Designers of duct and heat recovery systems for incinerators or heaters must know if the flue gas systems contain acid vapors and will the vapors reach their dew points and condense. It the answer is yes,' then the dew point program can help an engineer calculate the ...
Energy Citations Database
... Accession Number : ADA052402. Title : Acid Dew-Point Determination for Gas-Turbine, Waste-Heat Recovery Units. Descriptive ...
DTIC Science & Technology
The student will investigate conditions causing saturation and measure the dew point of the atmosphere performing simple experiments. ...
NASA Website
... DEW-POINT ACCURACIES ... saturation. This report presents the radiosonde- measured atmospheric moisture accuracies in terms of dew point, ie, ...
record the air stream dew point in the NASA Lewis 10xl0 Supersonic ... If the dew point reading finally obtained was not suitable for taking data, ...
This is the dew point temperature. Record dew point temperature. ... Record the temperature and dew point temperature at ground level. ...
Jul 27, 2005 ... The dew point is the day-to-day measure of humidity in the atmosphere. Another critical measure is the design dew point the maximum ...
... Title : An Improved Continuous-Indicating Dew-Point Meter. ... Descriptors : *DEW POINT, *HYGROMETERS, ELECTRIC BRIDGES, CIRCUITS. ...
Jul 28, 2004 ... BAE-146 Dew Point Temperature (K). Dew Point Temperature Correlation. 07/28/2004 ... T is dew point/frost temperature in degree C. ...
... FACILITIES), (*ATMOSPHERIC TEMPERATURE, WEATHER FORECASTING), (*DEW POINT, WEATHER FORECASTING), CLOUD COVER, WIND ...
... Descriptors : (*HYGROMETERS, PERFORMANCE(ENGINEERING)), AERONAUTICAL LABORATORIES, DEW POINT, GAS FLOW, VACUUM ...
To improve the thermal efficiency of combustion equipment it is necessary to cool the flue gas to a low outlet temperature, to recover as much heat as possible. But the temperature must not be so low that sulfur from the fuel will condense as sulfuric acid-giving a very corrosive flue gas. Therefore, a graph is presented to help estimate sulfuric acid ...
The efficiency of gas-turbine engines can be increased at constant turbine inlet temperatures with the addition of a bottoming waste-heat recovery cycle. The waste-heat recovery unit introduces several additional problems, one of which is corrosion due to the condensation of sulfuric acid vapors in the low-temperature section of the waste-heat recovery unit and the downstream ...
The performance of boiler heat exchangers is limited by the need to keep the flue gas temperature above its dew point to avoid condensation of corrosive acids. However, latent heat can be recovered at temperatures below the dew point of the gas by protect...
National Technical Information Service (NTIS)
The experimental determination of acid corrosion and fouling effects upon a series of tubular heat exchanger modules exposed to the exhaust gases from a large (8900-hp) diesel engine, with different fin geometries and materials was studied. A study of the exhaust gas analysis was undertaken and acid dew point ...
NASA Astrophysics Data System (ADS)
The 108 Building dew point analyzers measure dew point at atmospheric pressure. Existing 108 Roundsheets state the maximum dew point temperature shall be less than {minus}50 F. After repeatedly failing to maintain a {minus}50 F dew ...
A method is disclosed of optimizing the collection efficiency of a dry-process electrostatic precipitator which is preceded by an evaporative cooler, wherein liquid is sprayed into the evaporative cooler at a rate which is controllable to maintain a desired temperature, includes the steps of intermittently measuring the dew points of ...
The 108 Building dew point analyzers measure dew point at atmospheric pressure. Existing 108 Roundsheets state the maximum dew point temperature shall be less than (minus)50 F. After repeatedly failing to maintain a (minus)50 F dew ...
Redesign goals of the expendable dew point hygrometer are as follows: Introduce simplifications, where feasible, to all components of the expendable dew point hygrometer. The application of integrated circuitry for this purpose shall be examined; The 'che...
The underlying principle for the proposed probe is the determination of the dew point of the vapor phase compounds. Once the dew point has been established the concentration can be deduced from the available thermodynamic equilibrium data. The dew point o...
The Expendable Dew Point Hygrometer is a lightweight, battery powered, automatic dew point hygrometer developed for tropospheric balloon soundings. It is designed to be used in conjunction with a radiosonde in gathering meteorological data. The measuremen...
The report is a condensation of information currently available in the Earth Sciences laboratory concerning the frequency of occurrence of high dew points and the temperatures that are associated with high dew points. In the first section of the report, g...
