Kevin Sanjoyo Gunawan

Optimization of Energy Efficiency and Conservation in Green Building Design Using Duelist, Killer-Whale and Rain-Water Algorithms

The development of green building has been growing in both design and quality. The development of green building was limited by the issue of expensive investment. Actually, green building can reduce the energy usage inside the building especially in utilization of cooling system. External load plays major role in reducing the usage of cooling system. External load is affected by type of wall sheathing, glass and roof. The proper selection of wall, type of glass and roof material are very important to reduce external load. Hence, the optimization of energy efficiency and conservation in green building design is required. Since this optimization consist of integer and non-linear equations, this problem falls into Mixed-Integer-Non-Linear-Programming (MINLP) that required global optimization technique such as stochastic optimization algorithms. In this paper the optimized variables i.e. type of glass and roof were chosen using Duelist, Killer-Whale and Rain-Water Algorithms to obtain the optimum energy and considering the minimal investment. The optimization results exhibited the single glass Planibel-G with the 3.2 mm thickness and glass wool insulation provided maximum ROI of 36.8486%, EUI reduction of 54 kWh/m2year, CO2 emission reduction of 486.8971 tons/year and reduce investment of 4,078,905,465 IDR.

Air Intake Prefilter Application at GT 13E2 PT. PJB UP Muara Tawar to Increase Plant Reliability, Availability, and Maintenance Time Interval

The role of air intake filter in gas turbine is very important to produce clean air into combustion chamber. Combustion can perform perfectly in proportional rasio of fuel and oxygen.Filter air intake of gas turbine GT 13E2 use cylindrical cartridge filter type and it is installed vertically. air intake filter performance reduce rapidly if operated in dirty ambient air. This condition require filter replacement to maintain air mass flowrate that required in combustion. However, displacement cannot be performed while plant under operation. Therefore, the effort to increase life time of filter is necesary. Existing air intake filter in block 1 utilize 900 pieces of Donaldson brand. the specification of filter are 16 inches outside diameter. 34.5 inches height. celulose base with pourusity 52μ. To reduce amount of attached particle in filter surface, installation weather louver is required. In order to increase plant reliability, availability and maintenance time interval of gas turbine, installation of prefilter and wheater louver at intake of compressor have been performed. This effort provide increasing plant reliability, availability and maintenance time interval. Finally, the benefit of this effort increase productivity of electricity and company profit.

Optimization of Prefill Mode to Increase Reliability of Gas Turbin 13E21 PT. PJB UP Muara Tawar

Muara Tawar block V is constructed by PT. PLN (Persero) Power Plant Master Project of Java, Bali and Nusa Tenggara Networks based on contract No. 261. PJ / 041 / DIR / 2007 (Concerning Gas Fired Power Plant Extension Project). The plant use gas turbine type 13E2. Operational concept of gas turbine type 13E2 is regulating the amount of fuel that is divided from three fuel control valves and the operating pattern is in an area known as the pilot valve and premix valve which must be maintained stability of combustion shown by pulsation parameters. The prefill concept is used to avoid flame off when gas turbine loading often passes over point switch or back point switch. Prefill itself will momentary activate a pilot valve to fill the Fuel Distribution System (FDS) line from MBP43. However, prefill gives effect of high pulsation that trigger Gas Turbine experiencing PLS or derating. This effect can be overcome by improving the prefill concept and modifying the prefill system through Logic Advant, resulting in a more stable burning in the gas turbine burner.

Improvement in Grs Compressor System to Increase Reliability of Combined Cycle Power Plant PT. PJB UP Muara Tawar

