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PENGARUH BEBAN PENDINGIN TERHADAP KINERJA MESIN PENDINGIN DENGAN REFRIGERANT R134a DAN MC134 Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

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Direct replacement method refrigerant in the engine manifold coolant HFC R134a with hydrocarbon widely developed. Retrofit refrigerant in cooling machine is not known with certainty the optimal pressure on the compressor, resulting in evaporation temperature and shows the performance of air conditioner. This study aims to determine the effect on the performance of the cooling load of air conditioner using refrigerant R134a and MC 134 on the filling pressure of the refrigerant which is optimal. The parameters were observed in this study was the effect of optimal pressure on kompessor, temperature condenser, evaporator temperature, the cooling load on the performance of refrigeration. Experimental research is still done on a laboratory scale. The result showed that if the cooling load increases will take effect on increasing the amount of heat absorbed by the evaporator, the evaporator heat discharged, reduced compressor work, the mass of refrigerant in the system and COP decreased. The use of hydrocarbon refrigerant MC 134 positive impact of heat absorbed the increase in the evaporator, the heat rise in dumped konsendor, COP system, the mass of refrigerant circulating in the system is reduced and the compressor work will decrease. Retrofit refrigerant hydrocarbon refrigerant R134a with MC 134 is worth considering for a vapor compression refrigeration system.

PENGARUH PENGGUNAAN LSHX TERHADAP PERFORMA MESIN PENDINGIN DENGAN LAJU ALIRAN MASSA YANG SAMA PADA KONDISI TRANSIENT Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

There are three things that affect the development of of vapor compression refrigeration system : energy saving, non-ODP and non-GWP refrigerant charges. Keep in mind that the effect on GWP refrigerant and ODP substances occurs only when the substance is released into the atmosphere due to leakage in the refrigeration machine or replacement and recycling of refrigerant. Vapor compression refrigeration system is still used, as well as the type of refrigerant used predominantly of HCFC R22 and HFC R404A environmentally damaging and is scheduled to be removed. So to find an alternative refrigerant that is environmentally friendly and has a good refrigeration capacity such as by adding LSHX technology (Liquid Suction Heat Exchanger). LSHX technology is the use of heat exchanger equipment between the liquid line out the condenser and compressor inlet suction line. The present experimental used three refrigerant different i.e HFC R404A, as a comparison used to replace HCFC R22 and for replacement synthetic refrigerant used hydrocarbon R290 in the vapor compression refrigeration system with LSHX In transient conditions until steady conditions. The refrigeration system was charged with 2 kg of mass, 27oC ambient temperature, and for the calculation using software REFPROP 6. This research conducted in Refrigeration Workshop (Bengkel Pendingin) STT-PLN Jakarta. The results obtained showed the effect LSHX with same mass flow rate, trend the steady state temperature of evaporation HCFC R22 decreased of -16,7oC be -18,2oC, HFC R404A of -19,9oC be -22,2oC and HC R290 of -24,2oC be -27,6oC. Increase the COP, for HCFC R22 from 3,29 to 3,39, HFC R404A from 2,76 to 2,85 and HC R290 from 3,43 to 3,50.

RANCANG BANGUN METODE PEMBELAJARAN PRAKTIKUM CAD/CAM DENGAN MENGGUNAKAN PERANGKAT LUNAK GRATIS Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Computer-Aided Design (CAD) is a form of automation that helps designers to improve drawings, specifications, and design-related elements that use special graphical effects and computer program computations. The CAD system is run through PC for 2D design and modeling as well as drafting process, then executed and integrated with CAM (Computer Aided Manufacture) system adapted to CNC (Computer Numeric Control) format to be used. Inventor Software is one of the many CAD software that has many advantages, so it is unthinkable to design the learning method of CAD / CAM Practicum with combination of Autodesk Inventor Software with Hardware Machine CNC Roland EGX-350. The study was conducted on the even semester of the 2015/2016 school year at STT-PLN Jakarta. A more specific object is a student who takes the CAD / CAM course. The end result of the study, shows that from the respondents stated that the design by using AutoCesk AutoCAD Software has a level of convenience 67.62% (Easy). While using AutoDesk Inventor respondents stated having ease of 82.2% (Very Easy).

