A temperature control valve is kind of control valve that maintain the temperature of a desired process at a specific level. The TCV measures the reaction temperature and either raises or reduces the cooling liquid flow rate to adjust the reaction temperature.
The regulator could also be used to adjust the flow quantity of steam that is typically used to heat a substance. Thus, the regulator can indirectly change the temperature of a specified medium by changing the flow rate.
Temperature control valve setup:
As shown in Figure, the structure of a typical heat regulator is made up of four primary components.
The temperature detection component, which, as mentioned above, is mostly a temperature sensor, sends an electrical or mechanical signal to the actuator through the connector.
This signal is then used by the actuator to act on the energy source, which determines the valve’s position.
Working:
The temperature regulator works on the basis of a mechanical temperature control instrument. As stated earlier, a heat conducting substance typically fills the regulator bulb.
The material extends as the temperature rises due to the thermal expansion characteristics of this substance. This extension creates a shift in the actuator stress that correlates with the medium temperature.
This pressure change repositions a valve on the regulator, which controls the flowrate of a coolant. The temperature of the medium is then altered by the change in the flowrate of this coolant.
Exchange of Heat Between Hot Process Fluid and a Cold Process Fluid:
Mixing does not take place in the temperature control heat exchanger system, but what happens is the transfer of energy between the cold and warm fluid. While the cold fluid moves through the pipe, the warm fluid moves through the exchanger shell.
The hot process fluid transfers heat energy to the cold process fluid, increasing the temperature thereby. However, the controller TC controls the cold fluid’s high temperature.
As shown in the above figure, The same philosophy of temperature control applies here with the TT transmitter detecting the temperature of the cold fluid and transmitting it to the TC temperature controller.