A solar collector for producing hot water with dimensions 2.0 m high and 1.5 m wide,...

 

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A solar collector for producing hot water with dimensions 2.0 m high and 1.5 m wide, and tilted 40° from the horizontal. Solar radiation is incident on the glass cover of a solar collector at a rate of 650 W/m?. The temperature of the glass cover is of 59°C on and the surrounding air temperature is of 35°C. The glass has transmissivity of 0.88 and emissivity of 0.90. Water enters the tubes attached to the absorber plate at a rate of I kg/min. Assuming the back surface of the absorber plate to be heavily insulated and the only heat loss occurs through the glass cover. Including radiation heat loss (surrounding temperature of 25°C) and using characteristic length, 4- ,in caleulation instead of length for Reynolds, Rayleigh and Nusselt numbers. The water inlet temperature is of 28.62°C, specific heat of water is of 4.180 kJ/(kg-"C) and the gravitational acceleration equal to 9.8065 m/s. Determine a) the natural convection heat loss from the collector, O. [W] b) the radiation heat loss from the collector, 1111111111 Absorber Plate Solar radiation 650 W/m T.- 35°C T- 25°C c) the heat transfer from the collector to water, Q [W] d) temperature rtise of water as it flows through the collector, T[C] 20m 8-3 cm Glass Cover, Insulation e) the collector efficiency, which is the ratio between amount of heat transferred or 59.0°C 0 -40 transmitted to the water and the solar energy incident on the collector, n.de [%]. A solar collector for producing hot water with dimensions 2.0 m high and 1.5 m wide, and tilted 40° from the horizontal. Solar radiation is incident on the glass cover of a solar collector at a rate of 650 W/m?. The temperature of the glass cover is of 59°C on and the surrounding air temperature is of 35°C. The glass has transmissivity of 0.88 and emissivity of 0.90. Water enters the tubes attached to the absorber plate at a rate of I kg/min. Assuming the back surface of the absorber plate to be heavily insulated and the only heat loss occurs through the glass cover. Including radiation heat loss (surrounding temperature of 25°C) and using characteristic length, 4- ,in caleulation instead of length for Reynolds, Rayleigh and Nusselt numbers. The water inlet temperature is of 28.62°C, specific heat of water is of 4.180 kJ/(kg-"C) and the gravitational acceleration equal to 9.8065 m/s. Determine a) the natural convection heat loss from the collector, O. [W] b) the radiation heat loss from the collector, 1111111111 Absorber Plate Solar radiation 650 W/m T.- 35°C T- 25°C c) the heat transfer from the collector to water, Q [W] d) temperature rtise of water as it flows through the collector, T[C] 20m 8-3 cm Glass Cover, Insulation e) the collector efficiency, which is the ratio between amount of heat transferred or 59.0°C 0 -40 transmitted to the water and the solar energy incident on the collector, n.de [%].

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Given Dimension 2mIS m 6 so Wm Talam or Trese 59c o... View the full answer