• Operate one Slurry Pump Around “Operate one Slurry Pump around” is the project of reduction of electricity consumption of lower compartment of fractionation tower “53C101”, one slurry pump is operated instead of two slurry pumps. Generally, in fractional distillation, at the bottom of a fractionating column, the temperature of the slurry oil is quite high, at 330 ํC. It is required to reduce this temperature before reverting to fractionating tower “53C101” in order to maintain the level of heat in tower suitable for refining the distillates. In reverting slurry oil to transfer heat before flowing into fractionating tower, it is generally required for two slurry pumps to be operated which are 53P102B and 53P102C and one slurry pump “53P101A” is prepared as stand-by pump. According to the objective of this project, it enables the adjustment of slurry pump operation condition from two slurry pumps to only one slurry pump without any negative impact to fractional distillation. As a result, the project helps save electricity cost by 3.5 million baht per year or decrease electricity consumption by 201 KWh as well as GHG emissions reduced by 366 tons of carbon dioxide equivalent(tCO2eq). • Power consumption diminution of the compressor in the Refrigeration system at HDPE plant The purpose of this project is to decline the energy use of the gas compressor (Compressor) in the refrigeration unit by reduction of the inlet pressure of the compressor from 1.3 BarG to 1.0 BarG. In HDPE Plant, there are 3 sets of refrigeration systems and typically 2 sets are in operation. The functionality of refrigeration system is to reduce the temperature of substances used in the production process in HDPE plant. The selected type refrigerant is R22. The main equipment of refrigeration system are compressor, evaporator, and condenser. And refrigeration compressor is the heart of the systems, acts as pump that moves the refrigerant through the system and requires power supply. Reducing the inlet pressure from 1.3 BarG to 1.0 BarG leads to the reduction of power consumption from 420 kWh to 390 kWh per 1 compressor with the unchanged performance of the cooling system. This project reduced energy cost by 1,435,200 baht per year while greenhouse gas emissions decreased by 54 tons of carbon dioxide equivalents (tCO2eq). Reduce energy cost 1,435,200 baht per year Reduce GHG gas emissions 54 tCO2eq Save energy consumption 201kWh Save energy cost 3.5 MB per year, Reduce GHG gas emissions 366 tCO2eq 154 56-1 One Report 2022 IRPC PUBLIC COMPANY LIMITED
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