Zobrazeno 1 - 10
of 21
pro vyhledávání: '"David B. Sarraf"'
Publikováno v:
Applied Thermal Engineering. 28:278-283
Three monoporous wicks with average powder diameters 60 μm, 300 μm, and 600 μm and five biporous wicks with average cluster (μm) to powder (μm) ratios and wick thickness (mm) 600/60/4, 300/60/4, 600/40/1, 300/60/1, and 300/40/1 were tested with
Publikováno v:
41st International Conference on Environmental Systems.
In a Variable Conductance Heat Pipe (VCHP), a Non-Condensable Gas (NCG) is added to the heat pipe to allow the conductance to vary. A Pressure Controlled Heat Pipe (PCHP) is a VCHP variant, where the heat pipe operation is controlled by varying eithe
Publikováno v:
AIP Conference Proceedings.
The TacSat‐4 micro‐satellite uses an aluminum/ammonia loop heat pipe (LHP) to transport 700 W of heat from the electronics to two radiator sections. In addition to the thermal requirements, there were additional specifications for the primary and
Autor:
Sanjida Tamanna, Richard W. Hoffman, Peter M. Dussinger, William G. Anderson, David B. Sarraf
Publikováno v:
6th International Energy Conversion Engineering Conference (IECEC).
Concentrating photovoltaic systems (CPV) utilize low cost optical elements such as Fresnel lens or mini-reflecting mirrors to concentrate the solar intensity to 200 to 1000 suns. The concentrated solar energy is delivered to the solar cell at up to 2
Publikováno v:
AIP Conference Proceedings.
This paper discusses the design and test of a pressure controlled heat pipe (PCHP) for spacecraft thermal management. The PCHP combines a conventional grooved aluminum‐ammonia heat pipe with a variable‐volume non‐condensable gas reservoir to cr
Autor:
Richard Bonner, John R. Hartenstine, William G. Anderson, Ivan E. Locci, David B. Sarraf, Peter M. Dussinger
Publikováno v:
5th International Energy Conversion Engineering Conference and Exhibit (IECEC).
There are a number of different applications that could use heat pipes or loop heat pipes (LHPs) in the intermediate temperature range of 450 to 725 K (170 to 450 C), including space nuclear power system radiators, fuel cells, and high temperature el
Publikováno v:
AIP Conference Proceedings.
There are a number of different applications that could use heat pipes or loop heat pipes (LHPs) in the intermediate temperature range of 450 to 750 K, including space nuclear power system radiators, and high temperature electronics cooling. Potentia
Autor:
David B. Sarraf, William G. Anderson
Publikováno v:
ASME 2007 InterPACK Conference, Volume 1.
Copper water heat pipes are a well-established solution for many conventional electronics cooling applications; however they have several problems when applied to high temperature electronics. The high vapor pressure of the working fluid combined wit
Autor:
David B. Sarraf
Publikováno v:
SAE Technical Paper Series.
Publikováno v:
4th International Energy Conversion Engineering Conference and Exhibit (IECEC).
Space nuclear systems require large area radiators to reject the unconverted heat to space. System optimizations with Brayton cycles lead to radiators with radiator temperatures in the 400 to 550 K range. To date, nearly all space radiator systems ha