Q2] (20 Marks)A steam turbine with one open feed water heater (OFWH) as shown in the following figure.In terms of enthalpies and y determine:1- Work of HPT 2- Work of LPT 3- Work at Pump1 4- Work at Pump2 5-The heat addedat the boiler 6- The quantity (y) in terms of enthalpies 7-Heat extracted from condenser5Boiler2岁3OFWH9Pump2HPTLPT8 Pump1OCondenser

The work done by the High Pressure Turbine (HPT) is the difference in enthalpy between the inlet and…

Answered: Q2] (20 Marks) A steam turbine with one…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Referring to the reversible heat pump cycle shown in the figure, p1 = 14.7 Ibf/in?, p4 = 27.8 lbf/in?, v1 = 12.6 ft³/Ib, v4 = 8.0 ft³/lb, and the gas is air obeying the ideal gas model. P4 pi TH V4 VI Determine TH, in °R, and the coefficient of performance. Step 1 Determine TH, in °R. TH = °R Save for Later Attempts: 0 of 1 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above.
In a refrigeration cycle, the refrigerant gains heat in the evaporator and in thesuction line. In a certain refrigeration system, R-134a gains 67.8 Britishthermal units per pound (Btu/lb) in the evaporator. It then gains 2.5 Btu/lb inthe suction line. Find in Btu/lb the total heat gained by the R-134a.
3. A simple steam power plant illustrated below uses 20 kg/s of steam. Find: a) the boiler heat transfer rate; b) the turbine power output; c) the condenser duty; d) the pump power required. What is the ratio of net power out to heat in (the thermal efficiency)? The turbine and the pump are adiabatic 2 Boiler Pump 2 3 |3|4 Stream T(°C) P(MPa) 40 40 Turbine 600 x = 1 Condenser 0.01 10 10 0.01 A
Superheated steam at 18 MPa, 560 °C enters the steam turbine. The pressure at the exit of the turbine is 0.06 MPa and saturated liquid water leaves the condenser at 0.06 MPa. Pressure is increased to 18 MPa again after the pump. Find: (a) Sketch the process on a T-s diagram. (b) The net work per unit of steam flow in kJ/kg. (c) Heat transfer to steam passing through the boiler, in kJ/kg.
20 g of air undergoes a closed cycle, illustrated in Figure Q2, which consists of the following 3 processes: 1-2 Constant pressure heat rejection. 2-3 Constant volume heat addition. 3-1 Isothermal expansion back to the original conditions. P (kPa) 75 1 V (m') 0.025 0.04 Figure Q2: Three process cycle Given that Rair = 287 J/kg-K, and Cy = 718 J/kg-K, and assuming ideal gas conditions throughout: (a) Determine the temperatures at points 1, 2 and 3, and the pressure at point 3. (b) Determine the work during each process, and the net work from the cycle. (c) Determine the heat transferred during each process. (d) Verify that this is a cycle.
The working gas of a thermodynamic cycle is air. The gas originally starts at 100kPa, 1m³ and 27°C First, the pressure of the gas is doubled keeping the volume fixed. Second, the volume of the gas is doubled at constant pressure. Third, the gas undergoes an adiabatic expansion. Fourth, the gas undergoes an isothermal contraction back to its original state a) Make a table of the pressure, volume, and temperature at the start of each process. b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy and change in entropy during each leg of the cycle. ● ● c) Draw P-v and T-s diagrams, indicating P, V & T at the start of each process & AU, Q, W, AH & AS for each leg. d) Calculate the thermal efficiency of the cycle.
Referring to the reversible heat pump cycle shown in the figure, p₁ = 14.7 lb/in², p4 = 20.3 lb/in², v₁ = 12.6 ft³/lb, v4 = 10.0 ft³/lb, and the gas is air obeying the ideal gas model. P4 P1 Determine TH, in °R, and the coefficient of performance. V4 VI TH V
SU-1 A heat engine with &=0.400 operates between two heat reservoirs at 250K and 450K. The energy amounts and heat flow diagram for one cycle of operation of the engine is shown to the right. a) What is the change in entropy for the engine for one cycle of operation of the engine? b) Find the change in entropy for the engine surroundings for one cycle of operation of the engine. c) Find the change in entropy for the universe for one cycle of operation of the engine. d) Is this engine real, reversible, or impossible? Explain why using your results from the previous parts. Th-450K 500 200J Engne 300J T-250K
1- A fluid at 0.7 bar occupying 0.09 m' is compressed reversibly to a pressure of 3.5 bar according to a law pv" = constant. The fluid is heated reversibly at constant volume until the pressure is 4 bar; the specific volume is then 0.5 m/kg. A reversible expansion according to a law pv = constant restores the fluid to its initial state. Sketch the cycle on a p- v diagram and calculate: a- the mass of fluid present; b- the value of n in the fist process; c- the net work done of the cycle.
Please help me out. Thermodynamics. Thank you.
B-D please or as much as you can do
a (a) Air in (b) (c) Diffuser Compressor Combustors 2 State State 1 80 State 2 3300 State 3 3200 State 4 400 State 5 80 wwww Pressure (kPa) 3 Turbine 4 Figure 1: Figure for Problem 2. In a modern jet engine, air passes through the following states from the inlet to the outlet, as shown in Figure 1: Product gases out 260 780 1500 900 640 K 5 > Nozzle justify them) to find the compressor specific work. Temperature (K) For this problem, you may neglect any heat transfer, as well as neglect kinetic energy except at the outlet (state 5). Use the tables for obtaining properties (do not assume constant specific heat). Assume air is an ideal gas with ideal gas constant of R = 0.287 kJ/kg-K. Use the appropriate conservation equations and make approximations (and In a similar manner, find the turbine specific work. And finally, using similar arguments, find the nozzle exit velocity.

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