A CPC has an acceptance half angle of 16° and its long axis is oriented along the east-west lirection with a tilt of 45°. The collector is located at a latitude of 35°N where on March 10 at 1:00 to 2:00 pm, the beam radiation on the horizontal is 1.3 MJ/m² and the diffuse is 0.4 MJ/m². A single glass cover is used on the concentrator, with KL=0.032. Estimate the absorbed radiation for the hour indicated if specular reflectivity is 0.85 and the absorptivity ralues are 0.96 at normal incidence, 0.95 at incidence angle of 20°, 0.94 at 40°, and 0.89 at 50°. What is the useful energy output of the collector per unit aperture area if the overall neat loss coefficient is 7 W/m² K, the heat removal factor is 0.88, the ambient temperature

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A CPC has an acceptance half angle of 16° and its long axis is oriented along the east-west
direction with a tilt of 45°. The collector is located at a latitude of 35°N where on March
10 at 1:00 to 2:00 pm, the beam radiation on the horizontal is 1.3 MJ/m? and the diffuse is
0.4 MJ/m². A single glass cover is used on the concentrator, with KL=0.032. Estimate the
absorbed radiation for the hour indicated if specular reflectivity is 0.85 and the absorptivity
values are 0.96 at normal incidence, 0.95 at incidence angle of 20°, 0.94 at 40°, and 0.89 at
60°. What is the useful energy output of the collector per unit aperture area if the overall
heat loss coefficient is 7 W/m? K, the heat removal factor is 0.88, the ambient temperature
is 10 °C, and the inlet fluid temperature is 55 °C?
Transcribed Image Text:A CPC has an acceptance half angle of 16° and its long axis is oriented along the east-west direction with a tilt of 45°. The collector is located at a latitude of 35°N where on March 10 at 1:00 to 2:00 pm, the beam radiation on the horizontal is 1.3 MJ/m? and the diffuse is 0.4 MJ/m². A single glass cover is used on the concentrator, with KL=0.032. Estimate the absorbed radiation for the hour indicated if specular reflectivity is 0.85 and the absorptivity values are 0.96 at normal incidence, 0.95 at incidence angle of 20°, 0.94 at 40°, and 0.89 at 60°. What is the useful energy output of the collector per unit aperture area if the overall heat loss coefficient is 7 W/m? K, the heat removal factor is 0.88, the ambient temperature is 10 °C, and the inlet fluid temperature is 55 °C?
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