Assignment #3 Thermal Electricity

Steam is the working fluid in the ideal reheat cycle shown in the following figure together with operational data. If the mass flow rate is 1.3 kg/s, determine the power developed by the cycle, in kW, and the cycle thermal efficiency. 6 p = 140 bar p = 15 bar p = 1 bar State 1 2 3 4 5 6 p (bar) 140 15 15 1 1 140 T (°C) 520.0 201.2 428.9 99.63 99.63 h (kJ/kg) 3377.8 2800.0 3318.5 2675.5 417.46 431.96

A steam-powered power plant works on the basic Rankine cycle.shown in the figure. Likewise, some of its thermodynamic states are summarized in the attached table.Knowing that the work per unit mass delivered to the pump is ›W = 2480 (J/kg], determinein SI units the following: a) The specific volume of water in state 4.b) The associated work per unit mass, developed in the Curbina.c) The associated heat per unit mass released by the water in the condenser.d) The efficiency of the cycle

A steam-powered power plant works on the basic Rankine cycle.shown in the figure. Likewise, some of its thermodynamic states are summarized in the attached table.Knowing that the work per unit mass delivered to the pump is 3W4 = 2480 (J/kg], determinein SI units the following: a) The specific volume of water in state 4.b) The associated work per unit mass, developed in the Curbina.c) The associated heat per unit mass released by the water in the condenser.d) The efficiency of the cycle

Steam enters the turbine of a power plant operating on the Rankine cycle (Fig. 2) at 873.15 Kand exhausts at 30 kPa. To show the effect of boiler pressure on the performance of the cycle,calculate the thermal efficiency of the cycle and the quality of the exhaust steam from theturbine for boiler pressures of 5000,7500, and 10 000 kPa. #Chemical Engineering #Chemical #Thermodynamics

1. A medium size power station is used to produce 30 MW net power for a refinery. The station uses steam as the operating fluid and operates according to the Carnot cycle between the pressure limits of 0.4 bar and 35 bar. Steam enters the boiler as a saturated liquid and leaves it as a dry saturated vapour. (i) List the name of the four processes in a generic Carnot cycle and state what type of energy transfer (work/heat) can be neglected in each process. (ii) Sketch a T-s diagram for the above cycle indicating the location of the four components required. (iii) Determine the dryness fraction of the steam that is fed to the condenser.

Thermodynamics fill in the blank: 1) Among the principal irreversiblilities of a gas turbine power plant, the most significant source of irreversibility by far is ______________. 2) Cooling a gas as it is compressed would reduce the work input required during compression, but achieving a heat transfer rate high enough to effect a significant reduction in work is difficult to achieve in practice. A practical alternative is to introduce multiple stages of compression with heat exchangers called _______________ between the stages.

2. A medium size power station is used to produce 30 MW net power for a refinery. The station uses steam as the operating fluid and operates according to the Carnot cycle between the pressure limits of 0.4 bar and 35 bar. Steam enters the boiler as a saturated liquid and leaves it as a dry saturated vapour. (i) List the name of the four processes in a generic Carnot cycle and state what type of energy transfer (work/heat) can be neglected in each process. (ii) Sketch a T-s diagram for the above cycle indicating the location of the four components required. (ii) Determine the dryness fraction of the steam that is fed to the condenser. (iv) Determine the specific enthalpy values at the four key points of the cycle. (v) 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 (vi) Determine the thermal efficiency of the cycle. (vii) Using the highest and lowest temperature values in…

A medium size power station is used to produce 30 MW net power for a refinery. The station uses steam as the operating fluid and operates according to the Carnot cycle between the pressure limits of 0.4 bar and 35 bar. Steam enters the boiler as a saturated liquid and leaves it as a dry saturated vapour.(i) List the name of the four processes in a generic Carnot cycle and state what type of energy transfer (work/heat) can be neglected in each process. ii) Sketch a T-s diagram for the above cycle indicating the location of the four components required. (iii) Determine the dryness fraction of the steam that is fed to the condenser. (iv) Determine the specific enthalpy values at the four key points of the cycle. (v) 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 (vi) Determine the thermal efficiency of the cycle. (vii) Using the highest and lowest temperature values in the…

A medium size power station is used to produce 30 MW net power for a refinery. The station uses steam as the operating fluid and operates according to the Carnot cycle between the pressure limits of 0.4 bar and 35 bar. Steam enters the boiler as a saturated liquid and leaves it as a dry saturated vapour. 2. (i) List the name of the four processes in a generic Carnot cycle and state what type of energy transfer (work/heat) can be neglected in each process. (ii) Sketch a T-s diagram for the above cycle indicating the location of the four components required. (iii) Determine the dryness fraction of the steam that is fed to the condenser. (iv) Determine the specific enthalpy values at the four key points of the cycle. (v) 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 (vi) Determine the thermal efficiency of the cycle. (vii) Using the highest and lowest temperature values in…

Rankine cycle/ engine (Thermodynamics) Show complete and step by step solution and the diagram. Answer as soon as possible.

Two reversible cycles operate between hot and cold reservoirs at temperatures TH and TC, respectively. (a)If one is a power cycle and the other is a refrigeration cycle, what is the relation between the coefficient of performance of the refrigeration cycle and the thermal efficiency of the power cycle? (b)If one is a refrigeration cycle and the other is a heat pump cycle, what is the relation between their coefficients of performance?

Projects 2: Rankine and Carnot cycle in practice Your colleague at the power plant station initiated a mutual discussion, where he suggested applying the Carnot cycle since it is considered the optimal cycle that steam power plant may be operated on. You were in a position to justify him why there many difficulties and impracticalities associated with the Carnot cycle in terms of the steam power plant, deliver a brief report explain why the Rankine cycle is preferred over the Carnot cycle in steam production plants, mention all impracticalities associated with applying Carnot cycle including the limitation of boiler and condenser temperature and pressure with respect to the surrounding saturation conditions (you may construct TS diagrams for both cycles to demonstrate your comparison).

The adjacent figure provides steady-state operating data for a vapor power plant using water as the working fluid. The mass flow rate of water is 12 kg/s. The turbine and pump operate adiabatically but not reversibly. Determine a) the thermal efficiency. b) the rates of heat transfer QQ and QQ000000, each in kW. State 1 2 3 4 5 6 P 6 MPa 10 kPa 10 kPa 7.5 MPa 7 MPa 6 MPa T(°C) 500 Sat. 40 550 h (kJ/kg) 3422.2 1633.3 191.83 199.4 167.57 3545.3

What is the maximum thermal efficiency possible for a power cycle operating between 600°C and 110°C? (A) 47% (B) 56% (C) 63% (D) 74%

2. The maximum thermal efficiency possible for a power cycle operating between 1200°F and 225°F is: 58.73%