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Type of publication: Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Mechanikos inžinerija / Mechanical Engineering (T009)
Author(s): Kavolėlis, Bronius
Title: Thermal and humidity environmental conditions in uninsulated cowshed
Is part of: Actual tasks on agricultural engineering : 35th international symposium on agricultural engineering, Opatija, Croatia, 19-23 February 2007: proceedings. Zagreb: University of Zagreb, 2007, no. 35
Extent: p. 321-327
Date: 2007
Note: Tomo antraštė: Proceedings of the 35th symposium on agricultural engineering
Keywords: Cowshed;Thermal characteristics;Temperature difference;Air humidity
Abstract: Having carried out the literature analysis it has been established that the relative air humidity in spacious cowsheds is often high and even exceeds the relative air humidity outside by 15%. It is considered that the reason for high humidity is inadequate ventilation in the cowshed. The work objective is to substantiate reasoned values of environmental conditions (i. e., air temperature and relative humidity) in a cowshed which are necessary in designing and operating a ventilation system. Analytical and experimental research methods have been applied using the principles of thermophysics. An equation relating relative humidity in a cowshed with the temperature difference between the inside and outside air has been drawn. Another equation showing the biggest allowed temperature difference to prevent condensation of water vapour on the internal surface of external barriers has been drawn. Analytical and experimental research has substantiated that probable minimum humidity in a cowshed is about 5 % lower than relative humidity outside. The reasoned temperature difference between the inside and outside air during cold season is about 4° C, when the heat transfer rate of walls and roof was 4.5 W/(m².K)
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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