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Program Studi Teknik Konversi Energi Jurusan Teknik Mesin Politeknik Negeri Semarang Jalan. Prof. H. Soedarto, S.H., Tembalang, Semarang.
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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 256 Documents
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Analysis of the Utilization of Organic Waste into Biogas Alternative Rahmat, Firdaus Nur; Sudarti, Sudarti; Yushardi, Yushardi
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4043

Abstract

Abstract”” Waste is the main problem experienced by somepeople in Indonesia. The population is getting higher in the spanof a year. Unable with the presence of waste consisting of varioustypes of waste, this problem can be felt, namely negative impactson the surrounding environment, for example the slumenvironment, becoming a source of disease nests, and being atrigger for global warming caused by waste. This study has theaim of analyzing the use of the type of organic waste used foralternative energy, namely Biogas. In this study, we used aliterature review approach. An approach similar to the one usedhere is used to collect various data from previously conductedresearch on topics related to those being discussed here. Animalwaste, fruit and vegetable waste, and other forms of organicwaste can be converted into biogas faster than inorganic waste.For the production of biogas, mixing vegetables together isbetter than cutting them. Biogas that has been processed can beused as alternative energy that can benefit various sectors. Theuse of organic waste into biogas can reduce the problem of wastein Indonesia.  
Performance Characteristics of Savonius Wind Turbines With Variations Air Gaps in Supporting the Development of Renewable Energy Hermawan, Baktiyar Mei; Sumarno, F. Gatot; Prasetyo, Totok; Sahid, Sahid; Roihatin, Anis; Aulia, Nur Fatowil; Surindra, M. Denny; Mulyono, Mulyono; Sofiani, Gizella; Putri, Tania Prameswari; Ariyanto, Wahyu
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4252

Abstract

To overcome the occurrence of an energy crisis in the future, an innovation / invention of energy that is environmentally friendly and energy sources will not run out in the future. Energy sources that are environmentally friendly and their potential when developed is very large, one of which is energy sources derived from wind energy. This study aims to determine the effect of wind speed on the performance of wind turbines. To find out the performance characteristics of wind turbines with variations in air gaps. The research method begins with the design / design of the wind turbine, then continues the manufacturing stage, the assembling and installation stage, the testing of tools and analysis, the tests carried out include testing the performance characteristics of the wind turbine. The parameters measured in this study are rotation, torque as well as calculating the kinetic power produced, TSR and CP. The test results conducted showed that the 200 mm air gap Savonius wind turbine with a value of CP = 0.02480-0.15658 had optimum work at low wind speeds (4 m / s). Meanwhile, the 170 mm airborne Savonius wind turbine with a value of CP = 0.00593-0.14668 has optimum work at high wind speeds (8 m / s to 9 m / s). Keywords- wind turbine savonius, air gap, coefficent of power.
Solar Cell Outdoor Bench Design In Open Public Space For Gadged Charging Station Hamid, Abdul; Yusuf, Muhammad; Setyarini, Rianti; Primayanda, Eritrian Bisma; Muna, Naila Sa'adatil
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4134

Abstract

Abstract””The increase in electrical energy is increasing along with the needs of rapidly developing technology. However electricity technology also produces negative impacts such as air and noise pollution caused by power plants. Electrical energy generation is still mostly generated from fossil fuels. A solution that can overcome this problem is to switch to more environmentally friendly electricity technology, such as solar panels. This solar powet plant can be used as an option as a charging energy source in a smart furniture. This research aims to make Solar Cell Powered Outdoor Charging Bench technology.   This bench has several important components, namely: Solar Panel, Solar Charging Controller (SSC), inverter, and battery. This Outdoor Bench is placed in an open place such as a park, Public Open Space and so on which will be used as a charging place for cellphones or laptops. The way this bench works starts with the absorption of solar heat by solar panels on the roof of the bench which is converted into low-voltage electrical energy, then this energy is stored in a dry battery (battery) through SSC, low-voltage electricity is converted through an inverter, and this inverter channels electricity to the socket, so that the charging bench can be used properly.
Optimizing Three Power Plants”™ Output Power Using Firefly Method Safarudin, Yanuar Mahfudz; Mariani, Dina
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.3907

Abstract

Continuing the previous article that use merit order, the simplest method in economic dispatch, this article pursue to optimize the output of three power plants using more advanced algorithm, the firefly. The plants used are similar to the previous paper which are three generators used to supply a load of 975 MW. Simulation is used by taking into account losses. The results show that in spite of having higher losses, firefly algorithm managed to calculate a better result than merit orders did by 0,15%.  
Analysis of Hybrid System in the Photovoltaic and Photothermal Technology Sutanto, Bayu; Munawwaroh, Dita Anies; Bono, Bono; Herlambang, Yusuf Dewantoro; Sumarno, F Gatot; Alfauzi, Abdul Syukur
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4191

Abstract

The utilisation and optimisation of solar energy have a vital role in reducing the global need for conventional fossil energy. Moreover, it is also clean and eco-environmentally energy resources. The photovoltaic-thermal (PV-T) hybrid system that combines photovoltaic and photothermal technology is an ideal solution for creating high-efficiency energy conversion devices. In addition, this system can be constructed to be small and compact with a higher economic value than the conventional technology from the previous solar energy harvesters. This paper will review the PV-T hybrid system and provide the thermodynamic analysis and the feasibility study.
FRONT MATTER EKSERGI JURNAL TEKNIK ENERGI Eksergi, Eksergi
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4278

