Keyword: Heat transfer

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Briefs: Mechanical & Fluid Systems

Improvements in brine water recovery are critical to advancing NASA’s goals for human exploration of space. Water recovery systems must minimize the need for new supplies of clean water by closing the water...

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Briefs: Mechanical & Fluid Systems
Porous Media Jacket for Use in Regeneratively Cooled Rocket Engines

A paper describes a method for regeneratively cooling worst-case gas-phase thrusters using porous media integrated into a regenerative cooling jacket. The enhanced surface area in the jacket compensates for the much lower effective heat transfer coefficients of gases as compared...

Briefs: Materials
Touch Temperature Coating for Electrical Equipment on Spacecraft

A coating has been developed that can be applied to spacecraft equipment to significantly increase the allowable touch temperature limit, while only marginally degrading the heat transfer to the environment.

Articles: Lighting

When it comes to high-power lighting applications in the military and harsh industrial environments, reliability and efficiency are key features to consider. To maximize both of these...

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Briefs: Electronics & Computers
Wireless Integrated Microelectronic Vacuum Sensor System

NASA Stennis Space Center’s (SSC’s) large rocket engine test facility requires the use of liquid propellants, including the use of cryogenic fluids like liquid hydrogen as fuel, and liquid oxygen as an oxidizer (gases which have been liquefied at very low temperatures). These fluids...

Briefs: Information Technology

Aircraft performance can be compromised when ice forms on aircraft surfaces such as the wings, nacelles, sensors, and control systems. This can cause safety issues due to significant changes...

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Application Briefs: Photonics/Optics

Increasing power densities and decreasing transistor dimensions are hallmarks of many of today’s semiconductor devices, including high-voltage power transistors, laser diodes, and RF power amplifiers....

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Briefs: Physical Sciences

The design and application of LED (Light Emitting Diode) lighting solutions provides new opportunities for thermofluid- mechanical modeling enabled by multiphysics analysis. A coupled...

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Briefs: Manufacturing & Prototyping

A design of an Active Magnetic Regenerative Refrigeration (AMRR) system has been developed for space applications. It uses an innovative 3He cryogenic...

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Application Briefs: Energy

The instruments aboard NASA’s Mars Science Laboratory “Curiosity” rover receive their power from a radioisotope system assembled and tested at Idaho National Laboratory. The Multi- Mission...

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Briefs: Physical Sciences
ESD Test Apparatus for Soldering Irons

ESDA (Electrostatic Discharge Association) ESD STM 13.1-2000 requires frequent testing of the voltage leakage from the tip of a soldering iron and the resistance from the tip of the soldering iron to the common point ground. Without this test apparatus, the process is time-consuming and requires several...

Briefs: Mechanical & Fluid Systems
Optimized Radiator Geometries for Hot Lunar Thermal Environments

The optimum radiator configuration in hot lunar thermal environments is one in which the radiator is parallel to the ground and has no view to the hot lunar surface. However, typical spacecraft configurations have limited real estate available for top-mounted radiators, resulting...

Briefs: Physical Sciences
Spacecraft Crew Cabin Condensation Control

A report discusses a new technique to prevent condensation on the cabin walls of manned spacecraft exposed to the cold environment of space, as such condensation could lead to free water in the cabin. This could facilitate the growth of mold and bacteria, and could lead to oxidation and weakening of the...

Briefs: Electronics & Computers

Planar, semiconductor heat arrays have been previously proposed and developed; however, this design makes use of a novel, microscale black silicon wick structure that provides...

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Briefs: Mechanical & Fluid Systems

Next-generation heat-pipe radiator technologies are being developed at the NASA Glenn Research Center to provide advancements in heat-rejection systems for space power and...

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Briefs: Manufacturing & Prototyping
Composite With In Situ Plenums

A document describes a high-performance thermal distribution panel (TDP) concept using high-conductivity (>800 W/mK) macro composite skin with in situ heat pipes. The processing technologies proposed to build such a panel result in a one-piece, inseparable assembly with high conductance in both the X and Y...

Articles: Lighting

Though they are a relative latecomer to the world of lighting technology, light-emitting diodes (LEDs) are quickly making up for lost time. Since their invention in 1962, LEDs have been...

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Articles: Automotive

Having your car’s air conditioner lose its cool on a hot day can make for an uncomfortable ride. A breakdown in thermal control in space is far more than a matter of comfort; on the...

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Briefs: Mechanical & Fluid Systems

Future lunar landers and rovers will require variable thermal links that allow for heat rejection during the lunar daytime and passively prevent heat rejection during the...

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Briefs: Software

The controlled transfer of heat from a component to its surroundings is critical for the operation of many industrial processes. For example, cooling of electronics components is needed to maintain safe operation and...

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Briefs: Software

If carmakers could reduce the number, size, and weight of the components in there, better fuel economy would result. A case in point is the design and...

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Briefs: Materials
Nanoengineered Thermal Materials Based on Carbon Nanotube Array Composites

State-of-the-art integrated circuits (ICs) for microprocessors routinely dissipate power densities on the order of 50 W/cm2. This large power is due to the localized heating of ICs operating at high frequencies and must be managed for future highfrequency...

Techs for License: Lighting

Code 3’s TriCore is an LED-based optical lighting technology that is 2X brighter than other technology currently on the market using only 1/3 the power of conventional lighting systems, yielding...

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Application Briefs: Lighting

Las Vegas is best known for the bright lights of ‘The Strip’ but thanks to new LED fixtures from GE Lighting, the city’s surrounding streets are starting to take on a...

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Briefs: Software
Personal Computer Transport Analysis Program

The Personal Computer Transport Analysis Program (PCTAP) is C++ software used for analysis of thermal fluid systems. The program predicts thermal fluid system and component transients. The output consists of temperatures, flow rates, pressures, delta pressures, tank quantities, and gas quantities in...

Briefs: Physical Sciences

A gas containment vessel that is not in thermal equilibrium with the bulk gas can affect its temperature measurement. The physical nature of many gas...

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Briefs: Materials
Non-Toxic, Low-Freezing, Drop-In Replacement Heat Transfer Fluids

A non-toxic, non-flammable, low-freezing heat transfer fluid is being developed for drop-in replacement within current and future heat transfer loops currently using water or alcohol-based coolants. Numerous water-soluble compounds were down-selected and screened for...

Articles: Research Lab

Innovators at NASA’s Glenn Research Center design game-changing spaceflight technologies that advance exploration of our solar system. They have also established themselves as global leaders in aeronautics by...

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Briefs: Manufacturing & Prototyping
Technique for Configuring an Actively Cooled Thermal Shield in a Flight System

Broad area cooling shields are a massefficient alternative to conductively cooled thermal radiation shielding. The shield would actively intercept a large portion of incident thermal radiation and transport the heat away using cryogenic helium gas. The design concept...

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