A PSYCHROMETRIC CHART FOR DETERMINING THE DEWPOINT AND RELATIVE HUMIDITY

An instrument has been designed and constructed to allow direct measurement of the relative humidity of humid air. The objective of the study is to use the effect of humidity on the linear expansion of a piece of hair that is pulled with a spring or a small weight while exposed to the humid air. This can result in producing such an instrument if the hair sample is specific. For the hair used in this work, relative humidities ranging from 0 to 100 per cent result in a one-dimensional change of about 0.02m/m. As the humidity of the air is decreased or increased, the hair is shortened or lengthened and turns the pointer connected to its end. The pointer detects the relative humidity of humid air on a calibrated plate. A series of experimental data are extracted in different environments using this instrument. The data are in good agreement with the results obtained from the psychrometric chart and mass transfer calculations.

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The Use of a Psychrometric Chart in the Absorption-Evaporative Cooling Refrigerator

10.1115/imece1999-0814 ◽

1999 ◽

Author(s):

Juan R. Morales G. ◽

Araceli Lara V. ◽

Arturo Lizardi R. ◽

Raymundo López C. ◽

Alen Díaz C.

Keyword(s):

Relative Humidity ◽

Satisfactory Agreement ◽

Evaporative Cooling ◽

Gaseous Ammonia ◽

Equilibrium Conditions ◽

Ideal Gases ◽

Butane Mixture ◽

Psychrometric Chart

Abstract In the absorption-evaporative cooling refrigerator, the evaporator works with liquid butane and a gaseous ammonia-butane mixture. In order to design such a refrigerator the mixture behavior has to be known. In this paper such behavior is determined first considering an ideal gases mixture and no ammonia in the liquid butane. For this purpose a psychrometric chart for a pressure of 105 kPa is obtained. To validate these assumptions a second model is chosen that considers a certain amount of non-ideality. The selected model is represented by the equations of Peng-Robinson. The results obtained for the equilibrium conditions are compared with the 100% relative humidity of the psychrometric chart. A satisfactory agreement is found.

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Effect of relative humidity on the rate of dissolution of aluminium in iodine-methanol solution

Journal of Biochemical Toxicology ◽

10.1002/jbt.2570091004 ◽

1959 ◽

Vol 9 (10) ◽

pp. 519-520

Author(s):

D. F. Maclennan

Keyword(s):

Relative Humidity ◽

Methanol Solution ◽

Rate Of Dissolution

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168. Prediction of the Effect of High Relative Humidity on Organic Vapor Cartridge Performance

10.3320/1.2765684 ◽

2001 ◽

Author(s):

E. Johnson ◽

L. Brey

Keyword(s):

Relative Humidity ◽

High Relative Humidity ◽

Organic Vapor

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EPIDEMIOLOGY, ECOLOGY AND PREVALENCE OF SOIL TRANSMITTED HELMINTHS FROM KOSHI REGION OF NORTH BIHAR.

FLORA AND FAUNA ◽

10.33451/florafauna.v24i1pp155-162 ◽

2018 ◽

Vol 24 (1) ◽

Author(s):

LAKSHMI CHOUDHARY ◽

PRABHAWATI PRABHAWATI

Keyword(s):

Relative Humidity ◽

Ascaris Lumbricoides ◽

Rainy Season ◽

Climatic Factors ◽

Trichuris Trichiura ◽

Hookworm Infection ◽

Soil Transmitted Helminths ◽

High Incidence ◽

Apparently Healthy

Prevalence of soil transmitted helminthes infections in apparently healthy school going children and other 528 people of different districts of Koshi regions of North Bihar were evaluated. Over all incidences of STHs infection was 39.39% during study. High incidence of STH was seen in the rainy season i.e., in the month of July and August, September, significantly higher (P<0.05) .The incidence of Ascaris lumbricoides was highest in the month of August (18.64%). The month of September was 15.25% followed by that of July (14.4%) and October with 10.16%. Also the incidence of hookworm registered the highest incidence in the month of June (19.27%) and lowest in the month of December (4.82%) during the study period. However prevalence of Trichuris trichiura was negligible and it was almost nil in the most of the months but was highest in month of September with 28.57% and lowest in October with 14.00% The climatic factors are responsible for soil transmitted helminthes which are temperature, rainfall and relative humidity. Ascariasis, Trichuriasis and Ancyclostomiasis (Hookworm infection) are found to be endemic in this region.

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EL NINO RELATED CLIMATE AND DENGUE FEVER CASES IN JEDDAH, SAUDI ARABIA

FLORA AND FAUNA ◽

10.33451/florafauna.v25i1pp91-99 ◽

2019 ◽

Vol 25 (1) ◽

Author(s):

MASROOR ALI KHAN ◽

KHALID AL GHAMDI ◽

JAZEM A. MEHYOUB ◽

RAKHSHAN KHAN

Keyword(s):

Relative Humidity ◽

Dengue Fever ◽

El Niño ◽

Significant Relationship ◽

El Nino ◽

Climate Data ◽

Light Traps ◽

Mosquito Abundance ◽

Dengue Transmission ◽

The Relationship

The focus of this study is to find the relationship between El Nino and dengue fever cases in the study area.Mosquito density was recorded with the help of light traps and through aspirators collection. Climate data were obtained from National Meteorology and Environment centre. (Year wise El Nino and La Nina data are according to NOAA & Golden Gate Weather Services). Statistical methods were used to establish the correlation coefficient between different factors. A high significant relationship was observed between Relative Humidity and Dengue fever cases, but Aedes abundance had no significant relationship with either Relative humidity and Temperature. Our conclusion is that the El Nino does not affect the dengue transmission and Aedes mosquito abundance in this region, which is supported by earlier works.

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