Chapter 7, Problem 7.44P

Answer the problem correctly and provide complete and readable solutions. If you can explain the process (briefly), please do so. Thank you!

Pls. Answer this..? A steam engine has 10% brake thermal efficiency and consumes 750 kg/hr steam. The enthalpy of steam at the entrance ang exit of the engine and condenser are 2800 and 450 kj/kg repectively. Determine the brake power of the engine in kw.

A rigid tank of 5 m3contains nitrogen gas at 800 kPa, 700 K. By mistake someone lets 1.2 kg flow out. If the final temperature is 450 K what is then the final pressure?

When you get your all changed (assume "light oll"), the mechanic adds your dirty and hot 6 quarts of oll to the recycling drum. If your oil is 210 "F, and the drum already contains 4 gallons of oil at room temperature (65 °F), then: (a) What is the final temperature in the recycling drum? (b) What is the total change in entropy? Btu R F

2. Find the ratio of Mach no.s of an aircraft flies with a velocity greater by 39 m-s1 at 6000 m elevation, (T =- 43 C° at 6000 m) and (T =- 54 C° at 7000 m, M = 1.8). ju> lw da

Need both part please

A boiler feed pump operates at 40oC suction. If pump efficiency is 85% and needs 20 kW power of motor needed to drive the pump, find the maximum pressure of the boiler could attain for a mass of 2 kg/s.

i. A wind turbine has the following data: Downstream wind velocity = 9 m/s Upstream wind velocity =18 m/s Rotor Power output = 1 MW a. Compute the wind rotor efficiency. b. Calculate power in the wind and the length of the rotor blades ii. ComparethedifferenttypesBiogasplants?

b. The discharge pressure of an air compressor is 6 times the suction pressure. If the volumeflow rate at the suction is 0.86 cubic meters per second, what is the compressor power (kW)for n = 1.38 and suction pressure is 101 kPaa?