WINDOWLESS CATTLE SHED STRUCTURE OF NATURAL VENTILATION SYSTEM AND VENTILATION OF WINDOWLESS CATTLE SHED

摘要

PURPOSE:To make the ventilation efficiency large and prevent the suction of discharged air by developing a rising current of the air from outside in the space under the roof where the air is most heated by solar energy and utilizing the energy of the rising current of the air for the ventilation of a cattle shed. CONSTITUTION:The air that flows in from an inlet 13 into a rising air current channel 10 under ceiling boards 8 ascends by the chimney effect and is discharged to the outside from a discharge air tower T. If the solar energy is strong, the air in the rising air current channel 10 is heated by the heating of the ceiling boards 8 and the speed of the rising air current becomes further faster. Now, if in summer both dampers 21 and 22 are opened and an air intake port 16 and air discharge port 17 are opened, the air in a cattle shed is drawn by the air that is passing through the rising air current channel 10 to the air discharge tower T at the air discharge port 17, and with this air the air in the cattle shed is discharged from an air discharge window of the air discharge tower T to the outside. In winter the volume of ventilation is adjusted by closing the dampers 21 and 22 or by the degree of opening of those dampers, but the speed of the rising of the air in the rising air current channel 10 is very low so that the volume of ventilation is smaller than in summer.