Emission of water vapour in uninsulated cowshed

Abstract

The AIMS of this study were, first to work out a simple method to establish Water vapour emission ill a cattle house under production conditions. and then to establish the emission of water vapour in an uninsulated cowshed during the winter. It was analytically found that to determine water vapour emission in a room it is enough to measure the indoor and outdoor temperature, relative humidity and carbon dioxide concentration in the indoor and outdoor air. After an uninsulated cowshed was studied. a regression equation (exponential) relating the flow of water vapour emission with the indoor air temperature was drawn. When temperature is -10 degrees C, specific intensity of water vapour emission (amount of water vapour produced by animals and the 100111 per unit or total animal heat) is 0.054 g/kJ and at +10 degrees C it is 0.135 g/kJ. When using the values of specific water vapour emission, the calculation id parameters of ventilation intensity and ventilation system becomes simplified.