Explains about temperature measurement and controlling, temperature sensors & measurement techniques. Open loop and closed loop control system

1. Temperature controller of
hot and cold reservoir
By-
Akshay Dhole

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

3. 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.

4. Temperature measurements sensors
1.Thermocouple
2.Platinum resistance thermometer.
3.RTD

5. Temperature Measurement and Control
• Open loop system
- Temperature measurement
• Close loop system
- Temperature Control

6. Temperature measurement

7. Temperature control

8. 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.

10. Boiler temperature Controller
1.Single Acting
2.Dual Acting
3.Triple Acting

11. Limit Switch
The boiler temperature control acts as a limit switch.

12. • Maintaining low limit
• Maintaining High limit

13. • Circulator Function

14. Why we require Temperature controllers
• Proper Functioning.
• Corrosion and wearing.
• Safety.
• Effective efficiency.

15. Thank You