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Regulative Characteristic of Methanol - Copper Heat Pipes for Asteroid Lander "MASCOT"

Baturkin, Volodymyr and Feidelheimer, Vitali and Sasaki, Kaname and Mikulz, Eugen and Ho, Tra-Mi (2020) Regulative Characteristic of Methanol - Copper Heat Pipes for Asteroid Lander "MASCOT". Journal of Heat Transfer, 142 (5), 051801-1. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4046443. ISSN 0022-1481.

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Official URL: https://asmedigitalcollection.asme.org/heattransfer/article-abstract/142/5/051801/1074765/Regulative-Characteristic-of-Methanol-Copper-Heat?redirectedFrom=fulltext


Variable conductance heat pipes (VCHPs) are the main part of the MASCOT (mobile asteroid surface SCOuT) lander thermal control system (TCS). They provide variable thermal conductivity by utilizing the heat transfer limitations. This allows the heat pipes to act as thermal switches without additional constructive elements, thus leveraging the simple and compact design of conventional heat pipes. Two cylindrical methanol–copper heat pipes with shell length of 0.482 m and 0.438 m and external diameter of 0.006 m, having copper discrete metal fiber wick and copper shell were constructed and verified in the temperature range between - 75 and +60 C. The purpose is to apply this design into the MASCOT TCS and to investigate the heat pipes’ regulative characteristics and heat transfer limitations. VCHPs show a change of thermal resistivity from 70 K/W at a heat sink temperature of - 60 C, to 0.8 K/W at a heat sink temperature of +60 C; with an obtained maximal heat transfer rate of 5 W and 16 W, respectively. It is found that the switching effect of the heat pipes is governed by the sonic velocity limitation, the saturation vapor pressure of the working fluid, and the maximal capillary pressure of the wick. The operation of the heat pipes as the part of the TCS has confirmed their variable thermal properties

Item URL in elib:https://elib.dlr.de/135985/
Document Type:Article
Title:Regulative Characteristic of Methanol - Copper Heat Pipes for Asteroid Lander "MASCOT"
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Sasaki, KanameUNSPECIFIEDhttps://orcid.org/0000-0003-0365-4539UNSPECIFIED
Ho, Tra-MiUNSPECIFIEDhttps://orcid.org/0000-0003-3378-3227UNSPECIFIED
Date:May 2020
Journal or Publication Title:Journal of Heat Transfer
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:051801-1
EditorsEmailEditor's ORCID iDORCID Put Code
Portonovo, S. AyyaswamyThe Americal Society of Mechanical Engineers. ASME Digital collectionUNSPECIFIEDUNSPECIFIED
Publisher:American Society of Mechanical Engineers (ASME)
Series Name:ASME. Digital collection
Keywords:heat pipes, cooper – methanol, metal fiber wick, heat transfer limitations,variable conductance
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Project Mascot (Bus), Vorhaben Carbotherm (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Mechanic and Thermal Systems
Deposited By: Baturkin, Volodymyr
Deposited On:14 Sep 2020 11:57
Last Modified:28 Mar 2023 23:56

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