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Eksergi: Jurnal Teknik Energi

eksergi
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Published by Politeknik Negeri Semarang

ISSN : 02168685 EISSN : 25286889 DOI : http://dx.doi.org/10.32497/eksergi.v18i2.3605

Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Energy Engineering Mechanical Engineering

Design of DC Accumulator Charging using Backup Accumulator Based on Inverter and Converter Device Parlindungan Pandapotan Marpaung

Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)

Articles 12 Documents

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Search results for , issue "Vol. 18 No. 2 (2022): MAY 2022" : 12 Documents clear

Design of DC Accumulator Charging using Backup Accumulator Based on Inverter and Converter Device Marpaung, Parlindungan Pandapotan
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

The charging of DC accumulator thatexperiences a lack of electric charge energy, usuallyutilizes an AC input power from the PLN network. Whenthe AC input power from the PLN network is unavailable,a DC power source is used from the backup DCaccumulator as a substitute. The research objective is todesign an internal DC accumulator charging using abackup DC accumulator equipment based on inverterand converter equipment. The charging system will useinput power from the backup DC accumulator to replacethe AC input power from the PLN network. The electricvoltage of the internal DC accumulator that is filled(charged) is the initial condition of VDC(Acu.Int.)= 8.76 Voltsuntil it reaches the normal condition of 12.05 Volts with acapacity of charging current of 5 Ah (Ampere.hours)absorbs electrical energy of W(Acu.Int.) = 16.45 Wh(Watt.hours). The results show that the equipment supplya DC charger of 13.0 volts and PDCof 21.32 watts to theinternal DC accumulator. The comparison of W(Acu.Int.) to PDC produces time charging, t(charging)of 46.29 minutes

Solar Cell Performance Test against Load Variations Sumarno, F Gatot; Wahyono, Wahyono; Mei Hermawan, Baktiyar; Hamim Su”™udy, Ahmad; Fatowil Aulia, Nur; Khoiroh, Ikhwatinah; Surindra, Mochammad Denny
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Solar cell is a converter of light energy into electrical energy. This study aims to examine the characteristics of the solar cell to load variations. The research was conducted at the Semarang State Polytechnic Energy Conversion Lab. The solar cell used in the research of the monocrystalline solar cell type KTENG CP-520S. The research method is carried out by measuring the value of solar intensity, voltage and electric current from the solar cell, then calculating the value of the power and efficiency of the solar cell. The greater the intensity of sunlight, the better the characteristics of the solar cell with a note that the solar cell surface temperature must be stable at 250C. The results showed that the highest input power of the solar cell was 5293.69 watts at a lamp load of 115 watts at 833.6 W/m2 of radiation during sunny weather. The highest value of the output power of the solar cell is 191.52 watts when the lamp is loaded with 190 watts of radiation at 739.4 W/m2 during sunny weather. While the highest value of the load output power is 212.43 watts when the lamp is loaded with 200 watts of radiation at 724.4 W/m2 when the weather is sunny. The highest efficiency of the solar cell is 4.13% when the lamp is loaded with 200 watts of radiation at 724.4 W/m2 when the weather is sunny. And the highest value of Solar Power Plant efficiency is 4.61% at a 200 watt lamp loading at 724.4 W/m2 radiation when the weather is sunny.

Comparison of Injection Characteristics and Droplet Distribution on Crude Palm Oil and Diesel Using CFD Suprianto, Teguh; Darmansyah, Darmansyah; Hasbi, Muhammad
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

CPO (Crude Palm Oil) is a potential renewablefuel as a substitute for fossil fuels used in internal combustionengines. An important parameter that affects the combustion ofan engine with an injection system is the characteristics of thefuel spray. This research was conducted using ComputationalFluid Dynamics (CFD) software to model the atomizationprocess that occurs when CPO and diesel fuel are injected witha pressurized atomizer. The modeling shows the characteristicsof the spray which include the shape of the spray and the dropletdiameter distribution. These characteristics are presented withspray images, droplet diameter distribution graphs, and velocitydistribution graphs. Simulations show that at temperaturesabove 75 °C and 100 °C, CPO spray produces droplet shapes anddistributions that are almost the same as diesel spray. On theother hand, diesel injection spray produces a lower droplet size.The highest droplet size distribution is at 12-16 microns.

