From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

---
 3831/CH13/EX13.15/Ex13_15.sce | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 3831/CH13/EX13.15/Ex13_15.sce

(limited to '3831/CH13/EX13.15/Ex13_15.sce')

diff --git a/3831/CH13/EX13.15/Ex13_15.sce b/3831/CH13/EX13.15/Ex13_15.sce
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+// Example 13_15
+clc;funcprot(0);
+// Given data
+CR=9/1;// The compression ratio
+Qbym=20.0*10^3;// Btu/lbm
+AbyF_mass=16.0/1;
+T_3=60;// °F
+p_3=8.00;// psia
+c_va=0.172;// Btu/(lbm air.R)
+D=260;// The total displacement in in^3
+N=4000;// rpm
+c=2;// The number of crankshaft revolutions per power stroke
+W_Bout=85.0;// hp
+k=1.40;// The specific heat ratio
+R=0.0685;// Btu/(lbm.R)
+
+// Calculation
+// (a)
+n_T_c=(1-(CR^(1-k)))*100;// %
+// (b)
+T_4s=(T_3+459.67)*(CR^(k-1));// R
+T_max=T_4s+(Qbym/(AbyF_mass*c_va));// R
+p_4s=p_3*((T_4s/(T_3+459.67))^(k/(k-1)));// psia
+T_1=T_max;// R
+p_max=p_4s*(T_1/T_4s);// psia
+p_1=p_max;// psia
+// (c)
+W_Iout=((n_T_c/100)*Qbym*D*N*p_1/c)/(AbyF_mass*R*T_1*(CR-1)*12*60);// ft.lbf/s
+W_Iout=W_Iout/550.0;// hp
+// (d)
+n_m=(W_Bout/W_Iout)*100;// The mechanical efficiency of the engine in %
+// (e)
+n_T_act=((n_m/100)*(n_T_c/100))*100;// The actual thermal efficiency of the engine in %
+printf("\n(a)Cold ASC thermal efficiency of the engine,n_T=%2.1f percentage \n(b)Maximum pressure and temperature of the cycle,p_max=%4.0f psia & T_max=%4.0f R \n(c)Indicated power output of the engine,|W_I|_out=%3.0f hp \n(d)Mechanical efficiency of the engine,n_m=%2.1f percentage \n(e)Actual thermal efficiency of the engine,n_T=%2.1f percentage",n_T_c,p_max,T_max,W_Iout,n_m,n_T_act);
+// The answer vary due to round off error
+
-- 
cgit