Glass is costlier and heavy, but has a long life. Acrylic is lighter and cheaper, but is affected by temperature,
UV radiations and the weather. Polycarbonate sheets are quite light and inexpensive and are used for agricultural
polyhouses, where their life span is taken as five years. The cost of constructing support structure for roof is taken as
20% of the material cost. With these assumptions, the cost of mounted collector i.e. a complete dryer assembly
(without drying chamber) with a 2mm thick glass roof is INR360/m2. That for 2mm thick acrylic is INR180/m2, and
of plastic used in polyhouse it is INR72/m2.
Glass is costlier and heavy, but has a long life. Acrylic is lighter and cheaper, but is affected by temperature,
UV radiations and the weather. Polycarbonate sheets are quite light and inexpensive and are used for agricultural
polyhouses, where their life span is taken as five years. The cost of constructing support structure for roof is taken as
20% of the material cost. With these assumptions, the cost of mounted collector i.e. a complete dryer assembly
(without drying chamber) with a 2mm thick glass roof is INR360/m2. That for 2mm thick acrylic is INR180/m2, and
of plastic used in polyhouse it is INR72/m2.
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