|
Abstract: In Holland mushroom growing and mushroom farms are being standardized. The first standard house was built in 1960, since than several farms have been altered or built to comply with it. Farms are small 2-3 houses about 1800 sq ft each. Most growers start on a small scale, gradually expending the cultivated surface. Hence one feature of the design is a practical method of enlarging the building e.g. the ridge of the roof is placed at right angles to the length of the house, as it is easier to push on the ridge pool of the roof than to add a new gable roof. Materials are selected to obtain the best results for the smallest outlay, but no retrenchments whatever are made affecting quality. Insulation is based on U-values of 0.13 for walls and 0.07 for the ceiling. Walls are double outer side bricks (half stone), inner side concrete blocks, the combination suffices to support the roof. The false ceiling is insulated with flax awn or glass wool, protected against moisture by bitumen at the (warm) inside, it can dry at the (cold) outside through open contact with the air. The iron bars carrrying the false ceiling are light, as they are supported by the bedposts. Heating pipes run along the walls Hitherto natural ventilation appeared sufficient, supported, if necessary, by a fan in the ceiling Air comes in by four vents in front and back walls, air circulation is provided by portable fans. Forced ventilation is under study, so are cooling in summer or complete air-conditioning. Since the yields are so much higher than before, forced ventilation appears to be highly important and cooling seems justified.
Full text download: ISMS subscribers
ISHS members & pay-per-view
Translate:
   |