cover
Article Per Year (5 Year)
All
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
Eksergi: Jurnal Teknik Energi
Published by Politeknik Negeri Semarang
ISSN : 02168685     EISSN : 25286889     DOI : http://dx.doi.org/10.32497/eksergi.v18i2.3605
Core Subject : Science, Engineering,
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 220 Documents
 17   18   19   20   21 
Prototype of Monitoring and Controlling System on Gondola Cage Security Based Android Application Brainvendra Widi Dionova; Devan Junesco Vresdian; Anindya Ananda Hapsari; Sigit Budi Priyono; Ayu Nurul Haryudiniarti; Anggita Nafiulana Tri; Mauludy Manfaluthy; Mohammed N. Abdulrazaq
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.978 KB) | DOI: 10.32497/eksergi.v18i2.3498

Abstract

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; F Gatot Sumarno; Wiwik Purwati W; Suwarti Suwarti; Hafidh Fakhri Dzulfikar; Nandhi Lathief Ibrahim; Saskia Wahyuningtyas; Sri Widya Larassanti; Daffa’ Naufal Hanif
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (738.794 KB) | DOI: 10.32497/eksergi.v18i2.3582

Abstract

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; Hastuti Azis; Septiannissa Azzahra; Wahyuni Martiningsih
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.408 KB) | DOI: 10.32497/eksergi.v18i2.3539

Abstract

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; Yusuf DH; Budhi Prasetyo; Margana Margana; Ahmad Hamim Su'udy; Wiwik Purwati W; Supriyo Supriyo
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (875.774 KB) | DOI: 10.32497/eksergi.v18i2.3583

Abstract

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%
Numerical Study of Non-Premixed Combustion Characteristics on Supplementary Firing of HRSG Teguh Hady Ariwibowo; Arrad Ghani Safitra; Muhammad Haidar Fakr; Muhammad Aghist Fitrony
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (724.707 KB) | DOI: 10.32497/eksergi.v18i2.3546

Abstract

Computational fluid dynamics (CFD) is a simulation model to provide complex processes in the industry that has been widely used to investigate industrial-scale combustion phenomena. Supplementary firing is used to increase steam production. The non-premixed combustion is a type of supplementary firing. Supplementary firing has seven burners arranged vertically. Supplementary firing uses exhaust steam from a gas turbine to ignite the air. This research investigates the combustion characteristics of flame length and exhaust gas emission at burners. The viscous model was observed by using non-premixed modeling. While the absorption of radiation in the combustion residual gas was observed by using the weight sum-gray gases model (WSGGM). This study used the realizable k-ε model and tetrahedron meshing algorithm to approach the turbulent characteristics. The total nodes and the orthogonal mesh quality in the meshing steps are 1,334,359 and 0.86, respectively. The modeling results show that burners-1 and 7 have longer flame compared to other burners. The combustion exhaust gas has height contents of CO2 and H2O. The velocity near the furnace wall is lower than the center of the furnace, but the pressure is higher. This phenomenon is dominantly influenced by the thermal boundary layer.
FRONT MATTER EKSERGI JURNAL TEKNIK ENERGI BAKTIYAR MEI HERMAWAN
Eksergi Vol 18, No 2 (2022): MAY 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (718.566 KB) | DOI: 10.32497/eksergi.v18i2.3631

Abstract

FRONT MATTER EKSERGI JURNAL TEKNIK ENERGI
FRONT MATTER EKSERGI JURNAL TEKNIK ENERGI EKSERGI EKSERGI
Eksergi Vol 18, No 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3927

Abstract

FRONT MATTER EKSERGI JURNAL TEKNIK ENERGI
Biogas Desulfurization Using Iron Gram Waste Machining Practicum Process at The Department of Mechanical Engineering, Politeknik Negeri Semarang Nanang Apriandi; Wiwik Purwati Widyaningsih; Margana Margana; Mochamad Denny Surindra; Supriyo Supriyo; Nadia Tasya Ayu Luthfiana
Eksergi Vol 18, No 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3785

