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Harvesting Cooling Effect on LPG-Fueled Vehicles for Mini Cooler: A Lab-Scale Investigation Setiyo, Muji; Widodo, Noto; Purnomo, Bagiyo Condro; Munahar, Suroto; Rahmawan, Muhammad Andi; Luthfi, Akbar
Indonesian Journal of Science and Technology Vol 4, No 1 (2019): IJOST: VOLUME 4, ISSUE 1, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i1.12834

Abstract

This article presents an investigation of the actual cooling effect on a lab-scale prototype of LPG-fueled vehicles. The cooling effect is obtained from heat absorption by LPG on the vaporizer. Water with a mass flow rate of 1, 2 and 3 lpm is flowed from the cooling box to the LPG evaporator and flow back to the cooling box. The car used in this study has a capacity of 1500 cc that rotates 1000, 1500, and 2000 rpm. The results showed that there was a relationship between cooling power with the increase in engine speed and mass flow rate of water that crosses the evaporator. The biggest cooling power is 378 Watts at 1000 rpm with a water mass flow rate of 3 lpm.
Pengaruh Tekanan Kompresi Terhadap Daya dan Torsi Pada Engine Single Piston Purnomo, Bagiyo Condro; Munahar, Suroto
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 1, No 1 (2019): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.010103

Abstract

LPG is an alternative fuel as fuel oil (BBM) which has a higher octane and energy value compared to BBM, and produces lower exhaust emissions. However, engine performance has decreased. This research presents an analysis of the performance of a single piston 4-stroke LPG engine with changes in compression pressure. Tests were carried out to determine the power and torque with variable pressure compression of  9 bar, 9.5 bar and 10 bar. The test results show that a single piston 4-stroke LPG engine with 9 Bar compression pressure produces a maximum torque of  9.77 Nm at 3380 rpm and a maximum power of 6.7 HP at 5870 rpm. Whereas the 10 Bar compression pressure produces a maximum torque value of 10.79 Nm at 3689 rpm and a maximum power of 6.9 hp at 5936 rpm. The conclusion of this research is that the higher the engine compression pressure, the higher the thermal efficiency in the combustion chamber so that engine performance increases
IMPLEMENTASI PEMANFAATAN ENERGI TERBUANG UNTUK KELOMPOK WANITA TANI PEMBUAT GULA SEMUT DI KECAMATAN CANDIMULYO KABUPATEN MAGELANG Waluyo, Budi; Purnomo, Bagiyo Condro
Community Empowerment Vol 2 No 2 (2017)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.686 KB)

Abstract

Sebagian masyarakat di Kecamatan Candimulyo merupakan pengrajin gula kelapa, bahkan pekerjaan yang dilakoni hingga turun temurun. Permasalahan yang dihadapi mitra adalah mitra tidak bisa memproduksi gula semut dengan kadar 2-3%, sehingga tidak dapat merasakan harga jual yang tinggi. Tujuan dari kegiatan ini adalah untuk membantu mitra supanya dapat memproduksi gula semut dengan kadar air 2-3%, dengan membuat alat pengering gula semut dengan sumber energi gas buang hasil proses memasak nira. Metode yang digunakan dalam kegiatan ini adalah adalah model pemberdayaan masyarakat partisipatif / Participatory Rural Apraisal (PRA). Metode ini dipilih berdasarkan pertimbangan bahwa yang mempunyai atau menghadapi masalah adalah mitra, oleh karena itu keterlibatan mitra dalam penentuan pemecahan masalah yang dihadapi dan penyelesaiannya sangat diperlukan. Tahapan yang dilakukan dalam penyelesaian masalah mitra adalah, identifikasi temperature oven, waktu yang dibutuhkan dalam proses pengeringan, identifikasi kapasitas pengering, kapasitas produksi gula semut, perancanangan pengering, pembuatan dan penerapan gagasan pada kelompok tani. Tahap terakhir dari kegiatan ini adalah penyusunan laporan kemajuan, artikel ilmiah untuk keperluan publikasi, dan laporan akhir. Dari kegiatan yang sudah dilaksanakan hasil luaran sebagai berikut Publikasi ilmiah di jurnal/Prosiding, Peningkatan omzet pada mitra terjadi peningkatan jumlah gula kering sekitar 30% dari produk yang dihasilkan, Peningkatan kualitas produk dengan menghasilkan gula semut kering. Peningkatan pemahaman dan ketrampilan masyarakat untuk pengelolaan gula semut sampai kadar air 2-3%, serta dihasilkan Teknologi tepat guna untuk membantu masyarakat pembuat gula semut meningkatkan kualitas produksinya.
Evaluasi Ketercapaian Standar Penjaminan Mutu Penelitian Di Program Studi D3 Mesin Otomotif Universitas Muhammadiyah Magelang Dengan Metode Indeks Setiyo, Muji; Waluyo, Budi; Saifudin, .; Purnomo, Bagiyo Condro; Munahar, Suroto; Widodo, Noto; Rusdjijati, Retno
Jurnal Penjaminan Mutu Vol 4, No 1 (2018)
Publisher : LPM IHDN Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.642 KB) | DOI: 10.25078/jpm.v4i1.397

