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All Journal Jurnal Sains dan Teknologi Gemawisata: Jurnal Ilmiah Pariwisata Proceeding Seminar LPPM UMP Tahun 2014 Profesi Pendidikan Dasar Jurnal Rekayasa Mesin JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Kultivasi PeTeKa Jurnal PTK dan Pendidikan Jambura Journal of Community Empowerment Psychosophia: Journal of Psychology, religion, and humanity Kepariwisataan: Jurnal Ilmiah Jurnal Kajian Ilmiah Community Empowerment Journal of Industrial Engineering & Management Research (JIEMAR) Indo-MathEdu Intellectuals Journal Jurnal Ilmu Manajemen, Ekonomi dan Kewirausahaan Eksergi: Jurnal Teknik Energi Jurnal Ekonomi, Manajemen Pariwisata dan Perhotelan Jurnal Psikologi Insight Jurnal Pengabdian Masyarakat Waradin Sewagati: Jurnal Pengabdian Masyarakat Indonesia Nawasena: Jurnal Ilmiah Pariwisata Jurnal Pengabdian Masyarakat Bangsa PSIMPHONI Bookchapter Alam Universitas Negeri Semarang Waspada : Jurnal Wawasan Pengembangan Pendidikan Journal of Community Empowerment Jurnal Sosialita: Jurnal Kajian Sosial dan Pendidikan
Suwarti Suwarti
Fakultas Psikologi - Universitas Muhammadiyah Purwokerto
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Energy Audit of Flouresen Lights at School Building C III Floor Politeknik Negeri Semarang Supriyo, Supriyo; Margana, Margana; W, Wiwik Purwati; 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.
Monitoring of iot-based Wind and Solar Hybrid Power Plants for Agricultural Irrigation Systems Prasetiyo, Budhi; Widyaningsih, Wiwik Purwati; H, Yusuf Dewantoro; Suwarti, Suwarti
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.v18i3.3892

Abstract

The use of renewable energy, one of which is Hybrid Power Plants   (PLTH). The PLTH used in this study is a wind and solar power plant. To keep the plant from being damaged and prevent a decrease in tool performance, PLTH was developed based on the Internet of Things (IoT).   IoT will later monitor the performance of the plant.   In this study using the ESP32 TTGO SIM800L microcontroller, the sensors used were DC voltage sensors, current sensors (ACS712), wind speed sensors (anemometers), wind direction sensors (wind vanes), and water flow sensors.   The research began with designing the relationship between components, working on monitoring and programming systems on software, installing outdoor sensors and installing monitoring systems, and ending with data observations.   The results   obtained on the observation of data, the best error percentage values   are presented by various sensors with values less than 6%.
Dual Axis Solar Tracker System Application Based on Arduino Atmega 2560 and Internet of Things (iot) for Submersible Pump Operation Wahyono, Wahyono; Suwarti, Suwarti; H, Yusuf Dewantoro; Citraningtyas, Dita Putri; Ardiansyah, Muhammad Ridho; Cahyani, Regita Fitri; Prihartini, Retno; Pangestu, Wisnu
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.v18i3.3910

Abstract

Most of the Solar Power Plants (PLTS) still use a static system which is considered less effective in absorbing solar energy. This is due to the earth's rotation which causes the sun to not always be in the same position. In order to optimize the absorption of solar energy so that the power produced is stable and maximum, a tracking system is applied to the solar panels. This tool works by using 4 LDR sensors and 2 DC Power Window motors as the driving force and the presence of Wi-Fi as a communication medium between the Arduino ATmega 2560 and the Android application so that the performance of the solar tracker can be monitored via a smartphone in real time. The purpose of this research is to optimize the efficiency of solar panels. The method used in this research is Research and Development (R&D). The test was carried out with the Dual Axis Solar Tracker system against a load in the form of a submersible pump. The test results show the average efficiency of the Dual Axis Solar Tracker system is 20.89% with an average power output of 84.81%.
Analysis of The Utilization of Solar Panels as Pump Crusters Automatically in Fish Pond Farming Suwarti, Suwarti; H, Yusuf Dewantoro; Su'udy, Ahmad Hamim; Prasetyo, Budhi; Margana, Margana; W, Wiwik Purwati; Supriyo, Supriyo
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.v19i01.4246

Abstract

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%.  
Study of solar power plants as an aerator driver based on the Internet of Things (IoT) Margana, Margana; Wahyono, Wahyono; Hermawan, Baktiyar Mei; W, Wiwik Purwati; Suwarti, Suwarti; Aulia, Nur Fatowil; Solikhin, Akhmad Riadzus
Eksergi Vol. 19 No. 2 (2023): MAY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i2.4479