Fuel gas is the main fuel used in PT PJB UP Muara Tawar combined cycle power plant. Reliability of combinend cycle power plant can be affected with fluctuative supply of fuel gas. Fuel gas supplied by PGN with pressure range 24-26 barG. Because of fluctuative pressure from supplier, pressure of gas must be adjusted by using Gas Receiving Station (GRS) system. There are HMI local panel in GRS as interface. HMI local panel consist of bypass system and fuel gas compressor system. Bypass system used to decrease gas pressure when gas pressure above the upper limit while compressor used to increase gas pressure when gas pressure under lower limit. GRS have an important role in operational Block 5 PT PJB UP Muara Tawar. In 9 December 2011-26 Januari 2015 period, Block 5 can not be operated because of mechanical seal failure in fuel gas compressor in GRS. Ordering new seal has take a long time. GRS can not be operated when compressor gas fail due to fluctuatif pressure of supplied gas. Moreover, GRS has far distance from main control room (MCR). It will be difficult to monitor GRS parameter from control room. By this problem, research and improvement in GRS should be done so that performance of GRS can be improved. Improvement in low limit fuel gas pressure was performed. By this changing, inlet pressure GT operation has wider range. In addition, making 1K changeover can increase GRS performance. The addition of overview, parameters, alarm indicators on Alspa HMI can improve the reliability of the operation of Gas Turbine because the operator can respond faster when there is a change of parameters in GRS.

Method Of Valve Preventive Maintenance Via Additional Overview On Pos For Decreasing Failure Risk At Starting And Change Over Fuel Gas To Fuel Oil In Block 1 And 2 Gas Turbine GT13E2 PT. PJB UP Muara Tawar

Block 1 and 2 Combined Cycle Power Plant (CCPP) Muara Tawar have 5 units gas turbine can be operated by using fuel gas. Due to limitation of fuel gas from gas company. Several gas turbine are operated using High Speed Diesel fuel (HSD) to fulfil load demand. The equipment that used for fuel gas system must have high realibility to serve in dual fuel system neither operated using fuel oil or gas without unit trip. In actual, there are several disturbances occur during change over from gas to oil, even when the plant operated using fuel oil. From the data of failure causes, one of the failure causes is valve failure. By considering the availbility of plant, in term of possibility to modify instrumentation and control system, gas turbine 1.3 was choosen as object of the study. Additional indicator in HMI can be described as follows additional pressure switch attribute at EDS-P3 using symbol K, upload program to EPROM at card 70BK06 as communication card, and the cycle time less than 1 second in both valve open or close. It indicate valve system under good condition or no maintenance action is required. Valve maintenance at gas turbine ALSTOM 13E2 in Block 1 and 2 CCPP Muara Tawar can be done by additional indicator of pressure switch and aux relay contact as feedback signal on POS 30. Therefore, no disturbances in valve system and gas turbine performance increases.

Green Practice by Utilization of Waste Water Blowdown as Domestic Water PT. PJB UP Muara Tawar

In PT. PJB UP Muara Tawar, amount of domestic water consumption is higher than ammount of available water from groundwater and district Water Company. In order to fulfill of domestic water demand, improvement to increase water availability in PT. PJB UP Muara Tawar is needed. One of solution is reuse wastewater from continuous blowdown (CBD). CBD wastewater is the contaminated water especially solid content along steam water cycle. CBD waste processing has been done to process waste water into domestic water. From laboratory test results were obtained the best mixture of waste and fresh water with a ratio of 1:48 to produce domestic water. From an economical view of point, this process can reduce costs for the production or purchase of raw water. During 6 months, the obtained saving is IDR 62.822.259,

Hazardous and Toxic Waste (B3) Reduction Program by Reuse GT Battery in PT. PJB UP Muara Tawar

Battery is one of the toxic and hazardous materials. Used batteries are one of hazardous and toxic waste because it contain mercury, manganese, lead, cadmium, nickel and lithium which are harmful to the environment and human health. Battery waste shouldnt be disposed of in public landfills because it will pollute the soil, and groundwater. PT. PJB UP Muara Tawar have various innovative efforts to reduce hazardous and toxic waste generation, one of them with the reuse of ex GT batteries. This is done as commitment PT. PJB UP Muara Tawar maintain nature conservation through reuse battery ex GT. PT. PJB UP Muara Tawar implement some programs such as Marsela, Eco Utility and Fasum Mandiri Energi to reduce hazardous and toxic waste especially the battery produced. The hazardous and toxic waste reduction program by applying the ex-battery reuse shows significant results on waste reduction. This can be seen from the percentage of reuse of ex GT battery which reaches 61.8% and the cost savings of 5,959 thousand rupiahs during 2013-June 2016.

