Temperature control techniques?

I need to find out about some techniques that are used to control temperatures i need pictures as well but i can't find anything on google.





Does anyone know of any?Temperature control techniques?
Temperature control is a very big engineering field.But unless u are specific it is difficult to answer. Controlling the room temperature or steam temperature or a satellite temperature


Control input heat,


Spary water to reduce heat, desuperheat,control combustion rate


On off control, analog control


Room temp in winter measure the temperature, control th heater by electric supplyTemperature control techniques?
a thermostat made of a bimetallic strip


An electronic control device made of a thermistor, opamp and relay


An electronic control device made of a diode temperature sensor, opamp and relay





above are all on/off controls. The heater is turned off when it reaches the set point, then turned off when it cools below the set point. It continues to cycle on and off to keep the temperature near the set point.





The latter two types can also be used in proportional controls, where the amount of heat is controlled via a feedback loop and a high power linear controller of some sort so that when the set point is approached, the power to the heater is reduced, and the loop adjusts the power level to just maintain the required temperature.





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I assume you are talking about control algorithms, not heating or sensing mechanisms.





Some useful key words for your search:





PID (proportional integral derivative control)


';control algorithms';


';bang-bang control';


';hysteresis control';





These will lead to more subjects to be searched.





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Regards,





John Popelish

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