Chemistry Dep., Faculty of Engineering, Tarbiat Modarres University

1)  Design, Fabrication & Start-up of Software & Electronics of Fouling Mitigation
     Experimental Setup [2006]
     It has equipped with internal flash memory for long time data & events logging, 8 channels of
     Thermocouple Reader, Temperature-PID-Controller & 40 Ampers Isolated PWM Heater Drivers

Interface Windows xp power electronics.

In electrical engineering and industry, Thermocouples are a widely used type of temperature sensor and can also be used as a means to convert thermal potential difference into electric potential difference. They are cheap and interchangeable, have standard connectors, and can measure a wide range of temperatures. Thermocouples are most suitable for measuring over a large temperature range, up to 1800 °C. They are less suitable for applications where smaller temperature differences need to be measured with high accuracy, for example the range 0–100 °C with 0.1 °C accuracy. For such applications, thermistors, resistance and solid-state temperature detectors are more suitable.

A Proportional–Integral–Derivative controller (PID controller) is a generic control loop feedback mechanism widely used in industrial control systems. A PID controller attempts to correct the error between a measured process variable and a desired setpoint by calculating and then outputting a corrective action that can adjust the process accordingly. The PID controller calculation (algorithm) involves three separate parameters; the Proportional, the Integral and Derivative values. The Proportional value determines the reaction to the current error, the Integral determines the reaction based on the sum of recent errors and the Derivative determines the reaction to the rate at which the error has been changing. The weighted sum of these three actions is used to adjust the process via a control element such as the position of a control valve or the power supply of a heating element.

Experimental Setup

Chem. Eng. Dep. Opinion