We developed a novel dew-point control system [advanced (ADCS)] in primary standard humidity generator based on the two-pressure technique. In ADCS, actual vapor–liquid equilibrium temperature of water was estimated for control, and pressure inside main saturator controlled by adjusting variable opening an expansion valve. Using periodic variation (oscillation) dew point observed low range grea...

The concept of a dew-point front was introduced, and its existence was identified near the periphery of the west Pacific subtropical anticyclone by using the daily 1 1 data of the National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR). The dew-point front was a transitional belt between the moist southwest monsoon flow and the dry adiabatic sinking flo...

Abstract A great attention is subjected to the environmentally friendly natural gas. Compared other fossil fuels, gas a cleaner burning due lower emission of carbon dioxides into air. Removal associated hydrocarbons from streams plays an important role sell and achieve pipeline specification To satisfy pipelines, hydrocarbon dew point water must be controlled below operating conditions prevent ...

An empirical study was made of the relationship of precipitation occurrence t o linearly interpolated concurrent vertical motion, 500-mb. initial 1-orticity, vorticity advection, and the average of the 700-mb. and 500-mb. dew point depressions a t Salt Lake City, Utah. All parameters except dew point depressions were obtained from the facsimile charts transmitted by the National Meteorological ...

An essential requirement for an operating PEM fuel cell is providing proper water content in the membrane. To avoid water flooding an appropriate water balance is required. Here, an analytic model of a planar membrane humidifier for PEM fuel cell is proposed where the effect of dimensional parameters includes membrane thickness, membrane area and channel hydraulic diameter are investigated. A N...

Received: 13 Mar. 2012; Revised 25 Jul. 2012; Accepted 04 Aug. 2012 Received: April 8, 2012; Revised May 4, 2012; Accepted June 6, 2012 Abstract: Aiming at the problem of atmospheric humidity measurement, this paper proposes a method to measure dew point based on sensitive circuit for the first time. We use the quartz crystal in the Colpitts circuit as the humidity sensitive element. Since the ...