Temperature Spread Monitor

Monitoring the spread of temperature in the exhaust gases can lead to early detection of combustor and burner faults and can prevent catastrophic failure of a plant. TCL have developed a cost-effective solution to gas turbine exhaust temperature spread monitoring.

The TM41-TSM can be configured to monitor up to 24 thermocouple inputs. Standard versions are available for the following gas turbines:

• RR Avon/RB211/Olympus;
• Ruston TD4000/TB5000/Tornado/Typhoon;
• LM2500/5000/6000/1600;
• GE Frame 3/5/6/7/9;
• Solar Mars/Centaur/Saturn

Inputs/Outputs

Inputs

• Up to 24 Thermocouple inputs.
• 8 Digital inputs, can be configured for:
  • alarm/trip inhibit.
  • Remote alarm accept/reset.

Outputs

• 8 Digital outputs, can be configured for:
  • Alarm initiation.
  • Trip initiation and indication.
  • Sensor fault.
  • Hardware fault.

Functionality

The spread monitor is programmed to perform functions in accordance with engine manufacturer's specification. The functionality for a Rolls Royce Avon, Olympus & RB211 is summarised as:

• Signal validation;– discount faulty inputs and alarm.
• Calculate average of healthy thermocouples.
• Calculate deviation of individual from average.
• Alarm on deviation exceeding alarm setpoint.
• Trip on deviation exceeding trip set point or number of failed thermocouple inputs exceeds set point.

Operator Interface

The Operator panel is a backlit ¼VGA graphic monochrome LCD display with keypad.;

Visual Display of important parameters to enable the operator to make quick and informed decisions on the status of the gas turbine. These parameters include:

• Logic I/O Status.
• Bar graph and Digital display of analogue values.
• Alarm and trip alphanumeric message, time and date stamped.
• Trend plot to view temperatures.

Commissioning modes will allow you to ease fault finding, set up forcing of outputs and adjustment of control parameters (Gains, setpoints etc.)