| 摘要 |
<p>The system is for heating of air for the force-ventilation of rooms by an exhauster fan, where up to a specific level above the floor the temperature must be kept within close limits over the whole area and no draughts may occur. It is partic. for pig sties used for rearing or fattening, and incorporates one or more air heaters. All fresh air from outside must, before entering the rooms, flow over air heaters in the room placed against outside walls and with inbuilt heat sources. Here it is heated to a temperature no more than ten or more degrees Kelvin higher than the desired constant temperature. The heat source is a fossil fuel, obtaining its combustion air from the outside air flowing through. The emerging combustion gases are returned to the current of incoming air, with which they are thoroughly mixed.</p> |
