Question

In: Mechanical Engineering

3. In a Rankine cycle, the water enters the turbine at a pressure of L =...

3. In a Rankine cycle, the water enters the turbine at a pressure of L = 15 MPa and M = 525 ° C. Condenser pressure is N = 10 kPa. At the condenser outlet, it is assumed that the water is saturated liquid and the pump inlet pressure is again N = 10 kPa. Since the isentropic efficiency of the pump is Y 80%, the isentropic efficiency of the turbine is Z = 60%,
a-) Calculate the heat given to the loop in the boiler. (10 s)
b-) Calculate the net work of the loop. (10 s)
c-) Find the thermal efficiency of the loop. (10 s)

Solutions

Expert Solution

samet mamat answered 10 months ago
Next > < Previous

Related Solutions

Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at...
Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 16 MPa, and the condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s. Determine: (a) the net power developed, in kW. (b) the rate of heat transfer to the steam passing through the boiler, in kW. (c) the percent thermal efficiency. (d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water...
A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine...
A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine at 8 MPa and 450◦C and exits at 0.8 MPa. It is then reheated at 400◦C before entering the second turbine, where it exits at 10 kPa. If the amount of work into the pump is 8.04 kJ/kg and the net work per cycle produced is 1410.5 kJ/kg, determine the thermal efficiency. Assume no pressure losses in the condenser or the boiler.
An ideal Rankine cycle operates with a turbine inlet pressure of 600 psia and a turbine...
An ideal Rankine cycle operates with a turbine inlet pressure of 600 psia and a turbine inlet temperature of 526 oF. The steam is isentropically expanded through the turbine to 15 psia as illustrated on the T-s diagram shown below. Using the Mollier diagram, determine the enthalpy at the turbine inlet, in BTU/lbm, under these operating conditions. State your answer in whole numbers.
An ideal Rankine cycle operates with a turbine inlet pressure of 900 psia and a turbine...
An ideal Rankine cycle operates with a turbine inlet pressure of 900 psia and a turbine inlet temperature of 572 oF. The steam is isentropically expanded through the turbine to 5 psia as illustrated on the T-s diagram shown below. Using the Mollier diagram, determine the percent moisture at the turbine outlet under these operating conditions. State your answer in whole numbers.
8. In a Rankine cycle steam enters the turbine at 900 psia and 1000oF and exhausts...
8. In a Rankine cycle steam enters the turbine at 900 psia and 1000oF and exhausts at 1 psia. What is the thermal efficiency? Neglect pump work. State your answer as a percent to one decimal place. Example: 25.2 9. Steam is expanded to 12% moisture at 1 psia in a Rankine cycle. If the initial pressure is 400 psia, what is the efficiency? Neglect pump work. Express your answer as a percent to one decimal place. Example: 32.5 I...
A steam power plant operates on a practical Rankine Cycle. The steam enters the turbine at...
A steam power plant operates on a practical Rankine Cycle. The steam enters the turbine at 3 MPa and “648” K and is condensed in the condenser at a pressure of 46 kPa. You are assigned on a project to improve the thermal efficiency of this plant. a) Draw the schematic of the plant and determine the thermal efficiency of the practical cycle assuming that the efficiencies of pump and turbine are 0.75 and 0.7, respectively. ( b) Draw a...
In a power plant based on a simple Rankine cycle, steam enters the turbine at 15...
In a power plant based on a simple Rankine cycle, steam enters the turbine at 15 MPa and 900°C. The condenser pressure is 5 kPa. The turbine operates adiabatically and has an isentropic efficiency of 85%, and the pump also operates adiabatically and has an isentropic efficiency of 80%. Determine the work required to pump the water to the boiler in kJ/kg of water flowing, and the enthalpy of the water leaving the pump.
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and 480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 °C a) Calculate the total heat addition, net work of the cycle, heat extraction through condenser, and thermal efficiency of this ideal Rankine cycle with reheat. [25] b) Calculate the same quantities assuming that the pump and each turbine...
Consider steam in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa.
 Consider steam in an ideal Rankine cycle. The saturated vapor enters the turbine at 8.0 MPa. Saturated liquid exits the condenser at P = 0.008 MPa. The net power output of the cycle is 100 MW. determine the thermal efficiency of the cycle
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa...
In an ideal Rankine cycle with reheat, superheated steam vapor enters the turbine at 10 MPa and 480 °C, while the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 °C a) For a pressure of 7 bar right after the first stage turbine in the ideal Rankine cycle, create two plots: thermal efficiency as a function of the reheat temperature from 200 °C to 500 °C; and the...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT