SPECIFICATIONS
Part Number: IC3600STKD1F
Manufacturer: GE Fanuc
Country of Manufacture: United States(USA)
Availability: In Stock
Product Type: Temperature Control Board (SCB)
Functional Description
IC3600STKD1F is a Temperature Control Board manufactured by GE Fanuc. It is a part of Mark I and II control systems. Temperature control is an essential aspect of turbine operation, ensuring that fuel flow is adjusted to maintain safe and optimal turbine temperatures. The primary function of the temperature control system is to limit fuel flow during startup or when the turbine reaches its maximum safe operating temperature, thereby preventing damage to critical components. This control loop is activated whenever the turbine exhaust temperature approaches a preset limit.
Features
- Temperature control is an aspect of turbine operation, ensuring that fuel flow is adjusted to maintain safe and optimal turbine temperatures. The primary function of the temperature control system is to limit fuel flow during startup or when the turbine reaches its maximum safe operating temperature, thereby preventing damage to critical components. This control loop is activated whenever the turbine exhaust temperature approaches a preset limit.
- In this system, the turbine exhaust temperature is continuously monitored by a sensor. This measured temperature is then compared to a setpoint temperature that represents the maximum safe operating temperature. The difference between the measured exhaust temperature and the setpoint is amplified, and this signal is used to adjust the fuel flow to the turbine. If the exhaust temperature exceeds the setpoint, fuel flow is reduced to help bring the temperature back down. Conversely, if the exhaust temperature is below the setpoint, fuel flow is increased to help raise the temperature, ensuring the turbine operates at the desired level of efficiency.
- The temperature setpoint is dynamically calculated by considering both the turbine's exhaust temperature and the compressor-discharge pressure. This allows for a more accurate and responsive calculation of the maximum allowable exhaust temperature, based on the conditions within the turbine at any given time. By factoring in compressor discharge pressure, the system adjusts the temperature setpoint to account for changes in turbine load, operational conditions, and fuel availability, thereby optimizing performance while maintaining safety.
- To ensure the protection of the turbine's exhaust system and prevent overheating, the temperature setpoint has a maximum upper limit, typically around 1000oF. This upper limit is designed to safeguard critical turbine components, such as the exhaust system, by preventing temperatures from exceeding levels that could cause damage. When the temperature limit is active, the system maintains the turbine temperature within safe operating ranges, allowing the turbine to operate efficiently without risking equipment failure.
- The LM2500 turbine control system follows a slightly different approach to temperature control. For the LM2500, the temperature is sensed not only at the turbine exhaust but also between the gas generator and load turbines. The system then imposes a constant temperature limit based on these readings, ensuring the turbine operates within a set temperature range throughout its operational life. This approach provides a consistent and reliable method of temperature control for this specific turbine model.
- In terms of implementation, the temperature control system for two-shaft turbines typically uses analog electronic circuits to manage the control loop. These circuits compare the turbine's exhaust temperature to the setpoint and adjust the fuel flow accordingly. However, for single-shaft turbine systems, the temperature control is handled by a microprocessor-implemented system called the Integrated Temperature System (ITS). The ITS not only manages the temperature control function but also supports additional critical functions such as combustion monitoring, water injection, and modulated inlet guide vanes (IGVs). This integrated approach helps streamline control and ensures efficient operation by consolidating various turbine functions into a single processing unit.
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FREQUENTLY ASKED QUESTIONS
What is GE Fanuc IC3600STKD1F?
It is a Temperature Control Board used in gas turbine control systems.
How does the turbine exhaust temperature control loop work?
The system continuously measures the exhaust temperature, compares it with a setpoint, and adjusts fuel flow to bring the exhaust temperature in line with the setpoint. The setpoint is dynamically adjusted based on factors like compressor-discharge pressure to optimize the operation and safety of the turbine.
What is the purpose of the temperature setpoint in the control loop?
The temperature setpoint acts as the target temperature that the control system aims to maintain. It is calculated by considering the turbine’s exhaust temperature and compressor discharge pressure, ensuring that the exhaust temperature stays within safe operational limits.
What happens if the exhaust temperature exceeds the setpoint?
If the exhaust temperature exceeds the setpoint, the system reduces the fuel flow to lower the temperature, preventing damage to turbine components. Similarly, if the temperature is too low, fuel flow is increased to raise the temperature.
