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

---
 32/CH11/EX11.20/11_20.sce | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 32/CH11/EX11.20/11_20.sce

(limited to '32/CH11/EX11.20')

diff --git a/32/CH11/EX11.20/11_20.sce b/32/CH11/EX11.20/11_20.sce
new file mode 100755
index 000000000..e729be4bc
--- /dev/null
+++ b/32/CH11/EX11.20/11_20.sce
@@ -0,0 +1,36 @@
+//pathname=get_absolute_file_path('11.20.sce')
+//filename=pathname+filesep()+'11.20-data.sci'
+//exec(filename)
+//Height of chimney(in m):
+H=45
+//Temperature of burnt gases(in K):
+Tg=630
+//Air requirement(in kg air per kg of fuel burnt):
+m=15
+//Ambient air temperature(in K):
+Ta=300
+//Minimum temperatre of artificial draught(in K):
+Tga=150+273
+//Specific heat of flue gases(in kJ/kg.K):
+Cpg=1.005
+//Calorific value of fuel(in kJ/kg):
+C=30000
+//Draught (in mm of water column):
+hw=353*H*(1/Ta-(m+1)/(m*Tg))
+//Draught (in metres of hot gas column):
+hg=H*(m/(m+1)*Tg/Ta-1)
+//Temperature of chimney for maximum discharge(in K):
+Tgmax=Ta*2*(m+1)/m
+//Chimney efficiency:
+n=9.81*H*(m/(m+1)*Tg/Ta-1)/(Cpg*(Tg-Tga)*10^3)*100
+//Extra heat carried away by flue gases(in kJ):
+Q=(m+1)*Cpg*(Tg-Tga)
+//Percentage heat spent in natural draught:
+nn=Q/C*100
+printf("\n RESULT \n")
+printf("\nDraught = %f mm of water",hw)
+printf("\nDraught = %f metres of hotgas column",hg)
+printf("\nTemperature of chimney gases for maximum discharge = %d K",Tgmax)
+printf("\nChimney efficiency = %f percent",n)
+printf("\nExtra heat carried away by flue gases per kg of fuel burnt = %f kJ",Q)
+printf("\nPercentage heat carried away in natural draught = %f percent",nn)
\ No newline at end of file
-- 
cgit