STRATEGI PENGEMBANGAN DAN PELAYANAN INDUSTRI OPTIK UNTUK MENINGKATKAN MINAT PELANGGAN AGAR KEMBALI (STUDI OPTIK XYZ DI BEKASI) Redaksi Tim Jurnal
JURNAL POWERPLANT Vol 4 No 4 (2017): JURNAL POWER PLANT
Publisher : Sekolah Tinggi Teknik - PLN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.464 KB)

Untuk mengetahui perbaikan dari pengaruh kualitas layanan, nilai yang dirasakan, atribut teknologi untuk mencapai kepuasan pelanggan sehingga ada niat pembeli kembali, menentukan kriteria faktor yang mempengaruhi prioritas utama agar ditingkatkan kualitas layanannya untuk mendekati harapan pelanggan ditentukan melalui hasil analisis IPA sehingga dapat disusun strategi pengembangannya terhadap industri optik. Metode yang digunakan penelitian ini adalah analisis deskriptif, uji validitas, uji reliabilitas, uji kecukupan data, Importance Performance Analysis (IPA), indeks kepuasan, analisis gap, analisis SEM dan analisis SWOT. Karakteristik pelanggan optik xyz dari 110 responden sebagian besar adalah berusia 31- 40 tahun sebanyak 56 orang berjenis kelamin perempuan, 29 orang memiliki pekerjaan sebagai karyawan swasta, 58 orang datang ke optik bertujuan membeli kacamata, dan dalam 2 tahun terakhir 2x kali kedatangan sebanyak 49 orang. Dari Hasil uji hipotesis kualitas layanan terhadap kepuasan pelanggan, atribut teknologi terhadap kepuasan pelanggan, atribut teknologi terhadap minat pelanggan kembali, signifikan yang berarti mempunyai pengaruh langsung, hasil nilai yang dirasakan pelanggan terhadap kepuasan pelanggan, kualitas layanan terhadap minat pelanggan untuk kembali, kepuasan pelanggan terhadap minat pelanggan agar kembali tidak signifikan yang berarti tidak memiliki pengaruh langsung. Kesenjangan atau gap dari hasil pengukuran persepsi dan ekspektasi sebesar -0,19 bernilai negatif, maka konsumen tergolong tidak puas. Hasil analisis IPA pada kuadran I adalah optik terletak di lokasi yang strategis, tempat parkir yang memadai dan aman, ruang pelayanan yang nyaman, kesiapan petugas untuk melayani customer dan menginformasikan pelanggan tentang kepastian waktu penyelesaian jasa yang menunjukkan atribut dimensi kualitas pelayanan yang sangat penting untuk diperbaiki. Dengan analisis SWOT diantaranya : setiap pembukaan cabang baru sekiranya selalu memperhatikan lokasi yang strategis untuk posisi optik dan tempat parkir jika membuka cabang ruko, selalu perhatian dengan lingkungan usaha, koleksi barang dengan harga terjangkau harus tetap tersedia agar menjangkau semua kalangan, membuat promosi iklan yang lebih menarik, pengembangan standar pelayanan, pengembangan standard operating procedur / SOP layanan pelanggan.

ANALISIS PENGGUNAAN LISTRIK ARUS SEARAH UNTUK MENINGKATKAN LAJU PRODUKSI MINYAK BUMI JENIS MINYAK BERAT Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

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.

