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Diffstat (limited to '3681/CH4/EX4.22/Ex4_22.sce')
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1 files changed, 21 insertions, 0 deletions
diff --git a/3681/CH4/EX4.22/Ex4_22.sce b/3681/CH4/EX4.22/Ex4_22.sce new file mode 100644 index 000000000..ee640b754 --- /dev/null +++ b/3681/CH4/EX4.22/Ex4_22.sce @@ -0,0 +1,21 @@ +// Calculating the volume of air required per second and fan power
+clc;
+disp('Example 4.22, Page No. = 4.50')
+// Given Data
+MVA = 50;// MVA rating of turbo-alternator
+Q = 1500;// Total loss (in kW)
+Ti = 25;// Inlet temperature of air (in degree celsius)
+T = 30;// Temperature limit (in degree celsius)
+H = 760;// Baromatric height (in mm of mercury)
+P = 2000;// Pressure (in N per meter square)
+nf = 0.4;// Fan efficiency
+// Assumption
+cp = 995;// Specific heat of air at constant pressure (in J per kg per degree celsius)
+V = 0.775;// Volume of 1 kg of air at N.T.P. (in meter cube)
+// Calculation of the volume of air required per second and fan power
+Va = (V*Q*10^(3)/(cp*T))*((Ti+273)/273)*(760/H);// Volume of air (in meter cube per second)
+Pf = (P*Va/nf)*10^(-3);// Fan power (in kW)
+disp(Va,'Volume of air (meter cube per second)=');
+disp(Pf,'Fan power (kW)=');
+//in book Va is equal to 42.6 (meter cube per second) and Pf is equal to 212.5 (kW). The answers vary due to round off error
+
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