A flat plate solar collector glass with a surface area of 1.9 m² has direct solar radiation of 789 W / m². If the effective absorptance-transmittance factor is 0.95, the average collector absorber surface temperature is 62 ° C, the water outlet temperature of the collector is 40 ° C and the collector efficiency is 55%, calculate the average heat loss coefficient of the collector [W / (m² ° C)].
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