IMPLEMENTASI LOGIKA FUZZY UNTUK SISTEM OTOMATISASI PENGATURAN PENGISIAN BATERE PEMBANGKIT LISTRIK TENAGA SURYA Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

Solar power plants (PLTS) as power plants that use solar rays to generate electrical energy have a big role in reducing the burden of reducing CO2 emissions. Electrical energy generated by solar panels in the form of direct current (DC / direct current) low voltage. This electrical energy will be collected and stored in a battery (accumulator / battery) through a battery charging controller or so-called solar charge controller that serves as a controller charging process so that the voltage and current are filled to the battery does not exceed the ability batteries or overcharge. This research will make the model of charging the batteries in the Solar Charger Controler by using Mamdani's fuzzy inference logic which is used to adjust the direct current that is charged to the battery and transmitted to the load on the PLTS system. This simulation is expected to be applied to a device that acts as a set of excess filling that is streamed from the solar panel to a fuzzy-based battery. Solar Charger based Fuzzy logic controller can be applied to automatically stop the activity if the voltage in the battery by adjusting the charging function and exemption of current from battery to load.

KAJIAN PEMASANGAN LIGHTNING ARRESTER PADA SISI HV TRANSFORMATOR DAYA UNIT SATU GARDU INDUK TELUK BETUNG Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

Generally, The power centers are connected to the air transmission line, and the airborne transmission channel is susceptible to disturbances that are affected from outside the system, one of which is a lightning strike. Lightning strikes are harmful to the components present in the central power supply. And therefore, the protection from the lightning strikes is required, so that the components in the power center is not damaged when exposed to lightning surges. In this research we discussed the power transformer protection (60MVA) on the Teluk Betung substation so that the power transformer is safe from the over voltage caused by the lightning surge. The specification of the arresters mounted on the HV side of the power transformer unit one of Teluk Betung substation with nominal voltage of 144 kV has been in accordance with the system requirements. The maximum distance between the arrester and the allowable power transformer is 28.5 meters. Distance in the field is 3 meters, the voltage that arrives at the power transformer is 480 kV and still below the Basic insulation level of the transformer, so that the protection of the power transformer against the lightning surge is very good.

KONTROL PENERANGAN TENAGA SURYA SEBAGAI IMPLEMENTASI DARI LISTRIK KERAKYATAN Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

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.

POTENSI PEMANFAATAN BIOMASSA SEKAM PADI UNTUK PEMBANGKIT LISTRIK MELALUI TEKNOLOGI GASIFIKASI Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

Energy consumption in Indonesia from year to year has increased significantly and this must be realized by the whole community. While the national energy reserves will be increasingly thinner so must be found new energy reserves. One of the most potential energy in Indonesia is biomass. Therefore, it is necessary to make various breakthrough in utilizing biomass, one of potency of biomass utilization is gasification. Therefore, it is necessary to make various breakthrough in utilizing biomass, one of potency of biomass utilization is gasification. As an agricultural country, Indonesia produces large quantities of biomass. One of the agricultural waste is rice husk, the weight of husk produced is 22% from the weight of dry milled grain. The availability of rural biomass has the potential to be used in power generation in areas not covered by electricity services.

PRAKIRAAN KEBUTUHAN ENERGI LISTRIK WILAYAH JAWA-BALI TAHUN 2017-2036 DENGAN GABUNGAN METODE ANALITIS, EKONOMETRI, DAN KECENDERUNGAN Redaksi Tim Jurnal
Energi & Kelistrikan Vol 9 No 2 (2017): Energi & Kelistrikan
Publisher : Sekolah Tinggi Teknik PLN

Electricity is one of the energy required because it can be converted into other energy forms and easier in terms of distribution. Along with the growth of population and economic growth are rising rapidly, demand of power also increases. Therefore, it needs distribution of electric power supply, in terms of technical and economic.In Indonesia, the use of electrical energy per capita is still low compared with the use of electrical energy per capita in other countries. Therefore, it needs to increase the use of electrical energy in order to approach the electrical energy per capita that is ideal with equitable distribution of electrical energy supply. In this study, the growth of electricity demand forecasts using the combined method consisting of analytical methods, econometrics and trends on sectoral approaches. From the results of electricity demand forecasts, from 2017 until 2036 electricity demand will increased 6,4% each year which dominated by household sector in 38,49%, industrial sector 36,62%, commercial sector 19,35%, and public sector 5,54%.To fulfillment the growth in electricity demand, it is necessary to supply additional power.

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