Peter_1
31-01-2007, 12:37 PM
We use for the calculation of the friction loss along the lines the formula
Dp = Re x L x rho x V(square) /d/2 where rho is the density of the refrigerant in that line, d= inner diameter, L = length of the line (and additional the equivalent length of the bends in this line) and Re the Reynolds number of the used copper.
Literarture I have gives me Re numbers from 0.015 to 0.035 (or a differencee of +/- 250% which can give me a friction loss difference of 250%)
Does anyone have more accurate numbers because you then better guess the friction loss?
Or does someone use another formula to calculate this?
Dp = Re x L x rho x V(square) /d/2 where rho is the density of the refrigerant in that line, d= inner diameter, L = length of the line (and additional the equivalent length of the bends in this line) and Re the Reynolds number of the used copper.
Literarture I have gives me Re numbers from 0.015 to 0.035 (or a differencee of +/- 250% which can give me a friction loss difference of 250%)
Does anyone have more accurate numbers because you then better guess the friction loss?
Or does someone use another formula to calculate this?