Integrated Assessment of a Combined Cycle Power Plant Using Experimental and Computational Energy Auditing Approaches
Keywords:
Combined cycle power plant, energy auditing, catalytic activity, plant efficiencyAbstract
Combined cycle power plants are considered efficient for power generation and their higher thermal performance is of importance to reduce emissions. Energy audits are typically conducted as one-time estimates in developing regions, which don't provide useful information. Power plants in these areas also lack any specific energy management practices. This study involved conducting an energy audit of a combined cycle power plant and comparing the real data with results from an Aspen HYSYS model. The steam turbine's computed efficiency was found to be 30.4%, which is 27.61% less than its specified efficiency. A potential energy saving of 8–9% is predicted if variable speed water pumps are used to boost the efficiency of steam turbines by 5%. In the case of combined cycle operation, the combustion efficiency of the gas turbine is crucial for greater steam generation through the heat recovery in addition to increased turbine power output.
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