Abstract

In the past decade, the general method for measuring the performance of research and scientific publications in a Study Program at a Higher Education is by the Rough Value (Nilai Kasar, NK) calculated per three years. This value is derived from the accreditation instrument. In fact, the calculation of the performance of research and scientific publications with NK cannot represent an annual performance. Therefore, this paper presents a new method for calculating research and scientific publications performance with an index (IP-PS and IPub-PS), which is calculated annually. An example of quality measurement practice in the Automotive Diploma Program of Universitas Muhammadiyah Magelang. As a result, calculations with IP-PS and IPub-PS are more likely to present real conditions per year than using NK.
Implementasi Pemanfaatan Biogas Sebagai Energi Pendingin Susu Di Kecamatan Cepogo Kabupaten Boyolali munahar, suroto; Purnomo, Bagiyo Condro; Widiyanto, Andi
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol 3 No 2 (2019): JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : Dewan Pimpinan Daerah (DPD) Forum Dosen Indonesia JATIM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.397 KB) | DOI: 10.36339/je.v3i2.222

Abstract

Central Java Province is a province that has dairy producing areas, including Boyolali Regency. This area is known as a dairy producing area that can supply milk needs in the Semarang, Klaten and Solo regions. However, the milk processing industry has not fully supported the dairy farmers. This condition can be known when the milk processing industry sets too high quality standards, causing problems for dairy farmers. This effect causes milk from dairy farmers to be thrown away. Another problem arises due to the inaccurate time of collection with the time of milk extraction to be accommodated in the KUD. Milk storage and cooling equipment owned by cattle farmers are not optimal because they use electricity sourced from PLN, thus increasing production costs. For that reason, in solving these problems by making milk storage devices and coolers with energi from biogas. The results of the implementation of this technology can reduce production costs because the milk storage process does not require energi from PLN. Besides, it can reduce milk wasted due to wrong timing of milk collection and order.
Track Record and Research Challenges of Automotive Vocational Lecturer in Indonesia: Screening from Google Scholar 2016-2018 Bagiyo Condro Purnomo; Muhammad Latifur Rochman; Muji Setiyo
Jurnal Teknik Mesin (JTM) Vol 9, No 1 (2019)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.522 KB)

Abstract

This article presents a research review of automotive vocational lecturers in Indonesia obtained from Google Scholar during 2016-2018. We found more than 500 articles on Google Scholar produced by 277 lecturers from automotive vocational programs. However, through data filtering, there are only 208 publications related to automotive, including the development of learning media in VHE. Looking at the world automotive research trend (which leads to major issues regarding battery systems, downsizing and turbocharging, and advanced combustion modes), and with concerns about the availability of fossil energy, major and fundamental reforms are needed for research activities in automotive vocational lecturers in Indonesia, both in terms of topic and depth of research material. As a recommendation, stakeholders in automotive vocational programs in universities should immediately form a research roadmap together and form a national automotive research consortium in order to contribute in realizing environmentally friendly vehicle technology and a sustainable national transportation system.
Implementasi Pemanfaatan Energi Terbuang Untuk Kelompok Wanita Tani Pembuat Gula Semut di Kecamatan Candimulyo Kabupaten Magelang Purnomo, Bagiyo Condro; Waluyo, Budi
Community Empowerment Vol 2 No 2 (2017)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.686 KB)

