The top side of the collector is closed with the transparent glass cover to allow the incident solar irradiation and to avoid the convection loss
to the ambient.
Nayak, "Numerical study of natural convection loss from open cavities," International Journal of Thermal Sciences, vol.
Pye, "Numerical investigation of natural convection loss from cavity receivers in solar dish applications," Journal of Solar Energy Engineering, vol.
Reflector ends are enclosed for maximum radiant heat output and minimum convection loss
, according to the company.
In accordance with PTC 4 is it permissible to adjust the radiation heat transfer coefficient by the ratio of the expected emissivity for the specific lagging material used, in this case 0.2 for aluminum, to 0.80, for the purposes of calculating the radiation and convection loss
Sheet-to-sheet Inconsistent materials, Inspect for convection loss
sag variation convective losses and/or eliminate drafts by due to drafts using screens, panels.
It can be seen that a flat plate collector will achieve a stagnation temperature above 300[degrees]C if the infrared emissivity is kept below 0.132 and there are no conduction and convection losses from the plate.
This further helped to limit and purposefully control convection losses from the ambient.
At quasi-steady state, the temperatures of tube and enclosure become almost equal and result in negligible convection losses
. Consider the following:
arise because the body loses heat to the air in contact with it.
This allows the panels to suppress convection losses
and maintain the fluid-flow entirely within the vacuum envelope.
Essentially, after steel is tapped into the ladle, heat is lost as steel "soaks" the refractory, bringing it closer in temperature to itself; via conduction through the walls of the ladle; and by radiation and convection losses
at the top surface of the slag/steel to the atmosphere, Peaslee said.