scholarly journals Measurement and control techniques in geothermal power plants

1979 ◽  
Author(s):  
J.F. Whitbeck ◽  
R.H. Dart ◽  
J.D. Miller ◽  
D.R. Brewer
Keyword(s):  
Power Plants ◽  
Control Techniques ◽  
Geothermal Power ◽  
And Control ◽  
Measurement And Control

Introducing Temperature Measurement and Control Techniques to Engineering Undergraduate Students in the Gulf Region

2008 ◽  
Author(s):  
Peter Rodgers ◽  
Arman Molki
Keyword(s):  
Engineering Education ◽  
Temperature Measurement ◽  
Temperature Control ◽  
Instrumentation Amplifier ◽  
Gulf Region ◽  
Linear Temperature ◽  
Control Techniques ◽  
The Third ◽  
And Control ◽  
Measurement And Control

Hands-on laboratory skills play a vital role in providing students with a sound understanding of the scientific fundamentals and their application in solving real-life engineering problems. One of the essential laboratory based courses taught at our Institute is Introduction to Measurements and Instrumentation. The design and implementation of such a course has been well documented in Western engineering education, but presents specific challenges in the Gulf region due to economical, social and cultural factors. This paper discusses the adaptation of corresponding Western courses to undergraduate mechanical engineering studies in the Gulf region. Laboratory exercises for temperature measurement and control are described, which consist of four modules, each building upon the other. In each module, students learn how to design an accurate measuring system, and process and interpret collected data. In the first module, the students are required to build a thermocouple reader using an AD620 instrumentation amplifier and to compare measurements with NIST reference tables. The second module is an introduction to LabVIEW, a graphical data acquisition programming language. The students are required to write a LabVIEW program to record multiple thermocouple signals from a heated plate under varying convective cooling conditions, using a high resolution temperature logger with on-board signal conditioning. The third and fourth modules focus on temperature control techniques. In the third laboratory exercise, the students are required to construct an electrical circuit using a low-power PCB relay and NPN bipolar transistor to develop a bang-bang linear temperature controller. The program created in module two is modified to have the heater operation automatically controlled for a fixed temperature set point. In module four, the students replace the bang-bang controller built in the previous lab with a commercially available PID controller and explore the differences between PID and linear temperature control systems. For each module, students are required to submit a formal report covering the theoretical background, the experimental procedure employed, uncertainty analysis, and conclusions and recommendations. An effective teaching strategy is outlined that covers the fundamental concepts of temperature measurement and control through carefully designed experiments, with sample results presented. Emphasis is placed on the tailoring of the course topics to engineering education in the Gulf region.

Research and Design of the Control System for Natural Gas Heater

2013 ◽  
Vol 842 ◽  
pp. 541-545
Author(s):  
Yun Guo ◽  
Zhi Qiang Huang ◽  
Shun Xin Yang
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Power Plants ◽  
Production Efficiency ◽  
Combustion Efficiency ◽  
Gas Temperature ◽  
Technical Requirements ◽  
Real Time Measurement ◽  
And Control ◽  
Measurement And Control

Natural gas heaters are widely used in gas-fired power plants to meet the combustion needs and to improve the combustion efficiency. For the control features and technical requirements of the natural gas heater, the computer automatic control system for natural gas heater has been designed,and realizes the temperature and liquid level real time measurement and control. The system increases significantly the control accuracy of natural gas temperature, eliminates potential unsafety and improves production efficiency.

scholarly journals Recent Development of Measurement and Control Techniques

1965 ◽  
Vol 51 (1) ◽  
pp. 86-98
Author(s):  
Kanichiro KATSURA ◽  
Takashi ISOBE
Keyword(s):  
Control Techniques ◽  
And Control ◽  
Measurement And Control

Thermodynamic modelling and simulation of geothermal power plants: case studies and environmental impact

2021 ◽  
Author(s):  
Vitantonio Colucci ◽  
Angelo Damone ◽  
Giampaolo Manfrida ◽  
Daniele Fiaschi
Keyword(s):  
Power Plants ◽  
Liquid Mixtures ◽  
Pollutant Emissions ◽  
Geothermal Fluids ◽  
Framework Model ◽  
On Line ◽  
Geothermal Power ◽  
And Control ◽  
Excellent Tool ◽  
Complicated Task

<p>The emissions associated with Geothermal power plant (GTPP) due to geothermal fluids represents a compelling challenge addressed in the last decades. The on-line measuring of pollutants generated by GTPP might result in a complicated task to handle. Simulation of GTPP has become an excellent tool to monitor and control the emission of pollutants. In the present work, the pollutant emissions of GTPP of Hellisheidi (Island), Chiusdino, and Castelnuovo (Italy) are modelled and developed with Unisim Design R480 using well understood thermodynamical models implemented in OLI. The presence of brine in the thermodynamical models has been taken into account. Carbon dioxide, methane, and hydrogen sulfide are the chemical pollutants considered for the process simulation. The AQ framework model in OLI is being used for binary mixtures and non-condensable gas. Furthermore, for liquid mixtures containing more than two components, the MSE-SRK Thermodynamic model is desirable depending on the original geothermal fluid source. The simulation process outcome agrees with experimental data for pressure between 30 and 100 bar within 5% deviation. A systematic study of the spatial distribution of the emissions has been made for the area surrounding the GTPP. Furthermore, an economic evaluation overview has been performed to highlight the equipment needed for maintenance and tool substitution.</p>

Control of segment length or force in isolated papillary muscle: an adaptive approach

1989 ◽  
Vol 256 (6) ◽  
pp. H1726-H1734 ◽  
Author(s):  
J. N. Peterson ◽  
W. C. Hunter ◽  
M. R. Berman
Keyword(s):  
Muscle Length ◽  
Adaptive Method ◽  
Current Control ◽  
Segment Length ◽  
Control Techniques ◽  
Feedback Strategies ◽  
And Control ◽  
Measurement And Control ◽  
Total Muscle ◽  
Command Signal

Mechanical studies of isolated cardiac muscle are complicated as a result of damage inflicted on the ends of the muscle during excision and mounting procedures. Inhomogeneities between the healthy central and weakened end portions of the muscle make it difficult to interpret studies where only total muscle length is controlled. Measurement and control of central segment length is clearly desirable but fraught with technical difficulties. We present a novel application of adaptive control methods that minimizes the difficulties encountered with current control techniques. This method, which allows control of either segment length or force, takes advantage of the repetitive, periodic nature of contractions. Here deviations of measured segment length or force signals from a desired response during one twitch are used to modify the muscle length command signal for use on the next twitch. This process continues for successive twitches until either segment length or force is within desired limits. The adaptive method allows greater stability and immunity to noise than classical feedback strategies.

Formation, transformation, measurement, and control of SO3 in coal-fired power plants

Fuel ◽  
2019 ◽  
Vol 241 ◽  
pp. 327-346 ◽  
Author(s):  
Chenghang Zheng ◽  
Yifan Wang ◽  
Yong Liu ◽  
Zhengda Yang ◽  
Ruiyang Qu ◽  
...  
Keyword(s):  
Power Plants ◽  
And Control ◽  
Measurement And Control
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