Abstract

The important matter about biogas as an alternative energy source was the presence of hydrogen sulfide (H2S) which is very corrosive. The biogas desulfurization process was absolutely necessary to reduce the risk of damage to the equipment. For small-scale applications, the selection of the type of adsorbent became important to reduce additional costs. One alternative material that can be used was iron gram waste. The aim of this study was to investigate the use of iron gram waste resulting from the machining practicum process at the Department of Mechanical Engineering, Politeknik Negeri Semarang as an alternative material for making adsorbents. Iron gram waste was processed into Iron (III) Oxide (Fe2O3) and Iron (III) Hydroxide (Fe(OH)3), formed into billets with an average billet mass of 250 gr. The performance test of the adsorbent in the biogas desulfurization process was carried out under conditions of variation in the flow rate of biogas feed 1, 2, and 3 liters per minute, and the volume of biogas purified in one process was 50 liters. As a result, the most optimum performance was obtained in the test with a feed biogas flow rate of 1 liter/minute, with a percentage reduction in H2S levels contained in the biogas by an average of 82,56%.
Transformer Oil Quality Monitoring Towards Degradation of Insulation Breakdown Voltage Lalak Tarbiyatun Nasyin Maleiva; Melly Mulya Ningsih; Eka Kusumawardhani; Leonardus Sandy Ade Putra; Putranty Widha Nugraheni
Eksergi Vol 18, No 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3738

Abstract

The transformer is one of the critical pieces of equipment for distributing electrical energy from the generator connected to the transmission to the consumer of Diesel and Gas Power Generation Service Units (ULPLTD/G). Therefore, the existence of insulation is essential due to its function as a separator among the transformer core and as a transformer cooler to minimize the heat that arises in the transformer. Hence, the objective of this research was to evaluate the transformer oil quality. The procedure was executed by observing the transformer and collecting data directly from the diesel machine of SWD 2, SWD 3, and SLZ 5. The results revealed that the breakdown voltage of transformer oil categorized as good was SLZ 5 oil with an average of 59,983, and the less good was SWD 2 oil with an average of 34.516. Furthermore, by observing the test results for new and used transformer oil, the breakdown voltage value for new transformer oil was always higher than used oil. Eventually, the transformer efficiency achieved was 95.58%.
Energy Audit of Flouresen Lights at School Building C III Floor Politeknik Negeri Semarang Supriyo Supriyo; Margana Margana; Wiwik Purwati W; Suwarti Suwarti; Mulyono Mulyono
Eksergi Vol 18, No 3 (2022): SEPTEMBER 2022
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v18i3.3890

Abstract

Energy audit is very necessary to calculate the level of energy consumption of a building or buildings. The research includes the amount of energy consumption based on the initial energy audit and detailed energy audit as well as saving opportunities based on conditions in the field. Based on the initial energy audit, the value of the Energy Consumption Intensity (IKE) is 0.699 kWH/m2month, while in the detailed audit the IKE value is 0.935 kWH/m2month. Based on the results of a detailed energy audit, the lighting measurement of 325 lux still meets the requirements for a classroom with a standard between 250 lux to 500 lux.

Page 19 of 22 | Total Record : 220

 17   18   19   20   21 

Filter by Year

2013 2023


Reset
Filter By Issues
All Issue Vol 19, No 01 (2023): JANUARY 2023 Vol 19, No 2 (2023): MAY 2023 Vol 18, No 3 (2022): SEPTEMBER 2022 Vol 18, No 2 (2022): MAY 2022 Vol 18, No 1 (2022): JANUARI 2022 Vol 17, No 3 (2021): SEPTEMBER 2021 Vol 17, No 2 (2021): MEI 2021 Vol 17, No 1 (2021): JANUARI 2021 Vol 16, No 3 (2020): SEPTEMBER 2020 Vol 16, No 2 (2020): MEI 2020 Vol 16, No 1 (2020): JANUARI 2020 Vol 15, No 3 (2019): SEPTEMBER 2019 Vol 15, No 2 (2019): MEI 2019 Vol 15, No 1 (2019): JANUARI 2019 Vol 14, No 3 (2018): SEPTEMBER 2018 Vol 14, No 2 (2018): MEI 2018 Vol 14, No 1 (2018): JANUARI 2018 Vol 13, No 3 (2017): SEPTEMBER 2017 Vol 13, No 2 (2017): MEI 2017 Vol 13, No 1 (2017): JANUARI 2017 Vol 12, No 3 (2016): SEPTEMBER 2016 Vol 12, No 2 (2016): MEI 2016 Vol 12, No 1 (2016): JANUARI 2016 Vol 11, No 3 (2015): SEPTEMBER 2015 Vol 11, No 2 (2015): MEI 2015 Vol 11, No 1 (2015): JANUARI 2015 Vol 10, No 3 (2014): SEPTEMBER 2014 Vol 10, No 2 (2014): MEI 2014 Vol 10, No 1 (2014): Januari 2014 Vol 9, No 1 (2013): Januari 2013 Vol 9, No 3 (2013): SEPTEMBER 2013 Vol 9, No 2 (2013): Mei 2013 More Issue