Aug 2, 2010 ... D. dew point: the temperature to which an air mass must be cooled in order for the air mass to become saturated (relative humidity equals ...
temperature-dew point spread - The difference between air temperature and dew point temperature. As the spread becomes less, relative humidity increases, ...
... Accession Number : AD0404877. Title : THE TEXAS DEW POINT FRONT AS SEEN BY TIROS I. Descriptive Note : Scientific rept. ...
... Accession Number : AD0685174. Title : THE EXPENDABLE DEW POINT HYGROMETER. Descriptive Note : Final rept. 15 Apr 65-31 Dec 68,. ...
... Accession Number : ADD135945. Title : Sulphur Dew-Point Corrosion Resistant Mechanism of Austenitic Stainless Steels,. ...
... Accession Number : AD0626159. Title : RESULTS OF TEST PROGRAM ON AIRCRAFT DEW POINT HYGROMETER. Descriptive Note : Final rept. ...
... Accession Number : AD0659760. Title : RADIOSONDE DEW-POINT ACCURACIES 40C TO -40C. Descriptive Note : Technical rept. ...
... Accession Number : AD0760780. Title : R and D Design Evaluation Report. Expendable Dew Point Hygrometer. Descriptive Note : Final rept. ...
... Accession Number : ADA114977. Title : Performance of Temperature/Dew Point Instruments. Descriptive Note : Final methodology investigation,. ...
The absolute magnitude ( 4oC for temperature, 10oC for dew point) and spatial ... Profiles of temperature (solid) and dew point (dashed) near Wallops Island ...
This independent review verified Idaho National Labotory's approach of measuring the rate of hydrogen production using dew point temperatures.
... Accession Number : AD0760810. Title : Instruction Manual for Expendable Dew Point Hygrometer. Descriptive Note : Final rept. Dec 69-Jan 71,. ...
evaporation, and dew point; mean maximum and minimum temperatures; absolute ... dew point; and total precipitation. Determined individually: mean maximum ...
Jun 16, 2011 ... The most useful equation developed included three variables: dry bulb temperature, dew point temperature, and dew point depression. ...
Treesearch
... T Temperature, *C Td Dew-point temperature, *C P Pressure, mb ... Error word: NAG RNR RC. Negative mean dew-point depression. ...
Dew Point: The temperature of air where clouds develop. TO RETURN TO THE AERONAUTS PROGRAM, CLOSE THIS WINDOW. Please send any comments to: Curator: Tom. ...
Nov 5, 2010 ... Parameters: OXYGEN COMPOUNDS, ATMOSPHERIC STABILITY, AIR TEMPERATURE, TEMPERATURE PROFILES, DEW POINT TEMPERATURE, DEW POINT TEMPERATURE, ...
Nov 5, 2010 ... Parameters: OXYGEN COMPOUNDS, AIR TEMPERATURE, ATMOSPHERIC STABILITY, DEW POINT TEMPERATURE, TEMPERATURE PROFILES, DEW POINT TEMPERATURE, ...
ling and monitoring the air temperature, dew point temperature, ..... subsystem is to control dew point of the cabin air exiting from the heat exchanger. ...
Sep 1, 2011... of fires using data from the Great Lakes region of the United States. ... dew point temperature, dew point depression, wet bulb temperature ...
... AN IMPROVED CONTINUOUS -INDICATING DEW -POINT METER By Frank A. Friswold, Ralph D. Lewis and R. Clyde Wheeler, Jr. ...
Science Keywords > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > DEW POINT TEMPERATURE. Refine by Category. Please select a field, Projects, Data Centers ...
... dew points, water-vapor density was determined from dew points and air temperatures. The probabilities of water-vapor densities were calculated ...
A method of separating a hot hydrocarbonaceous stream is described, consisting of contacting the hot hydrocarbonaceous stream at a temperature above the dew point of water in a contacting zone with an aqueous alkaline solution in the amount sufficient to simultaneously neutralize the acidic inorganic compound. The hot hydrocarbonaceous ...
One of the more difficult forecast problems in the local fire weather program concerns the changes in the dew point temperatures during the time that an air mass is changing or modifying rapidly. Specifically, reference is made to the increase in dew poin...
A new device was made to determine the dew-point from the varintion in ionization current due to the absorption of alpha particles by the dews. The construction of the hygrometer is shown. (auth)
A gaseous stream of steam is analyzed for hydrogen sulfide by keeping the gas stream above its dew point while withdrawing a representative sample, mixing the sample with a gas having a dew point lower than that of the gaseous stream to form a mixture with a dew point below ...
