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(PDF) Basic Principles of Heat Pipes and History

In terms of thermal conduction, a heat pipe is designed to have very high thermal. conductance. 4 1 Basic Principles of Heat Pipes and History. Heat is transported from the heat source (evaporator Concentrating Solar Power:Advanced Projects Offering Low Ceramatec, Inc. Location:Salt Lake City, UT SunShot Award Amount:$2,348,780 Awardee Cost Share:$1,476,706 Project Summary:Ceramatec Inc. and Georgia Institute of Technology will develop and demonstrate a modular sodium ion expansion power block for distributed CSP with an estimated efficiency in excess of 50%. These generators will be most similar to thermoelectric generators,

Ductile Iron Data - Section 3 - Part 2

Density. The generally accepted value for the room temperature density of Ductile Iron is 7.1 g/CM 3. Density is affected primarily by the percentage of graphitized carbon, with densities varying from 6.8 g/CM 3 to 7.4 g/CM 3 for high carbon ferritic and low carbon pearlitic irons respectively. Heat Pipe Used Heat Boiler - cambridgeholidaylets.ukHigh Temperature Pipe Sodium Heat Pipe Transfer ACT, Inc. High temp pipe materials of construction are typically Alloy 600 for Cesium, Potassium, and Sodium. ACT also manufactures a Haynes 230/Sodium heat pipe for extended operation near 1100°C because of the significantly higher creep strength. Austenitic stainless steels can be used Heat Pipe for Aerospace ApplicationsAn OverviewThe paper presents an overview of heat pipes, especially those used in different space missions. Historical perspectives, principles of operations, types of heat pipes are discussed. Several factors have contributed to the science and technology of the present state-of-Art heat pipe leading to the development of loop heat pipes, micro and miniature heat pipes and micro loop heat pipes.


Specific benefits of heat pipes are:1) heat pipes have enormously more heat transfer capability than other methods on a weight and size basis, 2) heat pipes permit configuration flexibility in contact areas with heat sources and heat sinks, 3) heat can be transported over considerable distances with insignificant temperature drop, 4) capillary pumping in the wick is generated by the heat transfer process and requires no other power or moving parts to pump the condensate, and 5) heat pipes Nuclear and Emerging Technologies for Space (NETS) Prepare for flight test of titanium -water heat pipe radiator on ISS to verify Zero -G performance . On-orbit test of variable conductance heat pipe radiator under steady-state & transient conditions Full-scale nuclear test of reactor core, sodium heat pipes, and Stirling convertors at prototypic operating conditions . Spherical solar energy collector - Stirling Thermal Motors In applications where sodium is used as a heat pipe working fluid at a temperature of about 800° C., the pressure within collector 10 is about one-half atmosphere. Due to this low pressure within collector 10, atmospheric pressure acts on the entire structure and

Thermal Management Solutions Heat Pipes

ACT is the only U.S.-based Heat Pipe manufacturer that routinely ships Heat Pipe products for terrestrial, spacecraft, and high-temperature applications. Our Heat Exchanger products are deployed all over the world to improve energy efficiencies of building HVAC systems and industrial processes. US3537514A - Heat pipe for low thermal conductivity US3537514A US3537514DA US3537514A US 3537514 A US3537514 A US 3537514A US 3537514D A US3537514D A US 3537514DA US 3537514 A US3537514 A US 3537514A Authority US United States Prior art keywords heat liquid heat pipe condenser capillary Prior art date 1969-03-12 Legal status (The legal status is an assumption and is not a legal conclusion. Variable Conductance Heat Pipe Cooling of Stirling mission. An alkali-metal Variable Conductance Heat Pipe (VCHP) can be used to passively allow multiple stops and restarts of the Stirling convertor. In a previous NASA SBIR Program, Advanced Cooling Technologies, Inc. (ACT) developed a series of sodium VCHPs as backup cooling systems for Stirling RPS. The operation of these

ium-Water Heat Pipe Radiators for Space Fission Power

Jun 30, 2020 · The thermal management system of Kilopower system involves two types of heat pipes:high temperature alkali metal heat pipes that are used to transport thermal energy from the nuclear reactor to the Stirling convertors hot end and titanium water heat pipes that are used to remove the waste heat from the convertors cold end and transport it to the radiators for ultimate rejection.An Overview of Long Duration Sodium Heat Pipe Tests - An Overview of Long Duration Sodium Heat Pipe Tests High temperature heat pipes are being evaluated for use in energy conversion applications such as fuel cells, gas turbine re-combustors, and Stirling cycle heat sources; with the resurgence of space nuclear power, additional applications include reactor heat removal elements and radiator elements. . Long operating life and reliable