Solar Street Lighting Light (PJU-TS) is a street lighting that uses sunlight as a source of electrical energy. The Solar Street Lighting (PJU-TS) is suitable for roads in areas not covered by PLN electricity and also areas experiencing electrical energy crisis especially in remote areas. But recently PJU Solar is also rife applied in urban areas such as in the main streets, residential street, garden lights, campus area, factory area, bus stops, parking lots, gas stations (gas stations) and so on. In the process of making solar lighting control system on the lamp for PJU is first to determine the load installed, then calculate the number of solar panels or photovoltaic needs, then calculate the battery requirements and determine the capacity of the battery charge regulator (BCR). Then for PJU lamps to operate automatically installed light sensor or light dependent resistor (LDR) as a switch to turn on and off PJU lights.
Availability of roads is an absolute prerequisite for the entry of investment into a region, for this reason it is necessary to plan strong, durable and high durability pavement for plastic deformation. Damage in Indonesia is generally caused by excessive loading. The cause of damage to this pavement requires the use of material for higher quality road pavement in the form of aggregate material as a filler and asphalt as a binder. The addition of rubber waste to the concrete asphalt mixture is a solution for highway planning and reducing pollution of rubber waste produced by rubber factories. From the results of the addition of rubber waste mixture affect the flexibility and durability of asphalt, Marshall Quotien value and residual Marshall Stability that affect flexibility and durability when compared with normal mixtures decreased, the decrease in value was due to the number of cavities in the test object mixed with rubber waste. From the results of the mixture of rubber waste produced an optimization value on Marshall stability in the percentage of 6% rubber waste of 93.68% and Marshall Quotien in the percentage of 6% rubber waste of 272.20 kg / mm.
Fly slab is one of the precast concrete slab technological development that has been researched and patented by Ir . Sulistyana in 2011. The concept is how to reduce the mass of precast concrete slab with makes ribs on the concrete slab. To minimize the volume of concrete plate and while maintaining tensile area to makes the style transfer mechanism of concrete to reinforcement or otherwise, are expected to reduce the mass of the structure without reducing strength. Comparative study will be conducted in this research based on Planning of Building Construction Rusunawa in Surakarta, Central Java. This comparative study is done by compare the results of the structural design Rusunawa existing Surakarta and ready to build using conventional precast concrete massive, with a new structure plan Rusunawa Surakarta with using fly slab as material plate, beam and column structural elements using conventional concrete. Based on the analysis results, showed reduction in the volume of concrete and reinforcement elements beam and coloumn Rusunawa Surakarta structure is 20,25% and 6,3 %. Reduction reaction in the vertical structure of the Rusunawa Building in Surakarta is 16,93%.
rom EEOR, Electro Enhanced Oil Recovery, and a developing technology application which has been established earlier. The difference is ESOR relatively does not improve recovery factor of producing well. Ideally any crude oil producing well will be experiencing pressure decline which may affect crude oil production decrement, naturally. Regarding some similar researches around the world, the use of direct current electrical exposure was proven to increase number of heavy crude oil production. At least salinity, hydrocarbon chemical compounds and crude oil flow in the reservoir (electro-osmosis) involves during chemical processes in the reservoir while ESOR application. Number of electrons conducted from direct current electrical power supply will be a supporting media during chemical process of these parameters. Unfortunately after completing ESOR application in Lapangan X, the result was contradictive with this research hypothesis. Exposure of direct current electrical supply did not increased heavy crude oil production. On a contrary, parameter of salinity and API gravity as produced heavy crude oil quality, were improving significantly.
Salah satu unit yang paling penting dalam produksi uap pada PLTU adalah boiler. Salah satu boileh jenis PLTU sering digunakan adalah boiler tipe CFB (Circulating Fluidized Bed), dan jenis bahanbakar batu bara yang digunakan banyak mengandung zat basa. Superheater merupakan salah satu komponen terpenting pada boiler. Superheater berfungsi untuk memanaskan uap agar kandungan energi panas dan kekeringannya bertambah sehingga menjadi uap superheat. Permasalahan yang sering terjadi pada superheater yaitu penumpukan abu (fouling) yang terjadi pada tube superheater tersebut. Unsur yang paling berpengaruh pada fouling adalah material basa terutama kadar Na2O. Bila kadar abu batubara banyak, kemudian unsur basa dalam abu juga banyak, ditambah kadar Na2O yang tinggi, maka fouling akan mudah terjadi. Kadar sulfur yang tinggi cenderung mendorong timbulnya fouling. Fouling dapat menyebabkan penurunan laju perpindahan panas antara flue gas dengan steam pada superheater. Potensi fouling dapat diukur menggunakan suatu persamaan, tetapi persamaan tersebut hanya memperhitungkan chemical composition dari batubara tersebut. Dari penelitian diperoleh hasil terjadi penurunan laju perpindahan panas untuk high temperature superheater dari sootblowing satu ke sootblowing selanjutnya sebesar 511,8458 kW atau sekitar 3,012%. Sedangkan penurunan laju perpindahan panas untuk low temperature superheater dari sootblowing satu ke sootblowing selanjutnya sebesar 3421,506 kW atau sekitar 13,028%. Unsur yang paling berpengaruh pada fouling adalah material basa terutama Na, yang dalam hal ini kadar Na2O. Potensi terjadinya fouling yang dihitung dari data analisis fly ash menunjukkan nilai potensi fouling sebesar 4,0069 yang masuk dalam kategori potensi fouling tinggi pada fly ash lignit.