Performance of Magneto Hydro Dynamic (MHD) as a Power Generation Support Tool Purwati W, Wiwik; Atmojo, Slamet Priyo; Margana, Margana; Suwarti, Suwarti; Prasetiyo, Budhi; Khoiroh, Ikhwatinah
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Magnetohydrodynamics is a method for generating electricity by utilizing the interaction between a magnetic field and an electrolyte fluid. MHD components: salt water electrolyte, Neodymium N52 magnet, and Cu-Zn electrode. The MHD used is a coarse salt water electrolyte. The purpose of the MHD model is as an innovative technological breakthrough that is used to support increasing the efficiency of the power generation system. The lowest efficiency is shown in the second data with variations in salt content of the 5 grams/liter experiment without MHD support, which is 0.08%. The highest efficiency is shown in the twentieth data with variations in salt content of the 95 gram/liter experiment supported by MHD, which is 0.59%. The maximum efficiency increase that can be achieved is 0.37% with variations in salt content of 60 grams/liter.

Testing the Effect of Variation of Deflector Shapes on the Performance of the Three Blade Vertical Axis Savonius Water Turbine Gunawan, Gad; Susilo, Rizky Dwi; Kurniawati, Diniar Mungil
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Hydropower is energy obtained from flowingwater and can be used for mechanical energy or electricalenergy. Electrical energy is energy that is used to fulfill humanneeds in life. The need for electrical energy in Indonesiacontinues to increase by an average of 3.9% from year to yearuntil 2050. There are various water sources in Kalimantansuch as water ditches, as well as reservoirs that have low-speedwater flow and the capacity to accommodate water levels thatare not too high. The Savonius water turbine can be utilized inthese conditions because it has the advantage of a simpleturbine construction, and is suitable for relatively low velocitywater flows. This study analyzes how well the Savonius waterturbine is by applying different deflector shapes. The methodapplied in this experiment is an experimental study using aSavonius turbine. The conclusion in this study is that applyinga deflector will improve turbine performance much better thannot using a deflector. Experiments by applying deflectors,namely convex deflectors, flat deflectors, and concavedeflectors, it was concluded that the application using aconcave deflector resulted in the highest rotational speedproduced by the turbine, the maximum value of turbine powerand the Savonius turbine coefficient of 206.3 rpm, 0.196 Wattand Cp = 0.124.

Reverse Time During Current Relay Performance to Support the Protection System Practicum Wahyono, Wahyono; sumarno, F. Gatot; W, wiwik Purwati; margana, margana; suwarti, Suwarti; N., Ajie Pribadi
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

””Overcurrent Relay is one of the protection system tools in the electricity network. Overcurrent Relay works based on the increase in fault current that exceeds a certain safety value and a certain period of time. The type of relay that will be used in this test is the IDMT NX203A Overcurrent Relay. The purpose of this test is to get a good practicum module and to prove the inverted time relay characteristic curve according to British Standard BS142. In the test, the tool to be assembled is tested for its work function so that in data collection errors can be avoided while the relay on the module will be given a current setting of 2A; 3A; and 4A with TMS0.05; 0.5; and 1.0 which will be connected to a digital timer so that if the fault current exceeds the setting current, the relay will automatically give a signal and the digital timer will show the time when the current is cut off. The final result is a practicum module where each tool functions under normal working conditions and a graph of time against relay current for setting current 2A, fastest time 0.498s at 9A fault current and 0.05 TMS, longest time 12.991s at 4A TM fault current. . 1.0. Current setting of 3A for the fastest time is 0.572s at fault current of 9A and TM 0.05, for the longest time is 35.854s at fault current of 4A and TM 1.0. Current setting of 4A for the fastest time is 0.708s at fault current of 9A and TM 0.05, for the longest time is 55.979s at fault current of 5A and TM 1.0.

Prototype of Monitoring and Controlling System on Gondola Cage Security Based Android Application Dionova, Brainvendra Widi; Junesco Vresdian, Devan; Ananda Hapsari, Anindya; Budi Priyono, Sigit; Haryudiniarti, Ayu Nurul; Nafiulana Tri, Anggita; Manfaluthy, Mauludy; N. Abdulrazaq, Mohammed
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Gondola is one of the facilities used in high-rise buildings that are used to access the outside of the building. Gondola has a maximum load limit that is safe to transport it. Gondola is also often damaged in the cage caused by collisions on the side of the building. Until now, the gondola control still uses buttons which also often experience problems. This study aims to provide monitoring of the cage load and provide information about the distance of the cage to surrounding objects. Gondola control through an android application also includes this research in order to provide an alternative if the buttons on the gondola control experience problems. The short-term goal of this research is to carry out an innovation in the gondola field by conducting experiments through prototypes. The medium term goal is to apply the results of this research into a gondola. The results of this study control and monitoring can function properly even though the results produced are not yet accurate due to the imperfect quality of components, materials and assembly.

