initial commit / add all books

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+//Ques 3

+//To determine the efficiency of a cycle

+clc

+clear

+//1-Inlet state of pump

+//2-Exit state of pump

+P2=4000;//Exit pressure in kPa

+P1=10;//Inlet pressure in kPa

+v=0.00101;//specific weight of water in m^3/kg

+wp=v*(P2-P1);//work done in pipe in kJ/kg

+h1=191.8;//Enthalpy in kJ/kg from table

+h2=h1+wp;//enthalpy in kJ/kg

+//2-Inlet state for boiler

+//3-Exit state for Boiler

+h3=3213.6;//Enthalpy in kJ/kg from table

+//3-Inlet state for high pressure turbine

+//4-Exit state for high pressure turbine

+//s3=s4(Entropy remain same)

+s4=6.7690;//Entropy in kJ/kg from table

+sf=1.7766;//Entropy at liquid state in kJ/kg from table

+sfg=5.1193;//Entropy difference for vapor and liquid state in kJ/kg from table

+x4=(s4-sf)/sfg;//x-factor

+hf=604.7//Enthalpy of liquid state in kJ/kg

+hfg=2133.8;//Enthalpy difference in kJ/kg for turbine

+h4=hf+x4*hfg;//Enthalpy in kJ/kg

+//5-Inlet state for low pressure turbine

+//6-Exit pressure for low pressure turbine

+sf=0.6493;//Entropy in liquid state in kJ/kg for turbine

+h5=3273.4;//enthalpy in kJ/kg 

+s5=7.8985;//Entropy in kJ/kg

+sfg=7.5009;//entropy diff in kJ/kg 

+x6=(s5-sf)/sfg;//x-factor

+hfg=2392.8;//enthalpy difference for low pressure turbine in kj/kg

+h6=h1+x6*hfg;//entropy in kg/kg

+wt=(h3-h4)+(h5-h6);//work output in kJ/kg

+qh=(h3-h2)+(h5-h4);

+

+nth=(wt-wp)/qh;

+printf('Percentage efficiency = %.1f ',nth*100);
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