175492.fig.0013
Figure 13: Daily heat balance through 1 m2 of dome during the coldest winter day versus Earth’s latitude (Northern hemisphere example). Data used for computations (see (6)–(14)): temperature inside the dome is 𝑡 1 = +20°C, outside are 𝑡 2 = −10, −30, −50°C; reflectivity coefficient of mirror is 𝑐 2 = 0.9; coefficient transparency of film is 𝑐 1 = 0.9; convectively coefficients are 𝛼 1 = 𝛼 2 = 30; thickness of film layers are 𝛿 1 = 𝛿 2 = 0.0001 m; thickness of air layer is δ = 1 m; coefficient of film heat transfer is 𝜆 1 = 𝜆 3 = 0.75, for air 𝜆 2 = 0.0244; ratio of cover blackness 𝜀 1 = 𝜀 3 = 0.9; for louvers, 𝜀 2 = 0 . 0 5 .