Savonius Turbine Performance Type ”“ S Variation of Rotor Sweep Diameter and Air Gap Margana, Margana; Sumarno, F Gatot; Purwati W, Wiwik; Suwarti, Suwarti; Fakhri Dzulfikar, Hafidh; Ibrahim, Nandhi Lathief; Wahyuningtyas, Saskia; Widya Larassanti, Sri; Naufal Hanif, Daffa”™
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

The savonius wind turbine with variations in the diameter of the sweep and the air gap is a technological innovation with treatment using changes in the diameter of the sweep and the distance of the air gap between the blades. And it has low self-starting and relatively high torque. The purpose of the study was to create five models and test the performance of the Savonius wind turbine with variations in sweep diameters of 500 mm, 480 mm, 460 mm, 440 mm and 420 mm with air gaps of 30 mm, 50 mm, 70 mm, 90 mm, and 110 mm. . And analyze the turbine performance to get the best Coefficient of Power (CP) from the five turbine gaps. The stages of the research method include the preparation of a literature search, turbine design planning, tool making, tool testing, data collection, data analysis, and the final stage. The results of the tests carried out showed that the Savonius turbine with an air gap of 70 mm with a CP value of 0.232 had maximum work at low wind speeds (4 m/s) and at high wind speeds (10 m/s). obtained a CP value of 0.0695

Feasibility Study of Performance Low Capacity Hybrid Energy Power Plant System in Remote Area Samsurizal, Samsurizal; Azis, Hastuti; Azzahra, Septiannissa; Martiningsih, Wahyuni
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

The fossil energy utilization for electricitygeneration is currently starting to be limited because it is predictedthat the availability of fossil energy for the next few decades willrun out. Renewable energy is an alternative energy that can beused to generate electricity. Solar power plant is one of theelectrical energy generators with renewable energy sources thathave been widely used. Solar power plant is a DistributedGenerator that can be applied directly to consumers and it is verysuitable for use in remote areas which currently still use diesel asa fuel for power generation. In this research, the design of a hybridpower generation system between Soalr Energy and Wind will becarried out to replace the use of diesel as a source of electricitygeneration. After the generator design is done, then theperformance test of the hybrid system will be carried out in orderto see the feasibility of the design that has been made. From thetest results, the results of the Hybrid Energy Generator haveefficiencies ranging from 10-12% where this shows that the powerplant system is still said to be unable to work efficiently. Theaverage amount of energy produced from this Hybrid PLT systemis 1,304 kWh per day. Based on the results of the economicfeasibility analysis, that the use of the hybrid system is able toproduce savings of Rp. 1,700 ”“ Rp. 2,100/kWh per day

Analysis of Solar Cell Utilization as an Automated Pump Driver in a Fishpond Suwarti, Suwarti; DH, Yusuf; Prasetyo, Budhi; Margana, Margana; Hamim Su'udy, Ahmad; W, Wiwik Purwati; Supriyo, Supriyo
Eksergi Vol. 18 No. 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

The purpose of making this final task is to apply the solar power system as a source of electrical energy to move the water pump automatically in fish ponds. This system works automatically with the Water Level Control tool sensor (WLC), so that if the water level drops or rises then the water pump will automatically work. On this automated system use the Smart Relay SR2B121BD and the ZelioSoft 2 application. Data retrieval carried out at 10.00 -14.00 WIB, obtained data pumps 1 and 2 for a height of 1 cm for 30 minutes and a height of 2 cm for 70 minutes. The amount of discharge the pump produces 1 and 2 ranges from 37 L/M to 45 L/M. Pump 1 Test results obtained an average efficiency of 7.68%, with the highest efficiency of 11.03% and the lowest efficiency of 5.26%, while the average pump efficiency of 2, 7.05% with the highest efficiency of 10.66% and the lowest efficiency of 5.41%. The average efficiency of the solar panels is 11.20% with the highest efficiency of 14.60% and the lowest efficiency of 7.29%

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Parlindungan Pandapotan Marpaung

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eksergi.polines@gmail.com

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Program Studi Teknik Konversi Energi Jurusan Teknik Mesin Politeknik Negeri Semarang Jalan. Prof. H. Soedarto, S.H., Tembalang, Semarang.

Location
Kota semarang,

Jawa tengah

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Parlindungan Pandapotan Marpaung

Contact Email parlindungan.reni@gmail.com

Phone +6285259948993

Journal Mail Official eksergi.polines@gmail.com

Editorial Address Program Studi Teknik Konversi Energi Jurusan Teknik Mesin Politeknik Negeri Semarang Jalan. Prof. H. Soedarto, S.H., Tembalang, Semarang.

Location Kota semarang, Jawa tengah INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Parlindungan Pandapotan Marpaung

Contact Email
parlindungan.reni@gmail.com

Phone
+6285259948993

Journal Mail Official
eksergi.polines@gmail.com

Editorial Address
Program Studi Teknik Konversi Energi Jurusan Teknik Mesin Politeknik Negeri Semarang Jalan. Prof. H. Soedarto, S.H., Tembalang, Semarang.

Location
Kota semarang,

Jawa tengah

INDONESIA