Engineering, 26.11.2019 01:31 maru91

Afuel oil is burned with air in a boiler furnace. the combustion produces 813 kw of thermal energy of which 65z5 is transferred as heat to the boiler tubes that pass through the furnace. the combustion products pass from the furnace to a stack at 650 deg c. liquid water enters the boiler tubes at 20 deg c and leaves the tubes as saturated steam at 20 bar absolute. (a) calculate the rate (kg/sec) at which steam is produced. (b) estimate the volumetric flow rate of steam produced (m^3/sec) using the steam tables. (c) repeat part (b) using the ideal gas law. which result would you trust more, and why? (d) what happened to the 35% of the combustion energy that did not get transferred to the boiler tubes?

Answers: 2

Show answers

Another question on Engineering

Engineering, 04.07.2019 16:10

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Answers: 1

Answer

Engineering, 04.07.2019 18:10

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Answers: 2

Answer

Engineering, 04.07.2019 18:10

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Answers: 3

Answer

You know the right answer?

Afuel oil is burned with air in a boiler furnace. the combustion produces 813 kw of thermal energy o...

Questions