ANALISIS UNJUK KERJA KOLEKTOR SURYA PELAT DATAR DENGAN PENAMBAHAN SIRIP BERLUBANG BERDIAMETER BEDA SEBAGAI NOSEL YANG DISUSUN SECARA STAGGERED
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Abstract
The solar collector is a device that collects solar radiation and converts it into useful heat
energy. Several types of solar collectors include the parallel flow flat plate solar collector and the
perpendicular flow absorber plate solar collector. Previous design of flat plate solar collector
perpendicular flow absorber plate usually uses plates with the same hole diameter. To improve the
performance of this solar collector, modifications have been made by adding perforated fins with
different diameters which are arranged staggeredly as an air flow channel or nozzle. The intended
modification of nozzle diameter is to make the nozzle diameter size different from the large diameter near
the inlet to the small diameter near the oulet and compared to the reverse nozzle position. Making the
diameter of the nozzle near the inlet is larger than the diameter of the hole near the outlet aims to make
the mass flow of air passing through the hole near the inlet larger, so that the flow of air masses
experiences more heat transfer while the diameter of the hole near the outlet is made small is to reduce
the mass flow of air which is wasted faster through the outlet channel. With the variation of the hole
diameter from large to small, it is expected that the heat transfer that occurs in the solar collector will be
more optimal, but it should also be seen in the reverse position. The research was carried out
experimentally. The results of his research show that the useful energy and efficiency of solar collectors
with large to small diameter slotted fins are higher than those with small to large diameter slotted fins.
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