Determine the specific enthalpy values at the four key points of the cycle. Calculate the specific heat provided to the boiler, the specific work extracted from the power station and the mass flow rate of the steam circulating in the cycle Determine the thermal efficiency of the cycle.
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- A closed-cycle gas turbine plant consists of a compressor, a heat exchanger, a heater, a two-stage turbine with reheater, and a cooler. The maximum and minimum pressures and temperature in the cycle are 30 bar and 570oC, and 7.5 bar and 15oC. The pressure in the reheater is 15 bar. Sketch the layout of the plant and indicate pressures and temperaturesbetween the components if (a) the heat exchanger is used, (b) the heat exchanger by-passed.Calculate the ideal cycle efficiencies and work ratios in both cases. The gas used in the circuit is helium, which has a molar mass of 4 kg/kmol and cp=1.5 RPART D only A gas-turbine power generator operates on an ideal air-standard Brayton cycle 1 → 2 → 3 → 4 shown in Fig. 1. The gas temperatures at the compressor inlet, compressor exit, and turbine inlet are T1 = 300 K, T2 = 600 K, and T3 = 1200 K, respectively. Solve PART D below using the variable specific heat assumption PART D - Evaluate the thermal efficiency η of the cycle and the back work ratio rBW = wC/wT.For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 whereWFS_A = mass fraction of NH3 in solution form the absorberWFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flowFor large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psiConsider a large NH3/H2O plant operating per the schematic below: Known/given:i. Refrigeration load = 500 tonsii. Evaporator temperature (state point 10) = 41.1 Fiii. Evaporator pressure (state point 10) = 75 psiaiv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber)v. Strong aqua solution temperature (state point 3) = 105 Fvi. Condenser temperature (state point 8) = 100 Fvii. Condenser and tower pressure (state point 7) = 211.9 psiaviii. Concentration split, WFS_G - WFS_A =6% by weight…
- Steam enters the turbine of a simple vapor power plant with a pressure of 12 MPa and a temperature of 600°C and expands adiabatically to condenser pressure, p. Saturated liquid exits the condenser at pressure p. The isentropic efficiency of both the turbine and the pump is 84%. a. For p = 30 kPa, determine the turbine exit quality and the cycle thermal efficiency. b. Plot the quantities of part (a) versus p ranging from 6 kPa to 100 kPa.A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 1250 and 2 psia. The mass flow rate of steam through the cycle is 75 lbm/s. The moisture content of the steam at the turbine exit is not to exceed 10 percent. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the minimum turbine inlet temperature, (b) the rate of heat input in the boiler, and (c) the thermal efficiency of the Cycle. Answers:Please help!!!! Refrigerant 22 enters the compressor of an ideal vapor-compression refrigeration system as saturated vapor at -30°C with a volumetric flow rate of 10 m3/min. The refrigerant leaves the condenser at 19°C, 9 bar. Determine: (a) the magnitude of the compressor power, in kW. (b) the refrigerating capacity, in tons. (c) the coefficient of performance. (d) the rate of entropy production for the cycle, in kW/K. Answer for part (a): 52 kW Answer for part (b): 59 tons Answer for part (c): 3.98 Please answer part also d! That's the part I also need. Thank you!
- A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 1250 and 2 psia. The mass flow rate of steam through the cycle is 75 lbm/s. The moisture content of the steam at the turbine exit is not to exceed 10 percent. Show the cycle on a T-s diagram with respect to saturation lines, and determine (a) the minimum turbine inlet temperature, (b) the rate of heat input in the boiler, and (c) the thermal efficiency of the cycle.For the NH3/H2O cycle the following relationship give the solution flow rate per unit refrigeration rate: WFS_A * X - WFS_G(X-1) = 1 where WFS_A = mass fraction of NH3 in solution form the absorber WFS_G = mass fraction of NH3 in solution from the generator X-1 =mass of solution from the generator per unit mass of refrigerant flow For large systems, a reasonable pressure drop between the evaporator and absorber is 1.5 psi Consider a large NH3/H2O plant operating per the schematic below: Known/given: i. Refrigeration load = 500 tons ii. Evaporator temperature (state point 10) = 41.1 F iii. Evaporator pressure (state point 10) = 75 psia iv. Absorber pressure (state point 11) = 73.5 psia (per rule of thumb above regarding pressure drop between the evaporator and absorber) v. Strong aqua solution temperature (state point 3) = 105 F vi. Condenser temperature (state point 8) = 100 F vii. Condenser and tower pressure (state point 7) = 211.9 psia viii. Concentration split, WFS_G - WFS_A =6%…Steam enters the turbine of a simple vapor power plant with a pressure of 10 MPa and temperature T, and expands adiabatically to 6 kPa. The isentropic turbine efficiency is 85%. The saturated liquid exits the condenser at 6 kPa and the isentropic pump efficiency is 82%. (a) For T = 580°C, determine the turbine exit quality and the cycle thermal efficiency. (b) Plot the quantities of part (a) versus T ranging from 580 to 700°C.Note: Please produce a concise, workable solution that includes all of the necessary details and explanations. Thank you so much; if the wish is fulfilled, I'll hit "like" right away.
- A steam power plant operates according to the reheat Rankine cycle between the pressure limits of 15 MPa and 10 kPa. The mass flow rate of the steam circulating in the cycle is 12 kg/s. The steam enters both stages of the turbine at a temperature of 500 °C. The dryness fraction of the steam at the exit of the low-pressure turbine is 90%. Show the cycle on a T-s diagram, including the saturated liquid and saturated vapor lines. Also, determine: a) The pressure at which reheat occurs, b) The amount of heat supplied to the steam per unit time in the boiler, c) The thermal efficiency of the cycle. Note: This is a question from the thermodynamics course. Please provide a clear and quick solution.An Otto cycle with a compression ratio of 8 begins its compression at 94 kPa, and 10°C. The maximum temperature and minimum volume within the cycle is 900°C and 150 cm3 , respectively. Utilizing air-standard assumptions, determine the (a) mean effective pressure, in kPa. Consider the cycle as a model of the processes in each cylinder of a spark-ignition engine. Determine the (b) net power output, in kW, if the engine has four cylinders and the cycle is repeated 1200 times per minute in each cylinder. Show the T-s and P-? diagrams when solving. Note that the specific heats are NOT constant Use g = 9.81 m/s2 or 32.2 ft/s2 , T(K)=T(°C)+273 and T(R)=T(°F)+460, where applicableSuperheated steam (s. fig. C) at a pressure of 300 bar and a temperature of 550 ℃ enters a turbine made up of two stages. Steam exits the first stage of the turbine at 35 bar and gets reheated at a constant pressure at 550 ℃. Each stage of the turbine has an isentropic efficiency of 80%. The isentropic efficiency of the pump is 85%. The pressure of the condenser is 10 kPa. (a) Sketch the cycle in a T-s diagram and calculate the enthalpy at each point of the cycle. (b) Calculate the flow rate of the working fluid if the power output of the turbine is 100 MW. (c) Calculate the thermal efficiency of the cycle. (d) Double check the result for the heat rejected in the condenser.