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Diffstat (limited to '2510/CH19/EX19.18/Ex19_18.sce')
| -rwxr-xr-x | 2510/CH19/EX19.18/Ex19_18.sce | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/2510/CH19/EX19.18/Ex19_18.sce b/2510/CH19/EX19.18/Ex19_18.sce new file mode 100755 index 000000000..74fe78441 --- /dev/null +++ b/2510/CH19/EX19.18/Ex19_18.sce @@ -0,0 +1,17 @@ +//Variable declaration: +Lf = 6/12 //Length of firebrick (ft) +kf = 0.61 //Thermal conductivity of firebrick (Btu/h.ft. F) +A = 480 //Surface area of wall (ft^2) +Lw = 8/12 //Length of rock wool (ft) +kw = 0.023 //Thermal conductivity of rock wool (Btu/h.ft. F) +T1 = 1900 //Temperature of insulation of firebrick ( F) +T2 = 140 //Temperature of insulation of rock wool ( F) + +//Calculation: +Rf = Lf/(kf*A) //Resistance of firebrick (h. F/Btu) +Rw = Lw/(kw*A) //Resistance of rock wool (h. F/Btu) +R = Rf+Rw //Total resitance (h. F/Btu) +Q = (T1-T2)/R //Heat loss through the wall (Btu/h) + +//Result: +printf("The heat loss through the wall is : %.0f Btu/h .",Q) |