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All Journal Jurnal Rekayasa Mesin Jurnal Sains Materi Indonesia Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan Jurnal Penelitian Pembelajaran Fisika J-ADIMAS (Jurnal Pengabdian kepada Masyarakat) Jambura Journal of Electrical and Electronics Engineering Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran Advance Sustainable Science, Engineering and Technology (ASSET) Automotive Experiences Journal of Materials Exploration and Findings Pelita: Jurnal Pengabdian kepada Masyarakat Widya Teknik
Irna Farikhah
Universitas PGRI Semarang
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Analisa Beban Pendingin Ruangan AC Ruang Auditorium Gedung Pusat Lantai 7 Universitas PGRI Semarang Ramadhani Saputra, Ananta; Spuriyadi, Slamet; Farikhah, Irna
Jurnal Rekayasa Mesin Vol. 25 No. 1 (2025): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v25i1.1379

Abstract

The Auditorium Room on the 7th Floor of the Central Building at Universitas PGRI Semarang is frequently used for various academic and non-academic activities, making cooling load analysis essential to maintain room temperature and humidity comfort. This study aims to determine the cooling capacity required in the auditorium. The methods employed include direct data collection through measurements, such as the number of occupants, electronic equipment, and room dimensions. Cooling loads were calculated by considering sensible and latent loads; sensible loads were measured based on temperature and equipment quantity, while latent loads were calculated based on air humidity. This study identified the total cooling load for the Auditorium Room on the 7th floor of the Central Building at Universitas PGRI Semarang as 115,155.501 Btu/hr. This cooling load consists of 82,381.608 Btu/hr of sensible load and 32,773.893 Btu/hr of latent load. The cooling load includes various factors, such as: Internal loads from occupants, electronic equipment, and lighting. External loads from glass radiation, walls, floors, roofs, and ventilation. The analysis results indicate that the current AC capacity needs to be reassessed to ensure its capability to achieve ideal room temperature and humidity.
Socialization and Training of Solar Power Generation (PLTS) at SD Negeri Tambakharjo Semarang Kusmantoro, Adhi; Farikhah, Irna
Dimas: Jurnal Pemikiran Agama untuk Pemberdayaan Vol. 22 No. 1 (2022)
Publisher : LP2M of Institute for Research and Community Services - UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/dms.2022.221.11949

Abstract

SD Negeri Tambakharjo Semarang uses PLN electricity with low installed power. The school is located in an area that has a total photovoltaic output power and solar radiation intensity of 1,486 Mwh/year and 1953.3 Kwh/m2/year.   The average output power per day of photovoltaic (solar panels) in October and November 2021 was 4551 Wh and 3778 Wh.  Therefore, the purpose of community service is to socialize the use of solar power plants (PLTS) through learning activities (education) and solar pv training for students and school teachers. The methods used in this activity are divided into three stages. In the first stage, field observations were carried out to find problems related to the availability of electrical energy in schools. In the second stage, the implementation of community service includes the delivery of solar panel material with lectures, demos, and solar power plant system designs in schools. In the third stage, it is the stage of evaluation or feedback by providing questionnaires to participants. The results of this service activity provide information data on understanding of solar panels and batteries in the good category. For practical activities, it needs to be improved to be taught for students in grades 5 and 6, so that solar pv props are indispensable in the school.
Simulation of the effect of regenerator porosity on the performance of zero centrigade thermoacoustic cooler generated by the single-stage thermoacoustic machine for sustainable refrigeration Farikhah, Irna; Aldiansyah, Edo Putra; Khoiri, Nur; Ristanto, Sigit; Wibowo, Setyoningsih
Widya Teknik Vol. 23 No. 2 (2024): November-Profesi Insinyur
Publisher : Fakultas Teknik, Universitas Katolik Widya Mandala Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33508/wt.v23i2.6115

