A boiler receives a constant flow of 5000 kg/h liquid water at 5 MPa, 20 C and it heats the flow such that the exit state is 450 C with a pressure of 4.5 MPa. Determine the necessary minimum pipe flow area in both the inlet and exit pipe(s) if there should be no velocities larger than 20 m/s.
DetailsA boiler feed pump delivers 0.05 m3/s of water at 240°C, 20 MPa. What is the mass flow rate (kg/s)? What if the properties of saturated liquid at 20 MPa were used? Solution 61 HPStep 1 of 4We are required to. Login Sign Up. Make up to $500 this semester by taking notes for StudySoup as an Elite Notetaker Apply Now.
Details5C-5 : Open Feedwater Heater: 6 pts: An open feedwater heater in a steam power plant operates at steady-state with liquid entering at T 1 = 40 o C and P 1 = 7 bar. Water vapor at T 2 = 200 o C and P 2 = 7 bar enters in a second feed stream. The effluent is saturated liquid water at P 3 = 7 bar. If heat exchange with the surroundings and changes in potential and kinetic energies are negligible
DetailsChapter 10 is worth 35 points (5 points per problem) Problem 10.3 For the centrifugal pump shown in Fig. 10.13 and an impeller diameter of 6-1/8 in., determine the head, efficiency, and the brake horsepower for a discharge of 400 gpm. Should this pump be recommended for these flow conditions? Solution to 10.3. h = 130 ft +/- 5 ft efficiency = 80.5%
DetailsSince the R-134a must give heat transfer out to the kitchen air at 20oC, it must at least be that hot at state 3. From Table B.5.1: P3 = P2 = Psat = 573 kPa is minimum high P. Since the R-134a must absorb heat transfer at the freezers –5oC, it must at least be that cold at state 4. From Table B.5.1: P1 = P4 = Psat = 245 kPa is maximum low P. 11.f
Details2-6. A boiler feedwater pump receives 2800 gpm of saturated water at 130 psia and discharges at 1900 psia. The pump has an efficiency of 80%. Calculate the pump power and the temperature of the water leaving the pump. The boiler feedwater pump in Problem 2 …
DetailsA pump delivers gasoline at 20°C and 12 m3/h.At the inlet, p1 = 100 kPa, z1 = 1 m, and V1 = 2 m/s.At the exit p2 = 500 kPa, z2 = 4 m, and V2 = 3 m/s. How much power is required if the motor efficiency is 75%? View Answer
DetailsThe boiler evaporates 3200 kg of water at 44.5 o C into superheated steam at a pressure of 12 bar and 274.5 o C. If the calorific value of the fuel is 32760 kJ/kg, determine (a) equivalent evaporation “from and at 100 o C”; (b) the thermal efficiency of the boiler.
DetailsUnformatted text preview: 11.41 A feedwater heater that supplies a boiler consists of a shell—and-tube heat exchanger with one shell pass and We.One hundred thin-walled tubes each have a diameter of 20 mm and a length (per pass) of 2 111. Under normal operating conditions water enters \ 1 the tubes at 10 kg/s and 290K and is heated by eona ' densing saturated steam at 1 atm on the outer
DetailsIf boiler and boiler feed unit are on the same floor, enter a value of "0" (zero) for feet of head. If boiler is located on a floor above the boiler feed unit, enter vertical height (in feet) from the pump discharge of the boiler feed pump up to the inlet piping on the boiler.
DetailsConsider an ideal steam reheat cycle where steam enters the high-pressure turbine at 4.0 MPa, 400 C, amd then expands to 0.8 MPa. It is then reheated to 400 C and expands to 10 kPa in the low-pressure turbine. Calculate the cycle thermal efﬁciency and the moisture content of the stea m leaving the low-pressure turbine.
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