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A collector has a maximum efficiency of 6 4 % . Calculate the collector loss coefficient if the stagnation temperature is 7 0 oC when

A collector has a maximum efficiency of

64 % .

Calculate the collector loss coefficient if the stagnation temperature is

70

oC when the radiation is

500

/

2

and the ambient temperature is

20

.

You can take Fr

= 0.9 .

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