Refine Your Search

Search Results

Viewing 1 to 4 of 4
Technical Paper

A Two-Phase Fluid Pump for Use in Microgravity Environments

1999-07-12
1999-01-1979
The two-phase pump assembly (TPPA) supports advanced thermal control systems (TCS) being developed for future orbital and deep space missions that continuously demand technological advancements to reduce cost, schedule, size, and weight. The TCS provides cooling to onboard personnel and systems by utilizing a coolant in which the working fluid undergoes vaporization and condensation while circulating in the coolant fluid loop. The considerable latent heat associated with these liquid-vapor phase transitions allows the working fluid to absorb and transport a given amount of heat energy with a significantly reduced coolant flow rate resulting in a smaller system size, volume, and mass. Properly designed heat exchangers which utilize boiling and condensation phase transitions can be made smaller and lighter than single-phase systems for a given heat dissipation load.
Technical Paper

The Continuing Evolution of the C-130 Environmental Control System

1999-07-12
1999-01-2163
The vast array of C-130 applications demand a variety of air conditioning solutions to meet the specific needs of each variant and its user. Existing C-130′s are often reconfigured for special use such as airborne early warning and control (AEW&C), electronic surveillance, or armed reconnaissance, or just upgraded to current flight standards where new equipment is added to the aircraft that significantly increases the heat load on the air conditioning system. These factors dictate the need for high-, middle-, and low-end solutions to deliver the increased cooling capacity required at a price each user can afford. This paper will recap the evolution of the C-130 environmental control system (ECS) to date, summarize current improvement efforts, and suggest future ECS developments.
Technical Paper

A Thermal Control System Dual-Membrane Gas Trap for the International Space Station

1997-07-01
972410
The dual membrane gas trap filter is utilized in the internal thermal control system (ITCS) as part of the pump package assembly to remove non-condensed gases from the ITCS coolant. This improves pump performance and prevents pump cavitation. The gas trap also provides the capability to vent air that is Ingested into the ITCS during routine maintenance and replacement of the International Space Station (ISS) system orbital replacement units. The gas trap is composed of two types of membranes that are formed into a cylindrical module and then encased within a titanium housing. The non-condensed gas that is captured is then allowed to escape through a vent tube in the gas trap housing.
Technical Paper

Columbus Orbital Facility Condensing Heat Exchanger and Filter Assembly

1997-07-01
972409
Space environmental control systems must control cabin temperature and humidity. This can be achieved by transferring the heat load to a circulating coolant, condensing the humidity, and separating the condensate from the air stream. In addition, environmental control systems may be required to remove particulate matter from the air stream. An assembly comprised of a filter, a condensing heat exchanger, a thermal control valve, and a liquid carryover sensor, is used to achieve all these requirements. A condensing heat exchanger and filter assembly (CHXFA) is being developed and manufactured by SECAN/AlliedSignal under a contract from Dornier Daimler-Benz as part of a European Space Agency program. The CHXFA is part of the environmental control system of the Columbus Orbital Facility (COF), the European laboratory module of the International Space Station (ISS).
X