diff options
Diffstat (limited to '3878/CH29/EX29.1/Ex29_1.sce')
| -rw-r--r-- | 3878/CH29/EX29.1/Ex29_1.sce | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/3878/CH29/EX29.1/Ex29_1.sce b/3878/CH29/EX29.1/Ex29_1.sce new file mode 100644 index 000000000..eb2500755 --- /dev/null +++ b/3878/CH29/EX29.1/Ex29_1.sce @@ -0,0 +1,15 @@ +clear +// +// Variable declaration +T_e=3// The evaporating temperature in °C +T_in=20// The temperature of air entering coil in °C +T_out=11// The temperature of air off coil at full air flow in °C +T_c=35// The condensing temperature in °C +af=(1-0.15)// The reduced air flow + +// Calculation +LMTD=((T_in-T_e)-(T_out-T_e))/log((T_in-T_e)/(T_out-T_e))// K +T_aoff=T_in-(T_in-T_out)/af// Air off coil at 85% air flow (°C) +Cp=(af)**0.8// Coil performance at 85% air flow (°C) +LMTD_85=LMTD/Cp// LMTD at 85% air flow in K +printf("\n \n LMTD at 85 percentage air flow=%2.1f K(error)",LMTD_85) |