Experimental and theoretical comparison between metallic and mirror reflectors with different receiver tank
Ihab Omar†, Alaa Alrudhan†, Karrar A. Hammoodi‡, Ameer mohammed ali†
† Refrigeration & Air-Conditioning Technical Engineering Department, College of Technical Engineering, The Islamic University Najaf, Iraq.
‡ Refrigeration & Air-Conditioning Technologies Department, College of Engineering, University of Warith Al-Anbiyaa.
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In this study, an experimental analysis of a parabolic dish collectors (PDC) has been done. Two models of (PDC) with different dimensions was introduced to study the effect of change reflected materials with different diameter of the dish and depth on the position of focus point, the temperature, pressure of outlet steam and concentration ratio by using several receivers. The parabolic dish solar collector (PSDC) was made from iron with different dimensions. In the first model, the experimental setup is made up of diameter (150cm), focus length (100cm), heat exchanger (radiator) receiver tank (37×47×4) cm3 and nickel sheet metal reflector with 1.767m2 aperture area. It was conducted at location in Karbala city at latitude 32.34o, longitude 44.03o and height 29m, Iraq. The second model is made up of diameter (200cm), focus length (90cm), cylindrical vessel with 13.369cm diameter and 39.5cm length and 567 pieces of mirrors reflector with 3.141m2 aperture area at location in Najaf city at latitude 31.57o, longitude 44.15o and height 50m, Iraq. For second model, it was observed that the temperature and pressure of steam 256% respectively comparing to the first one in April 2015 and in April 2018. The focal point temperature increased first then decreased after 12:00 pm. The mirror reflector is complex to set up on the parabolic dish and simply broken so that used metallic nickel sheet is more easily.