Temperature controller of hot and cold reservoir

By-Akshay Dhole

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Index •Introduction•Temperature sensors•Temperature measurement and control•Alarm and safety•Boilers temperature control•Need of temperature measurement

Introduction• Whatever the process or the parameter (temperature, flow,

speed for example), the principles of control are similar.

• Input and output signals are specified as appropriate to the application, usually Analog (e.g. thermocouples signal input, solid state output power control) but these may be digital.

• Temperature controlling: 1. Temperature measurement.2. Temperature Control.

Temperature measurements sensors1.Thermocouple

2.Platinum resistance thermometer.

3.RTD

Temperature Measurement and Control• Open loop system

- Temperature measurement

• Close loop system- Temperature Control

Temperature measurement

Temperature control

Alarm and safety

• In case of over and under temperature occurrences, they should never be relied upon for plant safety.

• If there is any possibility that component or sensor failure could result in heating power being permanently applied instead of regulated then a completely independent over-temperature alarm should be utilised.

Boiler temperature Controller1. Single Acting

2.Dual Acting

3.Triple Acting

Limit SwitchThe boiler temperature control acts as a limit switch.

•Maintaining low limit

•Maintaining High limit

•Circulator Function

Why we require Temperature controllers

•Proper Functioning.•Corrosion and wearing.•Safety.•Effective efficiency.

Thank You