A fan-actuated mechanism for controlled exposure of a psychrometer wet buld sensor to a dusty environment

An aspirated psychrometer which uses a unique mechanism for raising the wet bulb sensor from a reservoir and into the airstream during aspiration was designed and tested. The device uses thermocouples and an electronic datalogger to measure the wet bulb and dry bulb temperatures during aspiration. I...

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Bibliographic Details
Published inApplied engineering in agriculture Vol. 7; no. 4
Main Authors Costello, T.A. (University of Arkansas, Fayetteville), Berry, I.L, Benz, R.C
Format Journal Article
LanguageEnglish
Published 01.07.1991
Subjects
ALOJAMIENTO PARA AVES
CONCEPTION
CONTROLE DE PERFORMANCE
DISENO
HUMEDAD
HUMIDITE
INSTRUMENT DE MESURE
INSTRUMENTOS DE MEDICION
LOGEMENT DES VOLAILLES
MEDICION
MESURE
PRUEBAS DE RENDIMIENTO
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Summary:An aspirated psychrometer which uses a unique mechanism for raising the wet bulb sensor from a reservoir and into the airstream during aspiration was designed and tested. The device uses thermocouples and an electronic datalogger to measure the wet bulb and dry bulb temperatures during aspiration. In laboratory tests over a wide range of vapor pressures, the root-mean-squared-difference (RMSD) between relative humidity from the psychrometer and a chilled mirror hygrometer was 0.3%. In tests in a commercial broiler house, differences between three psychrometers (RMSD=2.0%) could be traced to experimental uncertainty in temperature measurement. Tests in broiler houses have shown the psychrometer mechanisms to be reliable with minor maintenance required every five to ten days
Bibliography:9319673
L01
ISSN:0883-8542
1943-7838