Adjustment Of Logic Operational Of Chemical Injection Pump In Ph Control Of Water Steam Cycle To Improve Steam Turbine 5.8 Reliability Of Power Plant Pt. Pjb Up Muara Tawar

Water quality in power plant is the main factor of equipment reliability. Standard water quality can assure performance of equipment and minimize equipment defact especially from corrosion. In Block 5 UP Muara Tawar, water is used to producing steam from HRSG. Actually pH for HP drum is 30% above the upper limit. To overcome this problem, it is needed to do some adjustment with the method as follows: data collection from process information system, brainstorming with operation, engineering and instrumentation to improve quality of water for short and long term period of operation, perform temporary corrective maintenance by Operate CBD in higher opening Operate phospate chemical injection manually based on pH set point or regulate based on time, literature review about logic system of phospate chemical injection in drum and make a research plan to find source of problem. From adjustment of operational logic injection pump the pH and conductivity value is under control in both higher and lower limit. It is shown that pH value are laid in 9.0-9.4. Moreover, the actual conductivity value are about 7.23 μs /cm and 21.34 μs /cm, respectively. It is match with ABB conductivity limit i.e. maximum 40 μs /cm. Morover, water consumption decrease from 6413 m3/days to 45.1 m3/days

3R Implementation in Waste Management at PT. PJB UP Muara Tawar

The waste problem are also an important issue for PT. PJB UP Muara Tawar power plant. The waste can contaminate the rain and river water, then flow to the sea. As we know, the power plant condenser utilize sea water as cooling fulid. The sea water will flow through pump and filter. The waste contamined in water sea has posibility to clog the intake of filter. As point of view from management of PT. PJB UP Muara Tawar, the sea water pollution due to solid waste can affect the operation and maintenance of power plant, meanwhile, it can impact to the society health awareness. Hence, this program is very important to the company and society and it is in line with Sustainable Development Goals (SDGs) i.e. clean water and proper sanitation. This program was initiated by PT. PJB UP Muara Tawar and it is perfomed by employment with the main objective improve clean environmental and society healthy. Waste reduction is done by reduce the use of objects that can generate waste, waste disposal according to type, and advanced processing of waste such as composting. This program have been succesfull implemented. From this program the amount of solid waste are reduced. Organic waste are reduced by 0.8 ton in 2013, 511 ton in 2014, 401 ton in 2015 and 271 ton in 2016. Inorganic waste are reduced 19 ton in 2013, 529 ton in 2014, 418 ton in 2015 and 279 ton in 2016.

Integrated Waste Management in PT. PJB UP Muara Tawar

Now a day environmental issues, especially the domestical solid waste/garbage problems in Bekasi Distric are still an unresolved problem. The waste increase over the time due to increase in population and human activities. The waste problem are also an important issue for PT. PJB UP Muara Tawar power plant. The waste will contaminate the rain and river water then flow to the sea. As we know, the power plant condenser utilize sea water as cooling fulid. The sea water will flow through pump and filter. The waste contamined in water sea has posibility to clog the intake of filter. From management of PT. PJB UP Muara Tawar point of view, the sea water polution due to solid waste can affect the operation and maintenance of power plant, as well as the impact to the public healthy. Hence, this program is very important to the company and society and it is in line with Sustainable Development Goals (SDGs) i.e. clean water and proper sanitation. This program was initiated by PT. PJB UP Muara Tawar and it is perfomed by society with the main objective i.e. increasing the income of society, improve clean environmental and society healthy. The program is performed by collecting garbage at waste processing facilities then sorted according to its type (paper or plastic). Plastic waste will be washed in the tub to remove dirt and put into the washing machine for further cleaning process. The waste put into the press machine to solidify and then the garbage sold to garbage collectors. This program have been succesfull implemented. From this program the society have been educated and achieve an extra income about IDR 5.9 million per month or in another word, this program can reduce waste about 2.5 tons per month.