Question

Data for a flat plate collector used for heating are given below: Factor Specification Location and latitude Coimbatore 11000`N Day and time march 22, 14.30 to15.30 (IST) Average intensity of solar radiation 560 W/m2 Collector tilt 260 Number of glass cover 2 Heat removal factor for collector 0.82 Transmittance of glass 0.88 Absorptance of the plat 0.93 UL for collector 7.95 W/m20C Collector fluid temperature 750C Ambient temperature 250C . Calculate: (i) Solar attitude angle (ii) incident angle (iii) collector efficiency

Answer 1

Answer:

3.4. Data for a flat-plate colktor ased for heating are given below Specification Coimbatore 11° 00' N March 22, 14.30 15.30 (LST) Factor Localion and latitude Day and time Average intensity of solar radiation Collector tilt No. of glass cover Heat removal factor for collector Transmittance of glass Absorptance of the plate Top loss coefficient (U) for collector Collector fluid temperature Ambient temperature Calculate: 560 W/m .2 0.82 0.88 .0.93 25°C (i) Solar attitude angle, (ii) Incident angle, and (iii) Collector efficiency. [Ans. 43.9°, 46.1°, 8.87%)

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