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Setpoint Temperature Controller Articles & Analysis
20 articles found
Have you noticed a decline in the performance of your water-cooled equipment For many manufacturing plant operators and engineers, one of the primary challenges is how to minimize silica scale in process water. Many sustainability professionals find that to minimize silica build-up in process equipment is a struggle, often leading to significant operational challenges. Silica, a prevalent ...
Some common types include: On/Off Temperature Controllers: These controllers operate by turning the heating or cooling system on or off when the temperature deviates from the setpoint. Proportional Temperature Controllers: Proportional controllers adjust the ...
[i] To make sure influenza vaccinations are effective, they must be stored at the proper temperature. At the end of the cold chain, safe vaccine storage can only be assured through quality pharmaceutical refrigerators that ensure accurate setpoint temperatures and temperature uniformity throughout the chamber. ...
Upgrading to A Gas Mass Flow Controller Provides Greater Reliability for your Bioreactor When it comes to efficient bioreactor performance, precision mass flow control gas is critical. It is essential that bioreactor manufacturers have reliable, repeatable, and flexible gas supply systems for their bioreactors. Due to the ever-evolving demands and critical and complex nature in the ...
The referenced article is an accurate reflection of the state of our industry. Unfortunately, “problem aeration” is a common deficiency that exists in many plants. This deficiency directly impacts a utility’s ability to optimize the performance of secondary treatment and the largest use of power at the facility, aeration. To better understand this commentary, it’s prudent ...
A question we get a lot from our customers is how to determine which Sierra mass flow meter or mass flow controller is best for their application. Followed up by: What’s the difference between an economical mass flow controller and a premium mass flow controller. Our new video explains the differences between Sierra’s economical and premium mass flow meters and controllers (our ...
A Labview™ interface was used to monitor the response of the sensors and to control test conditions, including gas concentrations, gas mass flow rates, relative humidity and test sensor temperature. ...
Sierra provided a complete combustion control system that utilized MassTrak® mass flow controllers for measuring and regulating the delivery of very low mass flow rates (less than 50 slpm) over a wide range of pressure differentials. Oxygen-enriched air enhances the chemistry for the combustion of natural gas, increases flame temperature, and ...
If your product or equipment already has Modbus, then the NanoULTRA from Caption Data gives you the immediate ability to join them to the Internet of Things. From single units to 1000’s of units, with on line & real time control through the CDL SmartHub We have clients around the world using the NanoULTRA to manage products with Modbus and increase value, for example: A Leading ...
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Abstract: Ammonia-based aeration control (ABAC) is a cascade control concept for controlling total ammonia nitrogen (NHx-N) in the activated sludge process. Its main goals are to tailor the aeration intensity to the NHx-N loading and to maintain consistent nitrification, which meets effluent limits but minimizes energy consumption and improves nutrient removal. One limitation to ABAC is that the ...
The advent of high-power multiphase pumps is changing the world of oil production. In particular, they allow continued production from fields that are nearing the end of their useful lives. These revolutionary pumps have been in operation since autumn 1999 on the Dunbar platform, in the UK sector of the North Sea. Multiphase pumping (MPP) is essentially a means of adding energy to the ...
Melaka is a relatively small state on the southwest side of the Malay Peninsula with a city so rich in history and beauty that it is listed as a UNESCO World Heritage site. With a population around 850,000, the Melaka Water Company Ltd. (SAMB) manages roughly 270,000 service connections for commercial and residential customers. In 2008 the city embarked on an aggressive plan to upgrade their ...
Abha is a small modern city in the fertile mountains of southwestern SAUDI ARABIA. Its cool summers make it a popular destination for tourists, but in general the population hovers around 250,000. The city has a new reservoir on top of a hill that releases water through 6 km of piping down to its main Noaman reservoir. The top tank is 100 meters higher than the lower tank. This makes for a great ...
Abstract: A new control strategy has been developed that integrates dynamic SRT control with ammonia-based aeration control. In this strategy, feedback control of dynamic SRT is employed which is shown to provide the most appropriate means of adjusting the waste flow rate in response to loading and operational changes. A new SRT set point controller is developed which determines the optimum set ...
Complete mixing is hard to achieve in large bioreactors in wastewater treatment plants. This often leads to a non-uniform distribution of components such as dissolved oxygen and, hence, the process rates depend on them. Furthermore, when these components are used as input for a controller, the location of the sensor can potentially affect the control action. In this contribution, the effect of ...
This paper describes an improvement to the aeration control at the Ljubljana wastewater treatment plant. Several changes were made to the existing aeration control. An adjustment to the parameters of the common air pressure controller contributes to a more responsive operation of the compressors. The introduction of the air pressure set-point controller adjusts the air pressure in the common ...
The City of Modesto, California is situated 90 miles east of San Francisco and has approximately 200,000 residents relying on 200,000 of gallons of water a day. The City needed to upgrade three water storage tanks that hold approximately 750,000 gallons each. After years of using motor operated valves to fill water storage tanks, the city recognized that there were just too many problems. ...
Abstract: Aeration consumes about 60% of the total energy use of a wastewater treatment plant (WWTP) and therefore is a major contributor to its carbon footprint. Introducing advanced process control can help plants to reduce their carbon footprint and at the same time improve effluent quality through making available unused capacity for denitrification, if the ammonia concentration is below a ...
Abstract: To show the impact of sensor behaviour on the control result, four strategies for aeration control are tested using different sensor characteristics. It is demonstrated, on the one hand, how an increasing response time will limit the achievable control quality and, on the other hand, how a given sensor characteristic can be taken into account for the controller design. The presented ...
The OUR Set-Point method is useful for controlling the activity and loading-rate capacity of an activated sludge mixed liquor. In this case, sufficient amounts of a stock substrate are added to a mixed liquor suspension to provide kinetic saturation with subsequent measure of OUR. Once an acceptable substrate is found for a specific wastewater treatment plant, an OUR can be identified that ...