Abstract

The Newton Model for Seaweed Drying: An Investigation of a Cabinet Dryer Using Biomass Energy Zulhan Widya Baskara; Apriandi, Nanang; Herlambang, Yusuf Dewantoro; Khoryanton, Ampala; Safarudin, Yanuar Mahfudz; Widya Baskara, Zulhan; Raharjanti, Rani
Eksergi Vol. 19 No. 01 (2023): JANUARY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i01.4211

Abstract

This study investigates the viability of employing a cabinet-type dryer with a heat energy source derived from biomass combustion to dry Eucheuma sp. using Newton's model. In this investigation, seaweed was dried with air at a temperature of 55 °C. A reduction in water content of 8.1% was attained after six hours of drying. To make the data fit the suggested drying mathematical model, the data were examined and recorded. The model feasibility test shows that, with a coefficient of determination (R2) that is close to one and corrected at 0.9502, the Newton model can be used to predict the moisture content of dried seaweed after the drying process using a cabinet-type dryer with a source of heat energy from biomass combustion.
EVALUASI KINERJA POMPA SENTRIFUGAL PADA SISTEM THERMAL OIL DI INDUSTRI PENGOLAHAN MAKANAN MENGGUNAKAN SOFTWARE PSAT Aulia, Nur Fatowil
Eksergi Vol. 17 No. 3 (2021): SEPTEMBER 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v17i3.4389

Abstract

Pompa merupakan mesin yang digunakan untuk memindahkan fluida. Penelitian inidilakukan pada unit pompa yang ada di salah satu industry makanan, digunakan uuntukmemindahkan fluida berjenis thermal oil yang temperaturnya mencapai 300C. Penelitiandilakukan untuk mengetahui kinerja dari pompa sentrifugal dengan menggunakan dataoperasi yang ditinjau dari daya pompa, Head Pompa, Headloss mayor, minor, dan daya fluidayang dikorelasikan dengan software PSAT. Hasil menunjukkan bahwa perhitungan manualdidapatkan Head total sebesar 65,43 m dengan head loss total sebesar 11,86 m dan effisiensisebesar 82%. Hasil perhitungan PSAT menunjukan effisiensi optimal pompa sebesar 87,5%dan effisiensi exsisting sebesar 85,6% yang artinya memiliki perbedaan sebesar 4% - 7% dariperhitungan manual. Hal ini bisa disebabkan karena software tidak memperhitungkanbeberapa faktor seperti head loss
Karakteristik Turbin Savonius Dengan Variasi Sudut Su'udy, Ahmad Hamim
Eksergi Vol. 17 No. 3 (2021): SEPTEMBER 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v17i3.4381

Abstract

Energi angin merupakan salah satu energi yang dapat diubah menjadi energi listrik menggunakan turbin angin. Berdasarkan sumbu putarnya turbin angin terdiri dari dua macam yaitu turbin angin sumbu horisontal dan turbin angin sumbu vertikal. Turbin angin dengan sumbu vertikal mempunyai beberapa jenis diantaranya turbin angin Darrieus, turbin angin Savonius, dan turbin angin H. Tujuan dari pembuatan dan pengujian ini adalah untuk mengetahui pengaruh kecepatan angin dan efisiensi sistem dari turbin angin Savonius blade dengan variasi sudut serang pada kecepatan angin tertentu. Berdasarkan hasil pengujian dapat diketahui nilai daya generator tertinggi kecepatan angin 6 m/s didapatkan sebesar 3,85 Watt pada sudut serang 20 ° dan beban 1 lampu DC, pada kecepatan angin 7 m/s didapatkan nilai daya generator tertinggi sebesar 5,58 Watt pada sudut serang 0 ° dan beban 3 lampu DC, sedangkan nilai daya generator tertinggi pada kecepatan angin 8 m/s didapatkan sebesar 8,52 Watt pada sudut serang 5 ° dan beban 4 lampu DC. Nilai daya generator berbanding lurus dengan putaran turbin. Semakin besar Putaran turbin maka daya generator yang dihasilkan juga semakin besar.
INSPEKSI PERFORMA LAMPU SIKLON NEW REVOLED SRN90-AC-ST/AD DAN SRN120-AC-ST/AD Slamet Priyoatmojo
Eksergi Vol 14, No 3 (2018): SEPTEMBER 2018
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v14i3.4422

Abstract

Pada artikel ini akan dibahas mengenai hasil pengujian dari dua buah lampu LED 90W dan 120W yang akandipasang pada salah satu kabupaten di Jawa Tengah. Kedua lampu tersebut yang dianalisa pada artikel ini akandiuji melalui metode variasi tegangan input dan pengujian karakteristik starting. Hasil dari penguijian tersebutnantinya akan dibandingkan dengan standar yang berlaku dan data spesifikasi dari kedua lampu. Daripengamatan didapatkan hasil bahwa kedua lampu tersebut dapat bekerja sesuai dengan spesifikasi, yaitu padategangan 120 V hingga 250 V tanpa mengurangi daya lampu secara signifikan. Kemudian lampu juga dilengkapidengan soft starting sesuai dengan spesifikasinya. Lampu baru secara bertahap akan menaikkan dayanya, danmenyala pada daya maksimal setelah menit ke-30 hingga 50.

Page 21 of 26 | Total Record : 256

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