: a Copper – methanol HP with cooper discrete metal fiber capillary structure, external diameter 0.006 m, type – variable thermal conductance b Stainless steel – methanol HP with cooper discrete metal fiber capillary structure, external diameter 0.008 m, type- variable thermal conductance c Aluminum –ammonia HP with axial grooved capillary structure, external diameter 0.012 m, type- constant thermal conductance As characteristic parameter for comparison the ratio R=(T1-T2)/Q is used, where Q- transferred heat power, T1, T2 – averaged temperature of heat input and output zones of heat pipe. HPs “a” have shown essential impact of T2 of R, which varies from 60 K/W to 0.5 K/W. Physical basis of such behavior deals with changing of vapor flow regime in inner space and with the change of intensity of heat transfer by saturation vapor pressure. For HP “b” parameter R has variation from 90 K/W to 4 K/W. Physical basis of such behavior deals with creation of vapor –noncondensible gas boundary in coldest part of heat pipe and as the sequence, with variation of intensity of heat transfer. For HP “c” parameter R varies from 0.06 K/W to 0.045 K/W. Change of T2 has no essential impact of HP thermal resistance R. Comparison of longitudinal heat transfer characteristics of different types of heat pipes, obtained on representative quantity of tested units, allowed to define their functional abilities and duties in TC for different space applications.

Item URL in elib:https://elib.dlr.de/106103/
Document Type:Conference or Workshop Item (Speech)
Title:Study of longitudinal heat transfer in low temperature heat pipes with axial grooves and discrete metal fibers for space thermal control systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baturkin, Volodymyrvolodymyr.baturkin (at) dlr.deUNSPECIFIED
Ho, Tra-MiDLR-Bremen, tra-mi.ho (at) dlr.deUNSPECIFIED
Date:May 2016
Journal or Publication Title:Conference proceedings "14th International Conference on Simulation and Experiments in Heat transfer and its Applications. Heat Transfer 2016. Uneduted Papers"
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 278-289
Publisher:Wessex Institute, UK;Lund University, Sweden;WIT Transactions on Engineering Sciences
Series Name:WIT eLibrary (www.witpress.com)
Status:Published
Keywords:space, thermal control, heat pipe, study
Event Title:14th International Conference on Simulation and Experiments in Heat Transfer and its Application
Event Location:Ancona, Italy
Event Type:international Conference
Event Dates:07.-09.09.2016
Organizer:WESSEX INSTITUTE, UK and Lund University, Sweden
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Projekt Mascot (Bus)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Mechanic and Thermal Systems
Institute of Space Systems > Systems Engineering and Project Office
Deposited By: Baturkin, Volodymyr
Deposited On:28 Sep 2016 12:57
Last Modified:31 Jul 2019 20:03

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.