Dried fruit in different ways. Most of all — air solar method, have, in addition to the obvious advantages (simplicity, accessibility, etc.), the well-known disadvantages.
The proposed option heliodryer free from many inherent in other designs shortcomings. The “greenhouse effect” works in it, as they say, a hundred percent, providing the temperature under the film at 20-25°C above the ambient temperature.
The drying process is almost 3 times harder due to the slope of the drying pad and the temperature difference between the air, the conditions for optimum circulation inside the last installation and the positive influence of natural convection. Part of the solar energy is accumulated in the soil (under the “bottom” of the dryer, which is spread out the blackened roll paper), extending the day drying cycle for 5-6 hours. The productivity of the device, despite its apparent “slaveselect”, 0,3—0,5 kg of dried fruit per day per square meter lucioperka surface.
Design heliodryer at first glance little different from the traditional “film” greenhouses. In fact, the same box with a vaulted roof made of transparent synthetic on a rigid frame. The material for the manufacture of the boards — any. For example, boards of suitable size. Connected to each other by means of thorns, reinforced metal corners (not shown on the picture), they form strong, oriented lucioperka surface of the sun the skeleton for attaching to it other elements.