I am trying to make a program to calculate heat balance of a hollow black sphere which is under sun. So I have to add direct solar radiation, diffuse solar radiation, longwave sky radiation and longwave radiation from surrounding surfaces as radiation input on the sphere and radiation out would...
well Ashereng for your concern, black globe is a device widely use to estimate radiation temperature which can be used with air temperature to measure thermal comfort temperature both for indoor and outdoor spaces.Its a topic of architecture concern about human thermal environment. thanks
25362 thanks for your tips. Infact I m gonna make a program to calculate heat balance of a hollow black sphere which is under sun. So I have to add direct solar radiation, diffuse solar radiation, longwave sky radiation and longwave radiation from surrounding surfaces as radiation input on the...
ty folks. but I forgot to mention air is blowing at 5 m/s around the hollow sphere and I calculated htc which is around 130 W/m^2.K. so how much heat will loss? isn't it hct*10*A where A is the surface area of the sphere?
I am looking for heat transfer from a heated hollow sphere to air by convection. say sphere temperature is 40 deg air temperature is 30. what would be convective heat transfer coeffeicent for sphere? how much heat will removed from the air if sphere diameter is .15 meter?
