Data on the construction of a mathmatical model to test the optimisation of the air gap spacing in a solar water heater with double glass cover ANSYS 13.0-Fluent software files.

ANSYS 13.0-Fluent software files on the construction of a mathematical model to test the optimisation of the air gap spacing in a solar water heater with double glass cover. Twelve cases were modelled as the lower gap and top gap were changed. The air velocity, temperature of the top glass and temperature of lower glass at eight nodes is given as the air gap changed.