Concentrating collectors X and Y are constructed for heat generation. Both collectors have the same concentration factor of 14 and optical efficiency of 84.52%. The collector temperature is found to be 141.01 deg C for both collectors. For collector X, the incident solar irradiance is 775.37 W/m² and the heat transfer coefficient is 2.92 For collector Y, the heat transfer m-C Determine the incident solar irradiance on collector Y in W/m, if it has coefficient is 4.33 m2. C the same efficiency as collector X. The ambient air temperature is 25 deg C.

Concentrating collectors X and Y are constructed for heat generation. Both collectors have the same concentration factor of 14 and optical efficiency of 84.52%. The collector temperature is found to be 141.01 deg C for both collectors. For collector X, the incident solar irradiance is 775.37 W/m² and the heat transfer coefficient is 2.92 For collector Y, the heat transfer m-C Determine the incident solar irradiance on collector Y in W/m, if it has coefficient is 4.33 m2. C the same efficiency as collector X. The ambient air temperature is 25 deg C.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.35P

See similar textbooks

Similar questions

Determine the rate of radiant heat emission in watts per square meter from a blackbody at (a) 15C, (b) 600C, and (c) 5700C.
1.26 Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal to the emittance) of 0.1. Then determine the rate of evaporation of the liquid oxygen in kilograms per second and pounds per hour, assuming that convection can be neglected. The heat of vaporization of oxygen at –183°C is .
11.31 A large slab of steel 0.1 m thick contains a 0.1 -m-di- ameter circular hole whose axis is normal to the surface. Considering the sides of the hole to be black, specify the rate of radiative heat loss from the hole. The plate is at 811 K, and the surroundings are at 300 K.
1.28 The sun has a radius of and approximates a blackbody with a surface temperature of about 5800 K. Calculate the total rate of radiation from the sun and the emitted radiation flux per square meter of surface area.
A long wire 0.7 mm in diameter with an emissivity of 0.9 is placed in a large quiescent air space at 270 K. If the wire is at 800 K, calculate the net rate of heat loss. Discuss your assumptions.
A radiator in a domestic heating system operates at a surface temperature of 55°C. Assuming the radiator behaves as a black body, the rate at which it emits the radiant heat per unit area is (assume o = 5.67 x 10-8 W/m²K4)
A sphere has a radius of 0.100 m. Its surface can be treated as a greysurface with emissivity 0.20 and a uniform temperature of 19 degrees C. It isplaced in a room where the room surfaces are at an averagetemperature of 18 degrees C. The air in the room is at 20 degrees C. Determine the totalheat transfer rate to/from the sphere if its convective heat transfercoefficient is 3.0 W/m^2K. (The surface area of a sphere is 4πr^2.) The answer is 0.236W Equations to help: Heat Transfer by convection: Q = Ahc(Tf-Ts) Heat Transfer by radiation: Q = Aεσ(T^4(1)-T^4(2))
Calculate the ratio of the radiant energy emitted from a surface at 37ºC and an adjacent surface of equal area and emissivity at 35ºC.