Quantitative Modeling of Aero Derivative Gas Turbine – In alliance with the Nigerian Industrialization Project

Reference technology is LM2500 plus G5 for power generation. The study is centered on modeling. Applied thermodynamics principle for the modeling of aero derivative gas turbine is Brayton cycle. International Standard Organization (ISO) was referenced. Some of the LM2500 plus G5 parameters were referenced, while gas/steam table was referenced for others as detailed in the parameter analysis sections. Upgrade was done by introducing intercooler into the turbine as auxiliary accessory to reduce inlet air temperature to 150C and additional blade stage to the compressor. Modeling was done in three fronts of 150C inlet air temperature and additional blade stage introduction into the axial compressor, applied the turbine output power loss principle due to increase in ambient air inlet temperature of 300C (indicative of the Nigerian actual environmental condition) and finally, economic gains of the upgrades. Modeled turbine at 30 C ambient air inlet temperature by applying the rule of thumb (17 blade stage) resulted to 30 mw. Modeled turbine at 150C ambient air inlet temperature with Intercooler in place (17 blade stage) generated an output power of 35.5 mw. Modeled turbine at 150C ambient air inlet temperature with Intercooler and an additional Compressor stage (18 blade stage) generated 48 mw. Economic gains of modeling intercooler into the aero derivative gas turbine per hour = 5,323mw = NGN 638,760,000 per hour of power generation at NGN 120,000,000 per mw. Economic Gains of modeling an additional compressor blade stage into the ADGT = 12,764 MW = NGN 1,531,680,000 per hour of power generation