A well insulated turbine operating at steady state is shown below. Steam enters at 3 MPa, 400 C, with a volumetric flow rate of 85 m3/min. Some steam is extracted from the turbine at a pressure of 0.5 MPa and a temperature of 180 C. The rest expands to a pressure of 6 kPa and a quality of 90%. The total power developed by the turbine is 11,400 kW. Kinetic and potential energy effects may be neglected. Determine the mass flow rate of the steam extracted from the turbine at location 2 in kg/s. 3.9 kg/s O 2.5 kg/s 3.1 kg/s O2.8 kg/s 4.6 kg/s
A well insulated turbine operating at steady state is shown below. Steam enters at 3 MPa, 400 C, with a volumetric flow rate of 85 m3/min. Some steam is extracted from the turbine at a pressure of 0.5 MPa and a temperature of 180 C. The rest expands to a pressure of 6 kPa and a quality of 90%. The total power developed by the turbine is 11,400 kW. Kinetic and potential energy effects may be neglected. Determine the mass flow rate of the steam extracted from the turbine at location 2 in kg/s. 3.9 kg/s O 2.5 kg/s 3.1 kg/s O2.8 kg/s 4.6 kg/s
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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
Transcribed Image Text:### Turbine Operation Analysis
#### System Specifications
- **Turbine Inlet:**
- Pressure (\(p_1\)): 1600 lbf/in.\(^2\)
- Temperature (\(T_1\)): 1000°F
- Velocity (\(V_1\)): 2 ft/s
- **Turbine Exit:**
- Mass flow rate (\(\dot{m}_2\)): 0.22 \(\dot{m}_1\)
- Pressure (\(p_2\)): 160 lbf/in.\(^2\)
- Temperature (\(T_2\)): 450°F
- Velocity (\(V_2\)): 10 ft/s
- **Second Exit Stream:**
- Pressure (\(p_3\)): 1 lbf/in.\(^2\)
- Quality (\(x_3\)): 0.85
- Velocity (\(V_3\)): 150 ft/s
#### Problem Description
A well-insulated turbine operates in a steady state. Steam enters at a pressure of 3 MPa and a temperature of 400°C, with a volumetric flow rate of 85 m\(^3\)/min. Some of the steam is extracted from the turbine at a pressure of 0.5 MPa and a temperature of 180°C. The remaining steam expands to a pressure of 6 kPa with a quality of 90%. The turbine generates a total power of 11,400 kW.
**Objective:**
- Determine the mass flow rate (\(\dot{m}_2\)) of the steam extracted at the turbine's second exit (location 2) in kg/s.
#### Options
- 3.9 kg/s
- 2.5 kg/s
- 3.1 kg/s
- 2.8 kg/s
- 4.6 kg/s
#### Diagram Analysis
The diagram shows a turbine with two exits. It illustrates the flow of steam in and out of the turbine, highlighting the pressures, temperatures, velocities, and relative mass flow rates at various points. The process includes energy transfer terms and quality specifications, essential for analyzing thermodynamic performance.
### Key Concepts
- **Conservation of Mass and Energy:** Essential principles for analyzing turbines in a steady state.
- **Quality of Steam:** Indicates the proportion of vapor in the mixture
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