FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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A reheat cycle with two stages of reheating is executed with steam expanding initially from 25 mPa and 600 C. The two reheater pressures are 4 and 1 mPa and the steam leaves each reheater at 600 C. Condesation occurs at 40 C.
Find QA,wNet,Cycle efficiency,Ec and engine efficiency
Show given, complete solution, and diagram.
A steam power plant operates on the Rankine Cycle. The steam enters the turbine at 7 Mpa and 550 with a velocity of 30 m/s. It discharges to the condenser at 20kpa with a velocity at 90 m/s. Calculate the net workin kw for a flow of 37.8kg/s.
a. 23.23 Mw c. 34.22 Mw
b. 53.34 Mw d. 46.54 Mw
Н.W
A smaller power plant produces steam at 3 MPa, 600•C, in the boiler. It
keeps the condenser at 45 C by the transfer of 10MW out as heat transfer.
The first turbine section expands to 500 kPa, and then flow is reheated
followed by the expansion in the low-pressure turbine. Find the reheat
temperature so that the turbine output is saturated vapor. For this reheat, find
the total turbine power output and the boiler heat transfer.
[Answer. (Reheat temperature= 529°C , total turbine power output= 6487
kW, the boiler heat transfer= 16 475 kW)]
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- 10 0.9967. Ans. H.W 2 A smaller power plant produces steam at 3 MPa, 600 C, in the boiler. It keeps the condenser at 45 C by the transfer of 10MW out as heat transfer. The first turbine section expands to 500 kPa, and then flow is reheated followed by the expansion in the low-pressure turbine. Find the reheat temperature so that the turbine output is saturated vapor. For this reheat, find the total turbine power output and the boiler heat transfer. Answer. (Reheat temperature= 529°C , total turbine power output= 6487 kW, the boiler heat transfer= 16 475 kW)arrow_forward3) The pump works (wbomba) and the turbine (wurbina). 4) The heats: boiler (QH) and condenser (QL). 5) The thermal efficiency of this cycle.arrow_forwardAn electric power plant operating on the Carnot cycle puts heat into a river with a water temperature of (15 °C), what must be the maximum temperature that the working material puts forward in the plant to be efficient (40%), and if it is required to produce a capacity (20MW), what is the quantity rejected and Additive heat per unit time.arrow_forward
- Solve with me time 50 minutes ..Calculate the ideal cycle efficiency and specific steam consumption (S.S.C.) of a regenerative eycle with triple extractions, as shown in Figure 1, with boiler outlet steam pressure and superheat steam temperature are 8 MPa and 500 °C, respectively, and condenser pressure 9.6 kPa. If the steam flowing through the turbine is 100 kg/s, also find the power output. Determine the heat rate of the turbine, which is defined as "the heat required at the turbine inlet per unit of power generated." (Assume the turbine extraction bleed steam pressures such that temperature difference between T, and T, is approximately equally divided. Neglect work input to boiler feed pump. Also assume that on completion of regenerative feed heating, the enthalpies of both the compressed feedwater and condensed steam are equal to the enthalpies of the saturated liquid corresponding to the respective extraction bleed steam pressuresarrow_forwardIndicate TS- Diagram and Use SI unit Steam Table In a steam power plant that uses reheat cycle steam at 15.5 MPa, 545 °C enters the engine and expands to 1.95 MPa. At this point the steam is withdrawn and passes through a reheater. It reenters the engine at 535 °C. Expansions now occur to the condenser pressure of 0.0035 MPa. Find the efficiency in %.arrow_forwardA certain power plant produces a net power output of 120 MW. The constant pressure condenser operates at 8 kPa and the constant pressure boiler operates at 1 MPa. The steam enters the turbine, which operates at 88% efficiency at 600°C, and the water leaving the condenser at 8kPa enters the 72% efficient pump. Find: a) mass flow rate in kg/hr of the working fluid, b) heat suplied to the boiler in kJ/hr, c) heat rejected to the condenser in kJ/hr; I want a personalized answer so please do not copy from other's work. I need it ASAParrow_forward
- Thermodynamicsarrow_forwardAirborne heat used to heat a homerefrigerant circulating in the cycle of the pump-134a600 kPa pressure and 40 oC enter the condenser, at the same pressureIt comes out as a saturated liquid. Circulating refrigerantthe mass flow of the fluid is 0.03 kg / s and the compressor hasif the power is 1.8 kWa) COP value of the heat pumpb) Airborne per unit time ?̇ ?Find the amount of heat.arrow_forwardFind C.O.P from the simple vapor refrigeration cycle R-717. evaporation temperature is -5 ° C and condenser temperature is 40 ° C. COP =arrow_forward
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