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+//Example 3_19 page no:240
+clc;
+//given
+vol = 3000;
+t1 = 4.5;//in C
+t2 = 18.5;//in C
+h1 = 75;//in percentage
+h2 = 60;//in percentage
+eng_for_1cm = 1.22 * 10^3;
+eng = eng_for_1cm *vol * 14;
+eng = eng/(3.6*10 ^ 6);//converting to kW
+moist = 0.00440;//in kgm^-3
+latent_heat = 2450 * 10 ^ 3;
+weight_of_moist = moist * vol;
+heat_req = latent_heat * weight_of_moist;
+heat_req = heat_req/(3.6*10^6);
+tot_heat_req = eng + heat_req;
+disp(tot_heat_req,"the total heat requirement is (in kW)");