1 files changed, 21 insertions, 0 deletions
diff --git a/3685/CH19/EX19.11/Ex19_11.sce b/3685/CH19/EX19.11/Ex19_11.sce
new file mode 100644
index 000000000..f87bf6152
--- /dev/null
+++ b/3685/CH19/EX19.11/Ex19_11.sce
@@ -0,0 +1,21 @@
+clc
+// Given that
+p1 = 1 // Intake pressure of compressor in bar
+T1 = 298 // Intake temperature in K
+p_d = 36 // Delivery pressure in bar
+T2 = 390 // Maximum temperature in any stage in K
+n = 1.3 // Polytropic index
+R = 0.287
+printf("\n Example 19.11\n")
+r = (T2/T1)^(n/(n-1))
+N = ceil(r)
+p2 = (p_d/p1)^(1/N)
+p3 = (p_d/p1)^(2/N)
+p4 = (p_d/p1)^(3/N)
+Wc = (N*n*R*T1/(n-1))*((p_d/p1)^((n-1)/(N*n))-1)
+Wc_ = (n/(n-1))*(1*R*T1)*((p_d/p1)^((n-1)/n)- 1)
+T = T1*((p2/p1)^((n-1)/n))
+printf("\n No of stages for min power input = %d,\n Power required = %f kW/kg air,\n The power required for a single stage compressor = %f kW,\n Maximum temperature in any stage = %f K",N,Wc,Wc_,T)
+//The answers given in the book contain round off error
+
+