Abstract

Sebagian masyarakat di Kecamatan Candimulyo merupakan pengrajin gula kelapa, bahkan pekerjaan yang dilakoni hingga turun temurun. Permasalahan yang dihadapi mitra adalah mitra tidak bisa memproduksi gula semut dengan kadar 2-3%, sehingga tidak dapat merasakan harga jual yang tinggi. Tujuan dari kegiatan ini adalah untuk membantu mitra supanya dapat memproduksi gula semut dengan kadar air 2-3%, dengan membuat alat pengering gula semut dengan sumber energi gas buang hasil proses memasak nira. Metode yang digunakan dalam kegiatan ini adalah adalah model pemberdayaan masyarakat partisipatif / Participatory Rural Apraisal (PRA). Metode ini dipilih berdasarkan pertimbangan bahwa yang mempunyai atau menghadapi masalah adalah mitra, oleh karena itu keterlibatan mitra dalam penentuan pemecahan masalah yang dihadapi dan penyelesaiannya sangat diperlukan. Tahapan yang dilakukan dalam penyelesaian masalah mitra adalah, identifikasi temperature oven, waktu yang dibutuhkan dalam proses pengeringan, identifikasi kapasitas pengering, kapasitas produksi gula semut, perancanangan pengering, pembuatan dan penerapan gagasan pada kelompok tani. Tahap terakhir dari kegiatan ini adalah penyusunan laporan kemajuan, artikel ilmiah untuk keperluan publikasi, dan laporan akhir. Dari kegiatan yang sudah dilaksanakan hasil luaran sebagai berikut Publikasi ilmiah di jurnal/Prosiding, Peningkatan omzet pada mitra terjadi peningkatan jumlah gula kering sekitar 30% dari produk yang dihasilkan, Peningkatan kualitas produk dengan menghasilkan gula semut kering. Peningkatan pemahaman dan ketrampilan masyarakat untuk pengelolaan gula semut sampai kadar air 2-3%, serta dihasilkan Teknologi tepat guna untuk membantu masyarakat pembuat gula semut meningkatkan kualitas produksinya.
Implementasi Energi Biogas Sebagai Energi Alternatif Pembangkit Listrik di Kabupaten Boyolali Bagiyo Condro Purnomo; Andi Widiyanto; Suroto Munahar; Anisa Hakim Purwantini; Lintang Muliawanti; Moch. Imron Rosyidi
CARADDE: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 2 (2020): Desember
Publisher : Ilin Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31960/caradde.v3i2.549

Abstract

The purpose of this community service activity is to implement biogas energy as an alternative energy for micro-scale power plants, given the considerable potential possessed by Gedangan Village, Cepogo District, Boyolali Regency. The implementation method used in this activity is participatory rural appraisal approach that involves the active role of the community, to resolve problems or obstacles faced by dairy farmers with. The activity begins with the identification of the problems faced by the partners, then the design and implementation of the conversion of biogas to electricity as a micro-scale biogas power plant and ends with assistance to dairy farmers and the community. The result of the activity is production of biogas energy power plants in three locations with potential energy of 15 KW, which can be used to reduce management and maintenance costs for dairy cows and household needs as well. This activity also facilitates knowledge transfer to the people of Gedangan Village, Cepogo District, Boyolali Regency to be able to independently develop this biogas energy source. Thus this service activity provides considerable benefits for the residents of Gedangan Village, Cepogo District, Boyolali Regency in fulfilling energy from the conversion of biogas to electrical energy.
Karakteristik Refrigeran Musicool Dalam Mesin Refrigerasi Kompresi Uap Menggunakan Evaporator Ganda Purnomo, Bagiyo Condro; Widodo, Noto; Munahar, Suroto; Nugroho, Dimas
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 1, No 2 (2020): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.010208

Abstract

Musicool is an alternative refrigerant developed as a working fluid in a steam compression refrigeration system. Musicool has many advantages compared to conventional refrigerants, the advantage is that it is environmentally friendly. This study aims to determine the characteristics of musicool 134 on a steam compression refrigeration machine using a double evaporator. The test is done by comparing the characteristics of a single evaporator refrigeration machine and a double evaporator using musicool 134. The research variable is the air flow through the evaporator that is equal to 0.022 kg / s, 0.027 kg / s, 0.033 kg / s. The test data is taken by measuring the temperature and pressure of each component in the refrigeration machine, then using the P-h diagram musicool 134, to determine the performance of the refrigeration machine. The results of the study provide information that the use of a double evaporator will give rise to an improved refrigeration system performance compared to using a single evaporator.
KARAKTERISTIK SISTEM REFRIGERASI KOMPRESI UAP DENGAN REFRIGERANT CAMPURAN MUSICOOL 134 - CO2 Bagiyo Condro Purnomo; Muji Setiyo
Jurnal Teknologi Vol 9, No 2 (2017): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.9.2.57-64

Abstract

Penelitian ini membahas penggantian refrigeran R-134a yang berpotensi ODP dan GWP dengan refrigeran campuran Musicool 134 - CO2  pada sistem refrigerasi kompresi uap yang diaplikasikan pada sistem AC mobil. Karekteristik sistem AC diamati pada variasi putaran blower sebagai beban pendinginan dan variasi komposisi refrigeran CO2 pada Musicool 134 (0% CO2, 1,5% CO2 dan 3% CO2). Pada konfigurasi tersebut, dilakukan pengukuran temperatur dan tekanan refrigeran. Hasil penelitian menunjukkan bahwa refrigeran Musicool 134 yang dicampur dengan CO2 memberikan kinerja yang menjanjikan sebagai pengganti R-134a.