The depletion of petroleum reserves makes people always try to find alternative energy to meet their daily needs. Especially for fuel oil in vehicles whose price is increasing, making scientists to look for alternative energy as a vehicle. Electric motors are one of the alternatives currently being promoted to replace oil-fueled vehicles. There are many types and models of electric motors in the community. The research that will be done is to test the performance of electric motorcycle used by PLN Cengkareng Area for the activities of Quick Service Unit (ULC = Unit Layanan Cepat) and compared with conventional motorcycle fueled by premium oil
The demand for electricity will continues to increase each time, this is because of the number of PLN’s customers will continues too to grow each year. Therefore, this is directly proportional to growing the amount of electricity that have to be streamed. With the increasing of the number of PLN’s customers, the provider (PLN) have to increase the amount of electricity supply as well. In the era of globalization, the efficiency of electrical power has always been the main issued, both from the providers and the customers. Therefore, the realibility of distribution system of electrical power will been the main issued as well. The index that showing the reliability of the distribution system of electrical power is SAIDI (System Average Interruption Duration Index) and SAIFI (System Average Interuption Frequency Index). As small as the value of the indexes, both SAIDI and SAIFI is so the more reliable the system, which means the efficiency of the distribution system is good (high efficiency). In this research will be discussed about the analysis of SAIDI and SAIFI values of Cahaya feeder, as well as how to suppress the value of SAIDI and SAIFI. Realibilty index SAIDI and SAIFI on Cahaya Feeder in the year of 2017 is 2.277 hours/costumers/year dan 2.406 time/costumers/years. That is reliable based on SPLN 59:1985 standard. Cost loss in year of 2017 due to outage on the Cahaya Feeder is IDR 12,794,305,-
One way to optimize the flow of energy on a distribution channel is to reconfigure the network. This research aim to get optimal distribution system at PT.PLN Area Banjarmasin Penyulang BJM02, MTL04 and MTL10. The MTL10 repeater that will be recovered by reconfiguring the network to divide the load on the nearest repeater is the BJM02 and MTL04 feeders. This study uses 3 scenarios with regard to the state of the existing network to obtain a minimum power loss. In order to obtain a good conclusion then the analysis obtained that before the reconfiguration penyulang BJM02, MTL04 and MTL10 experienced energy losses 521,286 W. Resolving the problem then the network reconfiguration can be done on the BJM02 Repeater will divide the load of KST02 and the load of the earth in the circumference basirih earth in the feeder MTL04 to the MTL10 feeder. In configuring the network the thing that can be done is to open the KST02 circuit breaker at the KS.Tubun relay substance and close the disconneting switch (BJM02 Repeater) so that it connects with the MTL04 repeater. The MTL04 repeater will cut the muzzle throughput cable and connect the cable to the earth's basirih circular housing so that the load until KST02 is connected. The results obtained after reconfiguration can minimize power losses of 20,418 W.
In power systems, particularly in medium voltage 20 kV feeder that are its length exceeds 100 kms the same thing is found in many tissues PT. PLN (Persero) outside Java island for example in South Sumatra in feeder Tomat Mariana substation 105,094 kms in length and threshold voltage feeder receive Tomat at 16,397 kV. According to the standards established by SPLN: 72 of 1987 in the amount of 5% to JTM with radial configuration in this paper will discuss what steps need to be done to correct the voltage at the feeder Tomat Mariana substation with the help of ETAP 12.6.0 application using methods repair replacement Conductor , installation of capacitors and transformers Tap settings.
Rising temperatures can lead to bearing the risk of the gas turbine trip. Because of the many possible causes of bearing temperature increases, the temperature monitoring system required bearing space as an indication of a gas leak heat on the room bearing and additional more accurate analysis to determine the cause of the high temperature turbine bearing. The system of monitoring the temperature in the room bearing will monitor continuously, so that any interference was observed immediately handled by appropriate methods and the possibility of operating losses for their trip from the increase in turbine bearings can be avoided.