... radiation, fuel moisture and temperature, barometric pressure, and dew point for a variety of uses, including evaluation of ... ...
NBII National Biological Information Infrastructure
... VAPOR, TROPOPAUSE, MOISTURE, DEW POINT, ATMOSPHERE MODELS, SOUNDING ROCKETS, NOCTILUCENT CLOUDS, SAMPLING. ...
... to bring the moss shoot surfaces to the dew point and to reverse the daytime temperature gradient through ... ...
... DATA, ATMOSPHERIC TEMPERATURE, DIURNAL VARIATIONS, DEW POINT, VISIBILITY, CLOUDS, ATMOSPHERIC PRECIPITATION, WIND ...
... NUMERICAL ANALYSIS), (*CLOUD COVER, WEATHER FORECASTING), MATHEMATICAL PREDICTION, TEMPERATURE, DEW POINT, ICE. ...
The report gives results of a study of the formation and growth of sulfate particles. Existing theoretical models on acid particle formation and growth were reviewed and evaluated. The formation and growth of sulfate particles during slow cooling, rapid cooling, and dilution cooling of flue gas were experimentally determined and compared with theories. The experimental results ...
... Observations of temperature, dew point, dew deposition, winds, vertical wind, net radiative flux, drop size and liquid water content are discussed in ...
Dec 18, 2008 ... The dew point is the temperature at which water vapor in the air condenses as moisture. Morning dew on grass means that the night time ...
A detailed analysis is presented of the fluxes of water, sulfuric acid, and solids deposited onto walls at temperatures below the dew point of stack gases containing sulfur oxides in contact with them for two regimes of condensation, with and without fog formation. Experimental measurements are in good agreement with the calculations ...
Dew Point calculator predicts the dew point temperature from a given relative humidity and temperature. The user first selects the units, then enters input values of relative humidy and temperature and the calculator gives the dew point. "When air is cooled the relative ...
NSDL National Science Digital Library
It is shown that acid dew point measurements of the flue gases before and after the air preheater are fairly predictive of the acid condensation occurring and its corrosion potential. Use of fuel oil additives can complicate the data collection and interpretation, necessitating supplemental techniques to gauge the ...
A process is described to remove oxides of sulfur and nitrogen from combustion exhaust gases, the steps that include: (a) flowing a stream of the exhaust gas through a processing zone, (b) flowing a coolant fluid rough the zone via coolant flow tubing to indirectly cool the exhaust gas stream to a temperature below the dew point of the stream thereby to ...
Dews and frosts forming on chemically clean Teflon surfaces were sampled for pH and ion concentrations during a 13-month period in urban Indianapolis, Indiana. We predicted that dews forming in this polluted atmosphere would be acidic due to absorption of...
Calculating dew points of various acid gases and options for reducing cold end corrosion of heat recovery exchangers are presented. Whenever fossil fuels containing sulfur are fired in heater or boilers, sulfur dioxide, and to a small extent sulfur trioxide, are formed in addition to CO/sub 2/ and water vapor. The SO/sub 3/ combines ...
This paper describes a method for computing: (1) the chemical composition of the first drop of condensate which forms at dew-point temperature through expansion of superheated steam, and (2) the saturation index of the drop with respect to relevant solid phases, such as halite, amorphous silica, boric acid, borax and sal ammoniac. ...
A method for calibrating an aluminum oxide hygrometer against an optical chilled mirror dew-point hygrometer has been established. A theoretical cross-point line of dew points from both hygrometers and a maximum moisture content of 10 ppM/sub v/ are used ...
Dew water characteristics are not as acidic as those of rainwater and fog water, and they are abundant in weak acid components. The dew water components are dominated by the coarse-mode aerosol rather than the fine-mode aerosol, and calcium carbonate, the component of soil, is the important chemical species raising ...
A novel method for dew detection based on photonic crystal fiber (PCF) interferometer that operates in reflection mode is presented in this paper. A large wavelength peak shift for the interference pattern is observed at the onset of dew formation. The fabrication of the sensor head is simple since it only involves cleaving and splicing. By attaching a ...
This report is the first observation of natural chemical denitrification in the drying process of dew. Nitrogen compounds released in the atmosphere are considered to be subjected to oxidation to form nitric acid by the chemical process so far. The results here show that nitrous acid is reduced to N{sub 2} by drying of ...
bulb dew point wet bulb sea temp air temp air-sea temp difference clouds wind ... wet bulb, and dew point. FLAG VALUE ASSIGNED: L Dry bulb outside mean X ...
