Abstract
The temperature condition in a snow-covered, unheated greenhouse shown in Fig. 1 is investigated.
The measurements of solar radiation, air temperature and glass surface temperature were made from the end of December to the beginning of March. 1968.
An average inside air temperature was determined from the data at nine positions distributed uniformly in the space of the greenhouse.
The typical results of this experiment are indicated in Figs. 2, 3, 4, 5 and 6. Overall transmission coefficient of the greenhouse (Rall) was calculated from the solar radiation data, which was 0.62. Temperature measurements inside and outside show that the amplitude of daily temperature variation on cold and clear days is greater than that of snowy days. It also indicates that the wall surface temperature is lower than that of the roof (fig. 6).
Therefore, it seems that the roof temperature is greatly affected by the accumulation of snow.
