室内汚染空気の換気について(第4報) : 不均一な室内汚染空気の換気に関する理論式の考察(その3)

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The present investigation was undertaken to apply a theoretical method to the ventilation of the polluted air in room where carbondioxide in room was not completely diffused. R is defined to be equal to C/C^^-, where C^^- and C are the average carbondioxide concentration in a room and the carbondioxide concentration at a spontaneous place in room, respectively. Assuming that the value of R depends on time and place, the following equation can be obtained. ∂R/∂t=[∂/∂x] [K∂R/∂x] where x is a distance from a source of the evolution of carbondioxide, t is time, and K is a constant (not equal to 0). Implicit difference analogue for the above equation can be obtained as follows, [R (t+Δt)_n-R (t)_n]/Δt=[K/Δx] [{R (t)_<n+Δx>-R (t)_n}/Δx-{R (t)_n-R (t)_<n-Δx>}/Δx]=[K/(Δx)^2] [R (t)_<n+Δx>-2R (t)_n+R (t)_<n-Δx>] where R (t)_n and R (t+Δt)_n are the R values at t and (t+Δt) in a place n, respectively, R (t)_<n+Δx> and R (t)_<n-Δx> are the R values at time t in place (n+Δx) and (n-Δx), respectively. A place of the source of crbon dioxide, (n-Δx), n and (n+Δx) are on a straight line in room, n is a center of a diagonal of room and the distance from a source of the carbon dioxide evolution to n is 7.80m, and Δx=5.50m. Assuming that the value of R at n is equal to 1 without regard to tim, or R (0)_n=R (1)_n=………=R (t)_n=R (t+Δt)_n=1 it will be noted that a following equation is obtained, R (t)_<n+Δx>+R (t)_<n-Δx>=2R (t)_n=2…………………(1) It was found experimentally that the equation (1) was appropriate from the value of R at place of (n+Δx) and (n-Δx).
公益社団法人日本薬学会の論文
1968-02-29

室内汚染空気の換気について(第4報) : 不均一な室内汚染空気の換気に関する理論式の考察(その3)

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