Steam @ 400 C and 1600 kPa enters a nozzle at a velocity of 28 m/s and leaves as saturated vapor at 100 kPa, steam experiences a heat loss of 46.6 kg/s to the surroundings which are at 25 C. What is the actual exit velocity (m/s)?
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- can you please solve this for me, thanks. 10 kg/s of steam (H2O) enters a turbine at 10 m/s and a specific enthalpy of 3500 kJ/kg and leaves at an outlet 10m below the inlet with a specific enthalpy of 2500 kJ/kg and a velocity of 20 m/s. Assume steady-state steady-flow. If the heat lost from the turbine is 20% that of the turbine work, determine a.) the turbine horsepower. If the turbine is coupled to a generator with a 90% electrical efficiency, and the turbine horsepower has an 80% mechanical efficiency, b.) how much income will a power plant generate in one year if the electrical energy is sold at PhP 3.51 per kW-hr? (Hint: Mechanical efficiency = actual turbine work / ideal turbine work. Electrical efficiency of a generator = electrical output / actual turbine work.)with an enthalpy of 600 Kj and velocity of 250 m/s, a 4kg of air enters a turbine. The enthalpy at exit is 395 Kj and velocity of 170m/s. What is the work developed if there is a heat loss of 10kj [ Got answer 262.2 kJ ]Water enters a boiler at 18.33 °C and 137.9 kPa through a pipe at an average velocityof 1.52 m/s. Exit stream at a height of 15.2 m above the liquid inlet leaves at 137.9 kPaand 148.9 °C at 9.14 m/s in the outlet line. At steady-state, how much heat must beadded per kg mass of steam? The flow in the pipe is turbulent.
- Steam flows through a turbine at the rate of 100 lb/min with ∆KE = 0 and Q = 0. At entry, its pressure is 175 psia, its volume is 3.16 ft3/lb, and its internal energy is 1166.7 Btu/lb. At exit, its pressure is 0.813 psia, its volume is 328 ft3/lb, and its internal energy is 854.6 Btu/lb. What horsepower is developed? (b) The same as (a) except that the heat loss from the turbine is 10 Btu/lb of steam.A turbine is driven by a system that enters the turbine at the ff. conditions: 500 kg/h, 44 atm, 450 deg C, 60 m/s linear speed. The steam exits at a point five meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 360 m/s speed. 70,000 W of shaft work is delivered by the turbine while 104 kilocalories/h heat is lost. Why is expansion work 0 and why cannot the flow work be calculated?A twin-cylinder, double-acting,compressor with a clearance of 5% draws in oxygen at 450 kpa,17c and discharges it at 1800 kpa. The mass flow rate is 20 kg/min, compression and expansion are polytropic with n=1.25. Find (a) the work,(b)the heat transferred and (c) the bore and stroke for 100 rpm and L/D =1.20. Ans (a)-40.23 kw, (b) -829kj/min / (c)21.71x25.76 cm
- A twin-cylinder, double- acting, compressor with a clearance of 5% draws in oxygen at 450 kPa, 17°C, and discharges it at 1800 kPa. The mass flow rate is 20kg/min, compression and expansion are polytropic with n= 1.25. Find (a) the work, (b) the heat transferred, and (c) the bore and stroke for 100 rpm and L/D= 1.20. Answer: (a) -40.23 kW, (b) -829 kJ/min (c) 21.71 x 25.76 cmA fluid flows into a nozzle at T = 673.15 K and P = 0.80 MPa (H = 3267.7 kJ/kg, V =0.38429 m3/kg) with a u = 10 m/s. It exits at T = 573 K and P = 0.20 MPa (H = 3072.1 kJ/kg, V =1.31623 m3/kg). Heat at the amount of 25 kW is lost in the process. If the inlet has an area of 0.08 m2, what is the velocity u at the exit (in m/s)? a.606 b.625 c.644 d.556an air flow is brought from 20 degree celsius, 100 kPa to 1000 kPa, 330 degree celsius by an adiabatic compressor driven by 50 kW motor. what are the mass flow rate and the exit volume flow rate of air?
- Air enters a blower at 20°C and exits at 28.38°C. The inlet velocities of air are 100 m/s and 150 m/s respectively. Find the mass flow rate if the blower consumes a power of 15 kW, assuming adiabaticconditions. Take cp of air is 1.005 kJ/kg-K. Need answers and solutions. ASAP...Provide complete solution and detailed diagram. Steam at 4 Mpa and 300oC enters a turbine and expands isentropically to 100 Kpa. Find theturbine work. At 4 Mpa and 300oC: h = 2960.7, s = 6.3615 At 0.10 Mpa: sf = 1.3026, sfg =6.0568, hf = 417.46, hfg = 2258 A. 234.56 KJ/kg B. 657.26 KJ/kg C. 345.66 KJ/kg D. 543.45 KJ/kg8.5kg/s of of air are compressed isothermally from 90kPa 8m3/s to 600kPa. If the Initial and final velocity of the gas is 15m/s and 50m/s with negligible changes in potential energy, Find the Work steady flow(kW)