Solar Collectors for Hay Ventilation
2008
Nydegger, F., Forschungsanstalt Agroscope Reckenholz-Taenikon ART, Ettenhausen (Switzerland)
Farms with silo-free milk production are dependent upon high-quality dry forage. In areas close to the Alps, the production of field-dried forage is associated with substantial weather-related risks. For this reason, hay-ventilation facilities are in use. Solar collectors are an environmentally friendly option for increasing drying power. As they are generally a component part of the barn roof, it is advantageous if the necessary considerations on air conveyance and the dimensions of the solar collector can be taken into account at the planning stage of the building. The ART-SOKO Hay-Ventilation Dimensioning program, which is especially geared to advisers and planners, aids in the planning of solar collectors for hay ventilation. The software calculates for up to six haystacks the throughput of the ventilator and the pressure loss with the set situation for each of a maximum of four collector fields, as well as airflow velocity, pressure loss, efficiency and possible rise in temperature. The reference point for the installation is derived from the calculation of the optimum distance between roof cover and air-guide plate (underroof). The point at which maximum efficiency below the maximum tolerated pressure loss is reached is calculated for each collector field.
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Este registro bibliográfico ha sido proporcionado por Agroscope Reckenholz-Tänikon Research Station