Overview of Energy Conservation of Auxiliary Power in Power Plant Processes

The major portion of electrical power is produced from combustion of fossil fuels, especially coal [24]. Electrical power generation through combustion of fossil fuels like coal emits gases like carbon dioxide (CO₂), sulfur oxides (SO_x), nitrogen oxides (NO_x), chlorofluorocarbons (CFC), and suspended particulate matter (SPM). Global warming is a great concern due to the burning of fossil fuel for electrical power generation in thermal power plants. World electrical energy increased from 10,122 to 20,353 TWh/year from 1990 to 2014 and is shown in Figure 2.1 [25]. CO₂ emission from electrical power generation is about 13,393 million t/year (41.2% of total CO₂ emission). Worldwide electrical energy generation through CO₂-emitting technology (fossil fuel based) is about 86.9% of total electrical energy generation and non-CO₂ emitting technology is 13.1% of total electrical energy generation (see Figure 2.2) [25]. The energy share for renewable is about 1.9%, hydro is about 6.7%, and nuclear is about 4.5%. This shows that major electrical energy comes from fossil fuel-based power plants, which release more pollutants into the atmosphere.