a hot water boiler produces 0 2 kg s of hot water at 50 bar and 400oc from water at 50 bar and 100oc the boiler burns 5 3 m3 min of natu
APPLIED THERMODYNAMICS TUTORIAL 1 REVISION
SELF ASSESSMENT EXERCISE No.2 A back pressure steam cycle works as follows. The boiler produces 8 kg/s of steam at 40 bar and 500oC. This is expanded to 2 bar with an isentropic efficiency of 0.88. The pump is supplied with feed water at 0.5 bar and 30oC and delivers it to the boiler at 31oC and 40 bar. Calculate the net power output of the cycle.
Calculate the thermal efficiency of the boiler. 3.29/70.4 %) A steam boiler produces 3 kg/s at 70 bar and 500oC from water at 70 bar and 120oC.6 x 10-3 (kg/s) x 44 000 (kJ/kg) = 70.The boiler burns fuel oil at a rate of 1. 2 A steam boiler produces 0. h2 = 3196 kJ/kg The enthalpy of the water is found from the table at 50 bar and 100oC.V.
The liquid water has a mass of 1 kg. Using steam tables, calculate the mass of water vapor. Answer: A A. 3.16 kg B. 0.99 kg C. 1.57 kg D. 1.89 kg 108. Water substance at 70 bar and 65oC enters a boiler tube of constant inside diameter of 25 mm. The water leaves the boiler tube at 50 bar and 700 oK at velocity of 100 m/s.
Solution: From the definition of the specific volume V 0.5 v = m = 1 = 0.5 m3/kg V V 3 v = = n m/M = M v = 32 × 0.5 = 16 m /kmol Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which this textbook has been adopted.