Abstract

Refrigeration systems are an essential need in everyday life. There are lots of modern industry that uses refrigerator for helps maintain temperature stability from overheating and prevents the product from drying out protected from dirt and insect attacks. However, the refrigeration system used in industry still uses a refrigeration system vapor compression and using chlorofluorocarbon (CFC) refrigerant and hydro-chlorofluorocarbons (HCFCs) which are harmful to the environment. Therefore, it requires thermoacoustic cooling generated by the engine single-stage thermoacoustic. This research was conducted numerically. In this research, the effects are simulated stack porosity on the performance of thermoacoustic cooling generated by a single-stage thermoacoustic machine at 0°C. the porosity was varied from 0.37 to 0.97. It was found that the stack porosity was optimal when the porosity is 0.97 and the performance of the cooler is 52 %. Moreover, the lowest heating temperature for the thermoacoustic machine is 217°C. This temperature can be used for waste heat recovery. 
Power Flow Regulation of PLTS and Genset in Residential Using PLC Zelio Kusmantoro, Adhi; Farikhah, Irna
Jambura Journal of Electrical and Electronics Engineering Vol 7, No 1 (2025): Januari - Juni 2025
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v7i1.28308

Abstract

At this time many homes are in dire need of a source of electricity. In addition, the electricity source comes from fossil fuels, the availability of which is decreasing. One of the abundant renewable energy sources is solar energy. In the study, it was proposed to regulate PLTS and Genset in residential using PLC Zelio. The purpose of this study is to regulate the power flow to residential loads, so that the power flow to the load is not interrupted. The method used is with the stages of identifying solar irradiation, calculating the load, planning PLTS and designing a power regulator. For PLTS planning, it includes solar panels, batteries, battery charge controller or solar charge controllers, and inverters. The number of solar panels needed is 4 from 250 Wp solar panels. When the battery is used with a lower limit energy of state of change (SOC) of 50%, the number of batteries needed is 8. Based on the calculation, the SCC capacity used is 50 A. The study results show the regulation of energy flow with PLTS and Genset sources on residential loads. In addition, the abundant solar energy sources in the city of Semarang can be utilized for power generation using solar panels.Saat ini, banyak rumah tinggal yang sangat membutuhkan sumber listrik, Selain itu sumber listrik berasal dari energi fosil yang ketersediannya semakin berkurang. Salah satu sumber energi terbarukan yang melimpah adalah energi matahari. Dalam penelitian diusulkan pengaturan PLTS dan genset pada rumah tinggal menggunakan PLC Zelio. Tujuan dalam penelitian ini adalah mengatur aliran daya pada beban rumah tinggal, sehingga aliran daya ke beban tidak terputus. Metode yang digunakan dengan tahapan mengidentifikasi iradiasi matahari, menghitung beban, merencanakan PLTS dan mendesain pengatur daya. Untuk perencanaan PLTS meliputi panel surya, baterai, pengatur pengisian baterai atau solar charge controller, dan inverter. Jumlah panel surya yang dibutuhkan sebanyak 4 buah dari panel surya 250 Wp. Ketika baterai digunakan dengan batas bawah energi atau state of change (SOC) 50% maka jumlah baterai yang dibutuhkan sebanyak 8 buah. Berdasarkan perhitungan terlihat kapasitas SCC yang digunakan sebesar 50 A. Hasil studi memperlihatkan pengaturan aliran energi dengan sumber PLTS dan Genset pada beban rumah tinggal. Selain itu sumber energi matahari yang melimpah di kota Semarang dapat dimanfaatkan untuk pembangkit listrik memakai panel surya.
Pelatihan Majalah Dinding Digital Berbasis Web bagi Komunitas Seni Hysteria Semarang Wardani, Theodora Indriati; Kusmantoro, Adhi; Farikhah, Irna; Purwosetiyono, FX. Didik
Pelita: Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 2 (2024): Pelita: Jurnal Pengabdian kepada Masyarakat
Publisher : Perkumpulan Kualitama Edukatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51651/pjpm.v4i2.511

