Transparent Inflatable Column Film Dome for Nuclear Stations, Stadiums, and Cities

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 𝑡₁ = +20°C, outside are 𝑡₂ = −10, −30, −50°C; reflectivity coefficient of mirror is 𝑐₂ = 0.9; coefficient transparency of film is 𝑐₁ = 0.9; convectively coefficients are 𝛼₁ = 𝛼₂ = 30; thickness of film layers are 𝛿₁ = 𝛿₂ = 0.0001 m; thickness of air layer is δ = 1 m; coefficient of film heat transfer is 𝜆₁ = 𝜆₃ = 0.75, for air 𝜆₂ = 0.0244; ratio of cover blackness 𝜀₁ = 𝜀₃ = 0.9; for louvers, 𝜀₂=0.05.