Effects of high-temperature, high-humidity environment on silicon solar cell contacts
Electrical and mechanical characteristics of solar cell contacts after exposure to high-temperature high-humidity environments
Berman, P. A.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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A precisely controlled, low range humidity system
Development of environmental control system for determining effects of relative humidity and dry heat on inactivation of microorganisms
Garst, D. M.↗
Analysis of radiosonde humidity errors based on BOMEX data
Lag correction procedure for radiosonde humidity measurement errors
Crutcher, H. L.↗
Analysis of a space photo of a humid and forested region - A case study of the Tennessee Valley Final report
Spaceborne photographic image interpretation to identify objects in humid and forested regions
Peplies, R. W.↗
Feasibility study of a humidity control and oxygen supply system utilizing a water vapor electrolysis unit
Design and tests of water vapor electrolysis cell for generating and regulating spacecraft oxygen and for controlling humidity
Huddleston, J. C.↗
The fundamental mechanism of humidity degradation in silver-titanium contacts
Solderless Ag-Ti solar cell contacts humidity degradation mechanism
Bishop, C. J.↗
Effects of humidity on the velocity of sound in air
Humidity effects on sound velocity in air at constant temperature and normal atmospheric pressure in lower audio frequency range
Harris, C. M.↗
Circadian rhythm of leaves of Phaseolus angularis plants grown in a controlled carbon dioxide and humidity environment
Circadian rhythm of leaves of Phaseolus angularis plants in controlled carbon dioxide and humidity environment
Alford, D. K.↗
Humidity resistant solar cell contacts
Gold-platinum solar cell contact is developed which does not exhibit chemical reactivity of titanium or porosity of silver. This contact offers excellent ohmic characteristics and stability in humid air.
Bishop, C. J.↗
Meteorological applications of the Nimbus 4 temperature-humidity infrared radiometer, 6.7 micron channel data.
Midtropospheric circulation features under essentially clear sky conditions have been noted in the data of the 6.7-micron channel of the Nimbus 4 temperature-humidity infrared radiometer (THIR), while at the same time these features were undetected by the 11.5-micron channel of the same instrument. The characteristic response of the 6.7-micron channel to atmospheric water vapor emission is primarily from the 250-mb (10.5 km) to 500-mb (5.5 km) levels with a peak contribution at 350 mb (8 km). Dry and moist patterns seen in the 6.7-micron data on Feb. 21, 1971, have been integrated into a 400-mb moisture analysis over the United States. This analysis provided more detailed and timely information than was conventionally available about the advection of dry air aloft prior to development of the Mississippi Tornado of February 1971.
Allison, L. J.↗
Desiccant humidity control system
A regenerable sorbent system was investigated for controlling the humidity and carbon dioxide concentration of the space shuttle cabin atmosphere. The sorbents considered for water and carbon dioxide removal were silica gel and molecular sieves. Bed optimization and preliminary system design are discussed along with system optimization studies and weight penalites.
Amazeen, J.↗
Low frost-point humidity generator
A low frost-point humidity generator has been developed at NBS to provide a capability for calibration, testing, and research at very low levels of water vapor content in such gases as atmospheric air, carbon dioxide and nitrogen. The generator produces frost points from -30 to -100 C at ambient pressures from 500 to 200,000 pascals (0.005 to 2 atm.). This is equivalent to mixing ratios of 4 micrograms to 51 grams of water vapor per kilogram of dry air and to vapor pressures of .0014 to 38 pascals. The generated test gas can be fed to a test chamber with independent temperature control between +25 and -100 C. The uncertainty of the frost point in the test chamber is estimated not to exceed 0.05 deg C.
Greenspan, L.↗
Quartz crystal microbalances to measure wind velocity and air humidity
Instrument includes four temperature-sensing, Y-cut quartz crystals to determine wind direction, velocity, and temperature. Two additional AT-cut crystals are used to determine air humidity. Entire signal processing is provided by built-in electronics circuits.
Stephens, J. B.↗
Low altitude temperature and humidity profile data for application to aircraft noise propagation
A data search of the weather statistics from 11 widely dispersed geographical locations within the continental United States was conducted. The sites, located long both sea-coasts and in the interior, span the northern, southern, and middle latitudes. The weather statistics, retrieved from the records of these 11 sites, consist of two daily observations taken over a 10-year period. The data were sorted with respect to precipitation and surface winds and classified into temperature intervals of 5 C and relative humidity intervals of 10 percent for the lower 1400 meters of the atmosphere. These data were assembled in a statistical format and further classified into altitude increments of 200 meters. The data are presented as sets of tables for each site by season of the year and include both daily observations.
Connor, A. B.↗
Relative humidity from psychrometric data
Analytical equation for computing relative humidity as function of wet bulb temperature, dry bulb temperature, and atmospheric pressure is suitable for use with calculator or computer. Analytical expressions may be useful for chemical process control systems and building environmental control systems.
Putnam, T. W.↗
A prototype carbon dioxide and humidity control system for Shuttle mission extension capability
This paper describes an advanced regenerable carbon dioxide (CO2) and humidity control system being developed for the NASA Johnson Space Center. The system offers substantial weight advantages in comparison with the baseline Shuttle Orbiter expendable, lithium hydroxide CO2 removal system for extended missions beyond the nominal design of 4 men for 7 days. The regenerable system offers a potential weight savings of 431 kg for a 7-man 30-day mission. A regenerable sorbent material designated as HS-C coadsorbs CO2 and water vapor from the cabin atmosphere and desorbs the CO2 and H2O vapor overboard when exposed to the space vacuum. In addition to a comparison of the regenerable system with the baseline Shuttle expendable system, HS-C mission simulation test results and the flight prototype regenerable system currently being fabricated are presented. The paper shows the integration of the system into the Shuttle Orbiter vehicle; exclusive of cryogenic fuel-cell power expendables, the available packaging envelope is sufficient to stow all expendables necessary for HS-C operation on 30-day extended missions.
Cusick, R. J.↗
Humidity-resistant black-nickel coatings
Black-nickel coatings for solar collectors are improved by increasing metal hydroxide concentration. Humidity resistance increased while optical properties are essentially unchanged.
Lowery, J. R.↗
A regenerable CO2 and humidity control system for Shuttle
A regenerable CO2 and humidity control system is presently being developed for potential use on Shuttle as an alternate to the baseline Lithium Hydroxide (LiOH) system. The system utilizes a sorbent material (designated 'HS-C') to adsorb CO2 and water vapor from the cabin atmosphere and desorb the CO2 and water vapor overboard when exposed to a space vacuum. Past development programs concentrated on material development and breadboard system fabrication and testing. The present program calls for the design of a flight prototype system capable of integration into the Shuttle vehicle and the development of major components. This paper will show that a regenerable system utilizing HS-C material trades even with the shuttle LiOH system for the baseline four-man, seven-day mission and offers increased savings up to 448 kg for a seven-man, 30-day mission.
Boehm, A. M.↗