TGDEC Turbina de Gás de Dois Eixos, Controlada por Computador (PC)

The Computer Controlled Two-Shaft Gas Turbine, "TGDEC", has been designed by EDIBON to practically evaluate the behavior of a two-shaft gas turbine, analyzing performance, energy balance, and the interaction between its different stages.

The unit is configured with two main shafts:

• A first shaft corresponding to the high-pressure turbine or gas generator turbine, consisting of:

• a radial-type compressor,
• a tubular combustion chamber,
• and an expansion turbine.

• The compressor draws in atmospheric air and compresses it, increasing its pressure before entering the combustion chamber, where it mixes with the fuel and combustion takes place. The generated gases expand in the turbine, providing the energy required to drive the compressor, allowing self-sustained operation of the system.
• A second shaft corresponding to the low-pressure turbine or power turbine, in which the combustion gases, still containing energy, expand and convert their energy into mechanical energy. This energy is transmitted to a generator, enabling electrical energy production and the analysis of the overall system performance.

The "TGDEC" unit also includes:

• Start system: It consists of a centrifugal fan driven by an electrical motor. Air provided by this fan acts on the blades of the compressor, causing the rotation of the high pressure turbine.
• Fuel system: The line of fuel gas consists of a ball valve to open or close the feeding, a pressure regulation valve, a safety solenoid valve and an injector. It includes a rotameter type flowmeter to measure de gas consumption.
• Ignition system: The activation energy of the air-fuel mix will cause the flame ignition. It consists of an ignition electrode or spark plug feeded by an ignition transformer. An ionization electrode detects that the flame is ignited.
• Lubrication system: It consists of an oil tank of 5 l. From this tank, we dispose of a gear pump to impulse the oil to the bearings of both turbine shafts. The system is completed with a filtration unit and two regulation valves to select the oil quantity to feed to each turbine.
• Refrigeration system: It consists of a plate heat exchanger and a tubular heat exchanger through which the oil transfers its heat to the refrigeration water.

This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + a Control Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, for controlling the process and all parameters involved in the process.