Abstract

In the city of Semarang along with the development of the city of Semarang as the number five big city in Indonesia, communities have sprung up that have special activities as activities to foster love for the city of Semarang, namely for the future development of the city of Semarang. One of them is the Hysteria community based in Semarang who works for the city of Semarang. Hysteria Community, a community from Semarang. In the management of Hysteria each member of the board has a personal network and that personal network consists of literati, artists, painters, music artists, journalists, art students, choreographers, dance artists, but when their activities have been carried out and information in the form of pictures and writings must be displayed or shown to other people or the public around where they are active or working, They still make wall magazine designs. In the development of the digital technology era requires expertise and skills in the field of communication technology, the wall magazines that are still made by the Hysteria art community are usually still manual or conventional, namely in the form of a collection of wall magazine materials (mading) that are pasted and arranged in such a way on one large sheet of paper of rather thick size, so that the information in the wall magazine (mading) is not widely spread and requires costs, time and energy to make the wall magazine, so there is a waste of costs, so it was thought of how members of the Hysteria art community can independently use the application to disseminate wall magazine information (mading) to convey information on activities using a digital-based internet network in the form of a website to make it more attractive, so it is necessary to carry out a community partnership program, namely holding a web-based digital mading (wall magazine) training using the Google Sites software application without using paper pasted on the wall to reduce waste of cost, time and energy, and accelerate the dissemination of information using internet facilities for the Hysteria art community network spread across the city of Semarang.
Current and Voltage Imbalances at BPTIK Universitas PGRI Semarang Margono, Margono; Amiruddin, Muhammad; Farikhah, Irna
Advance Sustainable Science, Engineering and Technology Vol 3, No 1 (2021): November-April
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v3i1.8385

Abstract

Energy conservation is an effort to increase energy efficiency. This research conducted an energy audit in the BPTIK (Badan Pengembangan Teknologi Informasi dan Komunikasi) department room at the Universitas PGRI Semarang, observing the value of electrical parameters, especially unbalanced voltage and current that have the potential to cause neutral currents. In this study the calculated unbalanced voltage value is 0.64% and unbalanced current is 20.25%. From the current development, the neutral current produces an average of 1.72 Amperes. From the value of the neutral current can be calculated the energy lost in the conductor neutral wire per day is about 0.01% of energy consumption by the load per day
The Potential of Mechanic Vibration for Generating Electric Energy Hakim, Muhammad Afta Dzikril; Amiruddin, Muhammad; Hasto, Ken; Margono, Margono; Harjanto, Imadudin; Carsoni, Carsoni; Farikhah, Irna; Setyoadi, Yuris; Nuroso, Harto; Kaltsum, Ummi
Advance Sustainable Science, Engineering and Technology Vol 2, No 2 (2020): May-October
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v2i2.7054

Abstract

The purpose for this study is to convert mechanical vibration into electrical Power. Our target is to provide enough power for 1.2 V rechargeable battery having 160 . The investigation was conducted experimentally in electrical mechanical engineering laboratory. Four piezoelectric was connected to circuits in series mode called 1 module. In order to recharge the battery having voltage 1.2 volt, the measurement of the intensity of the loudspeaker was verified. According to table 1, it was found that at 2  of vibration is best because the value is 1.4 V nearest to 1.2 V. It was found that the mechanical vibration can be converted into electric power. It was found that to recharge 160  having 1.2 V, the 20 modules are needed.
Co-Authors Aan Burhanudin Adhi Kusmantoro Aldiansyah, Edo Putra Carsoni Carsoni, Carsoni Endang Dian Rokhmawati FX. Didik Purwosetiyono Hakim, Muhammad Afta Dzikril Harto Nuroso Hasto, Ken Imadudin Harjanto Irfan Abd Rahim Joko Siswanto Joko Siswanto Margono Margono Muhammad Amiruddin Muhammad Amiruddin Nur Khoiri Nur Khoiri Nur Khoiri Rahim, Irfan Abd Ramadhani Saputra, Ananta Rina Wijayanti Rokhmawati, Endang Dian Setyoningsih Wibowo Sigit Ristanto Slamet Supriyadi Solly Aryza Spuriyadi, Slamet Sukmawati, Indah Ummi Kaltsum Untung Sucipto Wardani, Theodora Indriati Yuris Setyoadi Yuris Setyoadi Yusril Yusuf