Greenbelt MD (SPX) Mar 01, 2011
It may seem illogical, but boiling is a very efficient way to cool engineering components and systems used in the extreme environments of space.
An experiment to gain a basic understanding of this phenomena launched to the International Space Station on space shuttle Discovery Feb. 24. The Nucleate Pool Boiling Experiment, or NPBX, is one of two experiments in the new Boiling eXperiment Facility, or BXF.
Nucleate boiling is bubble growth from a heated surface and the subsequent detachment of the bubble to a cooler surrounding liquid. As a result, these bubbles can efficiently transfer energy from the boiling surface into the surrounding fluid.
This investigation provides an understanding of heat transfer and vapor removal processes that happen during nucleate boiling in microgravity. Researchers will glean information to better design and operate space systems that use boiling for efficient heat removal.
Bubbles in microgravity grow to different sizes than on Earth. This experiment will focus on the dynamics of single and multiple bubbles and the associated heat transfer.
NPBX uses a polished aluminum wafer, powered by heaters bonded to its backside, and five fabricated cavities that can be controlled individually. The experiment will study single and/or multiple bubbles generated at these cavities.
It will measure the power supplied to each heater group, and cameras will record the bubble dynamics. Analysis of the heater power data and recorded images will allow investigators to determine how bubble dynamics and heat transfer differ in microgravity.
"With boiling, the size and weight of heat exchange equipment used in space systems can be significantly reduced," said Vijay Dhir, the experiment's principal investigator at the University of California, Los Angeles.
"Boiling and multiphase heat transfer is an enabling technology for space exploration missions including storage and handling of cryogenic, or extremely low temperature liquids, life support systems, power generation and thermal management."
"The cost of transporting equipment to space depends on the size and weight of the equipment," added David Chao, the project scientist from NASA's Glenn Research Center in Cleveland. "The knowledge base that will be developed through the experiment will give us the capability to achieve cooling of various components and systems used in space in an efficient manner and could lead to smaller and lighter spacecraft."
Share This Article With Planet Earth
Station at NASA
Station and More at Roscosmos
S.P. Korolev RSC Energia
Watch NASA TV via Space.TV
Space Station News at Space-Travel.Com
Full house at space station as Discovery docks
Washington (AFP) Feb 26, 2011
The US shuttle Discovery docked Saturday for its final visit at the orbiting International Space Station, where all five of the world's participating space agencies now have vehicles or equipment. "This is the first time all visiting vehicles have something represented," NASA mission control in Houston said, after the oldest and most heavily traveled US shuttle linked up with the space outpo ... read more
NASA Assessing New Launch Dates For The Glory Mission|
Successful Launch Of REXUS 9
24 hour delay for launch of NASA satellite
SpaceX to focus on astronaut capsule
Russia To Probe Major Planets Before 2023
Advanced NASA Instrument Gets Close-up On Mars Rocks
Good Health Report After Hiatus In Communications
Experiment volunteers take 2nd 'walk on Mars'
The Great Moonbuggy Race
Venus And Crescent Moon Pair Up At Dawn
84 Student Teams Set to Roll At 18th Annual NASA Great Moonbuggy Race
Google Lunar X Prize Roster Reaches 29 Teams
Can WISE Find The Hypothetical Tyche In Distant Oort Cloud
Theory: Solar system has another planet
Launch Plus Five Years: A Ways Traveled, A Ways To Go
Mission To Pluto And Beyond Marks 10 Years Since Project Inception
Planet Formation In Action
'Missing' element gives planet birth clues
'Wandering' planets may have water, life
Back To The Roots Of The Solar System
Russia Grounds Launches Of Rokot Carrier Rocket
The First Stage Of Project On Mes-System Mcis Fulfilled
ISRO Tests Rocket Motor, Delays Satellite Launch
University of Ulster Launches Rocket Project with Japan Space Agency
China Mars probe set for November launch
Shenzhou 8 Mission Could Top Three Weeks
U.S. wary of China space weapons
Slow progress in U.S.-China space efforts
PS1 Telescope Establishes Near-Earth Asteroid Discovery Record
Record number of asteroids spotted
NASA Releases Images Of Man-Made Crater On Comet
Spectacular Flyby Of Comet Tempel 1 Tests Lockheed Built Spacecraft
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|