Energy is one of the crucial aspects that the company needs to run business activities both in the field and in the office. In the field, namely mining locations, fuel energy is needed to operate heavy machinery and equipment. Meanwhile in offices, electrical energy is required for lighting, powering electronic devices, and etc. The company also has a PLTU and solar power plants that are used to meet electrical energy needs in addition to using PLN. This is in order to realize the Company's commitment to developing new and renewable energy. [103-1, 103-2]
In the energy efficiency context, the Company has also made a Energy Efficiency Resource Policy for Electricity and Fuel with Energy Managers who have been certified by the National Professional Certification Agency (BNSP)/ LSP-HAKE. Energy Manager responsible for implementing the policy. Energy management has been carried out starting from strategic planning with clear goals and schedules, implementation, to monitoring through energy audits which are carried out both internally and externally. [103-2]
The Policy on Energy Efficiency Resources for Electricity and BBM has been made since 2017. PTBA always innovates in making energy efficiency efforts. The latest innovation that has been successfully implemented, as follows:
1. Mulut Tambang Coal-Fired Power Plant
The company started operating electricity with Tanjung Enim Coal-Fired Power Plant with a capacity of 3x10 MW. The innovation was made by changing the power supply system in the Hot Splicing ToolS Vulcanizer equipment. The element of novelty in this program is the Addition of Components, where the power supply system initially uses electrical energy from a generator that requires diesel fuel to utilize electrical energy from the 3 x 10 MW Mine-Mouth PLTU. In addition, changes have also occurred in digitalization-based control and metering systems that can monitor electrical energy consumption. Through this program, the company saves fuel consumption (diesel) of 45,360 liters, equivalent to 1,751.16 GJoules or 0.034% of the total diesel used in 2019, which is IDR389,052,720 (assuming the price of industrial diesel fuel IDR8,577/liter in 2019). The added value obtained is Behavior Change in the form of emission reduction of 121.11 tCO2 e (1 liter of BBM ≈ 0.00267 tCO2 e) and the implementation of energy conservation in Good Mining Practice. [103-3]
2. Engine State Monitoring Program
The Engine State Monitoring program that can reduce fuel consumption by 52,017 liters is the Engine State Monitoring Low Idle Dump Truck as the application of the latest Industry 4.0-based technology, which previously did not allow low idle monitoring in the Hauling Dump Truck unit. The quantification of environmental improvements due to changes in this system in the form of changes in the value chain of the entire system (changes in methods, changes in behavior, and more accurate data accuracy) is a reduction in fuel consumption of 3,954 GJ per year (1 liter of fuel ≈ 0.038 GJ) which is equivalent to a reduction in emissions amounting to 277.7 tCO2e (1 liter of BBM ≈IV - 160.00267 tCO2 e) and the implementation of energy conservation in Good Mining Practices.
3. E-Mining Reporting System
An innovation made in the implementation of the latest Industry 4.0 technology in the mining reporting system in the form of coal and overburden (OB) reporting. The novelty element of the E-Mining Reporting System program is that it has succeeded in replacing the previously conventional sub-system (reporting using operational vehicles) to become a real time reporting method using the E-Mining Report System application. Through this program, the company successfully reduce vehicle operating distance by 157,226 km/year, which is equivalent to saving fuel consumption (diesel) of 1,257,811 liters per year. The savings in fuel (diesel), if converted to a value of IDR10.78 billion per year (assuming the price of industrial diesel fuel IDR8,577/liter).