This method covers the determination of the water vapor content of gaseous fuels by measurement of the dew-point temperature and the calculation therefrom of the water vapor content.
VG gas inlet temperaturenor the dew point show dramaticimprovementover the integrated .... with a VL dew point error of + 5�F (2.8�C) can be calculated ...
The design and properties of an electronic humidity measuring system for the determination of the water-vapor content in air or other gases are described. The system is based on an integrated silicon dew-point sensor. After a discussion of the increasing ...
Screening regression is used to obtain relationships between predictands consisting of surface dew point temperatures, and predictors consisting of the predictand values a day earlier and upper air parameters analyzed at selected gridpoints on the same da...
A series of field trials was conducted to assess the performance of temperature/dew point systems used at the US Army Dugway Proving ground, UT. Data quality was degraded by noise, calibration drift, and exposure to adverse ambient conditions. Improved no...
This data set contains spatially gridded average annual precipitation, temperature (max and min), and dew point for the climatological period 1971-2000. ... ...
This datasets contains 40 maps representing dew point temperature forcasts for times occuring every three hours during the next seven day period. The model is run every three hours, so ... ...
03.07-0821 Miniature Airborne Dew Point Sensor Niagara Scientific, Inc. 4004 New Court Avenue Syracuse, NY 13206 Carl F. Fahrenkrug (315-437-0821) LaRC ...
Dew Point and Humidity -- EG&G Model 137-C3 Dew Point Hygrometers -- NCAR Model LA-3 Lyman-alpha Hygrometer 5. Flow Angle Sensors -- Rosemount Model 858 ...
... 100 Page 36. DEW-POINT TEMPERATURE (0C) - MEANS 2.2A 1 2- - - Page 37. DEW-POINT TEMPERATURE (0C) -STANDARD DEVIATIONS 1 6 ...
This report examines the various tests made to characterize and quantify causes of differences in results between the dew point hygrometer and the wet bulb psychrometer methods of measuring humidity. The Environmental Protection Agency Motor Vehicle Emiss...
A new high response on-line measurement system has been developed to continuously display and record the air stream dew point in the NASA Lewis 10310 ...
The purpose was to design, construct and test an automatic apparatus for the experimental determination of the dew and bubble points of oils and gasses at reservoir conditions using a microwave detection technique. The apparatus uses an isothermal variabl...
... a depth of 5 cm, air temperature, rainfall, solar radiation, wind speed, and dew point were recorded on a ... approximately 5 km from the plot area, and solar radiation, wind speed, and dew point were rec...
... Accession Number : ADD250975. Title : Active Oxidation of SiC in Low Dew-Point Hydrogen Above 1400 Degrees C. Descriptive ...
A simple, inexpensive, manually operated dew- or frost-point hygrometer has been designed, fabricated and installed in a system that functions at atmospheric pressure and vacuum. It is intended primarily for the detection of water vapor pressure in a conf...
Burning methanol produces formic acid, which can cause steel corrosion at temperatures below the dew point of the exhaust gas. Because of the potential of methanol as an alternate automotive fuel, it is of interest to evaluate the conditions, which can aggravate or mitigate the extent of this rust formation. Rust formation is promoted ...
Methods used to measure sulfur trioxide-sulfuric acid in flue gas are discussed. Techniques include isopropyl alcohol, controlled condensation, and dew point measurement. Limitations of each method are described. The controlled condensation method generally produced the most reliable results, but no method emerged as clearly superior. ...
The efficiency of gas-turbine engines can be increased at constant turbine inlet temperatures with the addition of a bottoming waste-heat recovery cycle. The waste-heat recovery unit introduces several additional problems, one of which is corrosion due to...
... It is based on data furnished by the USAF Climatic Center, Asheville, N. C. From this information a judg- ment is made as to the dew points which ...
, for instance, a chilled hygrometer unit to measure dew point temperature, shall be exposed through
E-print Network
... DEW POINT, EVAPORATION, RAINFALL, TROPICAL CYCLONES, WIND, DIURNAL VARIATIONS, ATLANTIC OCEAN, LESSER ANTILLES. ...
The cloud altitude calculator sovles for the height and temparture at which clouds will form based on the surface air temperature and dew point
... temperature and the meteorological parameters comprising air temperature, dew point, wind speed and direction, solar insolation and barometric ...
An interface for site wide Southern Great Plains animations of temperature, dew point, relative humidity, and sea level pressure.
