This paper provides a weighting function for solar radiation and prediction of air temperatures in the glasshouse by superposition of responses to outside air temperature, effective radiation, and solar radiation.
It is found that computed values and experimental results are in tolerably good agreement with each other in spite of several assumptions. Temperature rise due to solar radiation changes according to the change of absorption coefficient of glass (∉₄) and heat transfer coefficient of outside glass surface (1/R_0g) . A large amount of temperature rise in the daytime occurs when ∉₄ is large, while a slight dip exists in the nighttime at R_0g=0.111 (m²hr•deg C•kcal^-1) . So-called heat-absorbing effect of a specified glass appears when R_0g is small.