LIFE CYCLE ASSESSMENT STUDY OF COMBINED CYCLE POWER PLANT IN NORTH JAKARTA

• Main Author: Ari Ruwaedi, Muhammad
• Format: Theses
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/53594
• Institution: Institut Teknologi Bandung

Energy sector is the primary contributor for the economy and industrial achievement as well as the necessity for providing basic human needs. One of the PT. X’s power generation units which is located in North Jakarta, is the Gas and Steam Power Plant or Combined Cycle Power Plant (CCPP). The selected method to evaluate CCPP’s environmental impacts is Life Cycle Assessment (LCA) based on ISO 14040. By conducting the LCA, the magnitude of the environmental impacts resulting from the electricity generation activities at the power plant can be expected. The scope for this research is gate-to-gate with unit functional of 1 kilowatt hours (kWh) electricity production. Electricity generation activities in CCPP will be divided into 4 subsystems: i) energy preparation subsystem, ii) water production preparation subsystem, iii) electricity generation subsystem, and iv) supporting system. The impact categories that will be assessed in this study are Global Warming Potential (GWP), Eutrophication Potential (EP), Acidification Potential (AP), and Human Toxicity Potential (HTP). In LCIA, the characterisation is using CML characterisation factors and the normalization is using CML-World 2000 normalisation factors. LCI result shows that 3,91E-04 m3 of natural gas, 1,30E-03 m3 of sea water and 0,0671 kWh of electricity are needed to generate 1 kWh electricity. LCIA results shows that the impact category value for GWP 3,72E-02 kg CO2 eq., AP 6,23E-04 kg SO2 eq., EP 1,63E-04 kg PO4 eq., and HTP 1,28E-03 kg 1,4-dichlorobenzene eq., in order to generate 1 kWh of electricity. Normalization results shows that the acidification potential is the most significant impact with a normalization value 2,61E-15. Thus, the significant issue from this LCA study is NOx emission from combustion chamber and the hotspot is combustion chamber. There are three improvement scenarios to reduce NOx emissions by using (1) Wet Low Emission, (2) Selective Catalytic Reduction, and (3) Selective Non-Catalytic Reduction. Scenario no 2 is the best scenario to reduce NOx emissions with almost 85% reduction rate.