Abstract

The use of solar power plants is now developing, for example aerator drives with the Internet of Things. The purpose of designing aerators with the Internet of Things is to utilize programming instructions that each command can generate interaction with fellow devices and connect automatically without user intervention, even remotely. This research method begins with the study of literature, manufacture, installation of components, as an analysis carried out testing and data collection. The results of the tests conducted on day 5 include, the best solar radiation intensity power of 886.786 W/m2, the power produced by solar cells of 473.099 W and aerator power of 75.843 W, solar panel efficiency of 14.749%. and PLTS system efficiency of 4.275%. In this test, it was found that the addition of aeration can increase oxygen concentration and pH value of water.                                                                Keywords- Aerator, PLTS, Performance      
Analysis Of Solar Power Plants With A Capacity Of 100 Wp With Automatic Transfer Switch In The Energy Conversion Laboratory Of Semarang State Polytechnic Suwarti, Suwarti; Aulia, Nur Fatowil; Wahyono, Wahyono; Prasetyo, Budhi; Hendrawati, Dwiana; Hermawan, Baktiyar Mei
Eksergi Vol. 20 No. 02 (2024): MAY 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v20i02.5807

Abstract

Solar energy is one of the renewable energy sourcesby utilizing the sun as its energy source. The planning of thePLTS uses an on-grid system, the system is still connected tothe PLN network. The system is used as a backup forelectricity flow. The system will work automatically when thePLN electricity flow is cut off by utilizing the AutomaticTransfer Switch (ATS) control system. The PLTS was tested bymeasuring the voltage, current, and input and output powerfor 5 days from 09.00-15.00 WIB with data collection every 60minutes. Then calculations were made to determine theefficiency of the PLTS. Calculations were also made of theenergy produced by the panels needed and produced by thelights ideally and actually. The results of the DC voltage andDC current tests on average at a load of 70 Watts produced bythe solar panel were 12.7 V and 2.41 A with a data collectionperiod of 7 hours, producing energy of 214.3 Wh andproducing the highest efficiency of 7.9% and the lowest 4.84%.
Co-Authors Abdillah, M.L. Abdul Fattah Ade Galang Saputra Adiba, Azka Fikral Agustini, Ferina Ahmad Hamim Su’udy Alfi Laila, Alfi Aminuyati An Nizhami, Avicenna Aries Tika Damayani Aries Tika Damayani, Aries Tika Atmojo, Slamet Priyo Aulia, Nur Fatowil Aurilia Triani Aryaningtyas Bono Bono Budhi Prasetiyo Budhi Prasetyo Cahyani, Regita Fitri Citraningtyas, Dita Putri DEWI SARTIAMI Dewi, Syavira Berliana Syaskia DH, Yusuf Dwiana Hendrawati Dyah Rini Indriyanti Elhas, Rivan Ma’rivan Erwin Putera Permana F Gatot Sumarno, F Gatot F. Gatot Sumarno, F. Gatot Fakhri Dzulfikar, Hafidh Gatot Suwoto Ghoni, Fathi Abdul H, Yusuf Dewantoro Hakim, Jihan Hamim Su'udy, Ahmad Hani Krisnawati Hartanto, Jimmy Herawati Herawati Herdian, Herdian Hermawan, Baktiyar Mei Heryanto, Rubi Ibrahim, Nandhi Lathief Idah Kusuma Dewi Imam Faisal Hamzah Inke Pratiwi, Inke Irawan, Muhammad Raynaldi Akbar Putra Isworo, Diantri Nurjati JANNAH, MIFTAKUL Khoiroh, Ikhwatinah Labibah, V.R. Lahan Adi Purwanto Margana Margana MIFTAKHUROHMAH MIFTAKHUROHMAH, MIFTAKHUROHMAH Mildaeni, Itsna Nurahma Mildaeni, Itsna Nurrahma Mochammad Denny Surindra Muhammad Azrai, Muhammad Mulyono Mulyono N., Ajie Pribadi Nanang Apriandi Nani Nasikhatun, Ikhda Naufal Hanif, Daffa”™ Na’imah, Tri Nina Mistriani Nining Nurini Andayani, Nining Nurini Noveni, Nia Anggri Nur'aeni, Nur'aeni Padang Yanuar Pangestu, Wisnu Prihartini, Retno Priyantini Widiyaningrum Priyanto, Slamet Bambang Purwasih, wahyu Purwati W, Wiwik Putri, Amelia Lufitta Putriningsih, Tiara Sanika Langsa R, Rizky Amelia Rahmah Maulida Rahman, Ayyub Ar Rani Raharjanti Ray Octafian Retno Dwiyanti Rizky Esti Utami, Rizky Esti Rohimatun Rohimatun, Rohimatun Roro Setyawati, Roro Rr. Setyawati Salsabila, Aulia Muti’ah SETYOWATI RETNO DJIWANTI, SETYOWATI RETNO Siti Hardiyanti Siti Sarah, Siti Slamet Priyoatmojo, Slamet Solichoel, Solichoel Solikhin, Akhmad Riadzus Sri Ngabekti Stiawan, Dani Sugiyanto, Estia Supriyo Supriyo Sutanto, Bayu Timotius Anggit Kristiawan Titik Minggarwati, Titik Tito Pinandita Trenggono, Trenggono Tri Lestari Mardiningsih, Tri Lestari Ugung Dwi Aryo Wibowo, Ugung Dwi Veryliana Purnamasari, Veryliana W, wiwik Purwati Wahidah, Fatin Rohmah Nur Wahyono Wahyono Wahyuningtyas, Saskia Widi Amaria Widya Larassanti, Sri Wiwik Purwati Widyaningsih Wuntu, Gana Wuri Noro Gurnita, Wuri Noro Yusuf Dewantoro Herlambang Z. Imam, Wahda