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Related Concept Videos

Control Systems01:10

Control Systems

1.7K
Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
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Control Systems: Applications01:25

Control Systems: Applications

1.0K
Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
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Conservation of Energy in Control Volume01:14

Conservation of Energy in Control Volume

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Consider a turbine operating under steady-flow conditions. The control volume is drawn around the turbine, with fluid entering at one point and exiting at another. The turbine extracts energy from the fluid, which performs mechanical work (shaft work).
For steady flow systems, the time derivative of the stored energy becomes zero since there is no energy accumulation within the control volume. This simplifies the energy equation to:
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Open and closed-loop control systems01:17

Open and closed-loop control systems

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Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
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Mechanical Efficiency of Real Machines01:14

Mechanical Efficiency of Real Machines

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The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
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Turbine-Governor Control01:17

Turbine-Governor Control

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Turbine-governor control is crucial for maintaining power system stability by balancing turbine mechanical power output with electrical load demand. This mechanism ensures that generator frequency and rotor speed are within acceptable limits during load variations. Turbine-generator units store kinetic energy due to their rotating masses; this energy is released to meet the load requirement when the load increases. The electrical torque of turbines rises to meet the demand, whereas the...
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Process Control and Energy Efficiency.

Jodie M Simkoff1, Fernando Lejarza1, Morgan T Kelley1

  • 1McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA; email: jsimkoff@utexas.edu, lejarza@utexas.edu, mtkelley@utexas.edu, calvint@utexas.edu, mbaldea@che.utexas.edu.

Annual Review of Chemical and Biomolecular Engineering
|March 25, 2020
PubMed
Summary
This summary is machine-generated.

Effective control systems are crucial for enhancing chemical process energy efficiency. Good control reduces variability, enables advanced operations, and supports efficient plant designs.

Keywords:
energy efficiencyprocess controlsmart manufacturingsustainability

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Area of Science:

  • Chemical Engineering
  • Process Control
  • Energy Efficiency

Background:

  • Chemical processes often operate suboptimaly due to variability.
  • Energy efficiency is a critical concern in the chemical industry.

Purpose of the Study:

  • To review the impact of control systems and strategies on chemical process energy efficiency.
  • To highlight the role of control in achieving optimal operation and energy savings.

Main Methods:

  • Literature review of control systems and strategies in chemical processes.
  • Analysis of direct and indirect effects of process control on energy efficiency.

Main Results:

  • Good control performance is necessary but not sufficient for energy efficiency.
  • Reduced output variability allows operation closer to economic optima.
  • Control enables transient strategies like conversion smoothing and demand response.
  • Control systems facilitate energy-efficient plant designs through process integration and intensification.

Conclusions:

  • Process control is fundamental to improving energy efficiency in chemical manufacturing.
  • Advanced control strategies unlock significant energy-saving potentials.
  • Control systems are integral to modern, energy-efficient chemical plant design and operation.