Moistrure production rate of cowshed = Wspolczynnik wilgotnosci w oborze

Abstract

In designing ventilation system and outside partitions for animal housing an important criterion is the amount of water vapour produced in the building. There is no data regarding water vapour emission in a room with temperature below zero. In addition, sophisticated methods are applied to measure emission. A simple method to establish water vapour emission in a cattle house under production conditions has been substantiated. Having made research in a uninsulated cowshed a regression equation (exponential) relating the flow of water vapour emission with the inside air temperature has been drawn. When temperature is minus 10° C, specific intensity of water vapour emission (amount of water vapour produced by animals and the room per unit of total animal heat) is 0,054 g/kJ and at plus 10° C it is 0,135 g/kJ. Having analysed the data of water vapour emission in cowsheds with temperatures above zero presented by other authors it can be stated that the regression equation drawn reflects the regularity of water vapour emission well.