From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 2063/CH9/EX9.2/9_2.sce | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100755 2063/CH9/EX9.2/9_2.sce

(limited to '2063/CH9/EX9.2/9_2.sce')

diff --git a/2063/CH9/EX9.2/9_2.sce b/2063/CH9/EX9.2/9_2.sce
new file mode 100755
index 000000000..16640a00c
--- /dev/null
+++ b/2063/CH9/EX9.2/9_2.sce
@@ -0,0 +1,20 @@
+clc
+clear
+//Input data
+Pi=60000;//Indicated power of a double acting air compressor in W
+P1=1;//Initial pressure in bar
+T1=293;//Initial temperature in K
+n=1.2;//Polytropic index of the process
+P2=8;//Final pressure in bar
+N=120;//Speed at which the cylinder operates in rpm
+S=150;//Average piston speed in m/min
+
+//Calculations
+L=S/(2*N);//Length of the stroke in m
+X=(3.14*L)/4;//X=V/D^2 i.e.,Volume of air before compression/square of the diameter in m
+Y=((n/(n-1))*P1*10^5*X*(((P2/P1)^((n-1)/n))-1));//Y=W/D^2 Work done by the compressor per cycle in N/m
+Nw=2*N;//Number of working strokes per minute since it is a double acting cylinder
+D=(((Pi*60)/(Y*Nw))^(0.5))*1000;//Diameter of the cylinder in mm
+
+//Output
+printf('(a)Length of the cylinder is %3.3f m \n (b)Diameter of the cylinder is %3.0f mm',L,D)
-- 
cgit