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All Journal FLUIDA Buletin Ilmiah Sarjana Teknik Elektro Ideguru: Jurnal Karya Ilmiah Guru Journal of Mechanical Design and Testing (JMDT) INJURITY: Journal of Interdisciplinary Studies
Heru Hermawan
Universitas Muhammadiyah Purworejo
Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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 1 
Optimization of Water Falling Points in Micro Hydro Power Plants Hermawan, Heru; Sunardi, Sunardi
Buletin Ilmiah Sarjana Teknik Elektro Vol 3, No 1 (2021): April
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v3i1.1477

Abstract

Micro Hydro Power Plant (PLTMH) is an alternative source of electrical energy for the community. PLTMH provides many benefits, especially for rural communities throughout Indonesia. When other energy sources start to run low and have a negative impact, water becomes a very important source of energy because it can be used as an energy source. PLTMH is a small-scale power plant that uses hydropower as its driving force such as irrigation channels, rivers, or natural waterfalls by utilizing the waterfall height (head) and the amount of water discharge. In rivers, there is the potential for sufficient water availability throughout the year, reliable discharge, suitable contours, and has been used for MHP. However, this river has decreased the electrical power it produces. Therefore, in this PLTMH river, it is necessary to analyze and recalculate the electric power generated by optimizing the water drop point, using an 8-inch pipe to produce a tangential force of 814.28 N, then using a 3-inch pipe to produce a tangential force of 100, 62 N and using a 2-inch pipe produces a tangential force of 25.37 N.
Implementation of Advanced Coal-Biomass Blending and Fuel Stock Management at Pelabuhan Ratu Power Plant Nurahman, Herowiko Thama; Hermawan, Heru
Journal of Mechanical Design and Testing Vol 6, No 1 (2024): Articles
Publisher : Department of Mechanical and Industrial Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jmdt.97746

Abstract

The issue of climate change is of particular concern to countries around the world, including Indonesia. Many efforts are being and will be made to contribute to addressing climate change issues. Pelabuhan Ratu Power Plant (3 x 350 MW) belongs to PT PLN Indonesia Power. In line with the PLN Transformation (GREEN aspect) and the PT PLN Indonesia Power program ("Green Boosters"), Pelabuhan Ratu Power Plant contributes to produce low-carbon sustainable energy by cofiring biomass (sawdust). There are two main challenges in implementing cofiring. The first is the poor biomass handling and blending methods that are typically used in power plants. The second is the low calorific value of coal and biomass blending due to the improper blending process. To overcome these challenges, Pelabuhan Ratu Power Plant has developed an advanced coal-biomass blending and fuel stock management digitalization. By applying advanced method of coal-biomass blend, the biomass utilization (total, monthly average, and daily average) increased significantly in 2022 and 2023. Total biomass utilization increased up to 171% and still possible to be higher. The green energy production increased up to 255% and GHG emission reduced up to 255%. The fuel stock management provides optimal blending recommendations as operators' guidelines. As a result, potential derating loss due to low calorific value of blended products can be reduced by 59.9%.
The Methylene Blue Adsorption by Calcium Alginate-Activated Carbon Composite in Fixed Bed Column Wardana Putra, Adzikri; Hermawan, Heru; Setyaningrum, Sinta; Paramitha, Tifa
Fluida Vol. 17 No. 2 (2024): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v17i2.4926

Abstract

Methylene blue is a material that is often used as a cationic dye in the textile industry. Methylene blue is toxic and difficult to degrade. Adsorption is one method to reduce the methylene blue from wastewater. In this study, methylene blue was adsorbed by calcium alginate/activated carbon composite (CaAlg-AcC) in a fixed bed column. The influence of CaCl2.2H2O concentration, initial concentration of methylene blue, and flow rate in the continuous adsorption process were investigated. Every adsorption process was done in 110 min. The results revealed that the CaAlg-AcC composite synthesized using 1% (w/v) CaCl2.2H2O solution has the highest adsorption percentage, 95.28% in 110 min. The initial methylene blue concentration 50 mg/L gave the highest result of adsorption percentage with the smallest amount of methylene blue adsorbed of 31.77 mg.  The flow rate of methylene blue 4 ml/min reached the highest adsorption percentage with the amount of methylene blue adsorbed of 41.79 mg.
The Influence of Field Agricultural Extension (PPL) Development on The Dynamics of Farmer Groups Rahmat Hidayat, Yayat; Faqih, Achmad; Hidayat, Toni; Sunaenah, Sunaenah; Faizal, Akhmad; Hermawan, Heru
Interdiciplinary Journal and Hummanity (INJURITY) Vol. 2 No. 8 (2023): INJURITY: Journal of Interdisciplinary Studies.
Publisher : Pusat Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58631/injurity.v2i8.106

Abstract

The role of agricultural extension workers is needed to improve the abilities, knowledge and skills of each member of the farmer group so that the goals of the farmer group can be achieved properly. An extension worker in fostering farmer groups in an effort to increase production and productivity by helping to develop definitive group plans (RDK) and (RDKK). In addition, in terms of fostering farmer groups, extension workers implement the Training and Visit (LAKU) work system. The purpose of this study is to determine the influence of agricultural extension workers in assisting the preparation of DRC and RDKK; knowing the development of agricultural extension workers in the Training and Visit Work System (LAKU); knowing the influence of agricultural extension worker development in assisting the preparation of RDK RDKK and agricultural extension worker development in the Training and Visit Work System (LAKU) on the Dynamics of Farmer Groups in the Farmer Fortune Association, Sukagumiwang Village, Sukagumiwang District, Indramayu Regency. This research was conducted in Sukagumiwang Village, Sukagumiwang District, Indramayu Regency. The research was carried out in October-December 2022. The respondents in this study were Farmer Groups in the Farmer Fortune Association (GAPOKTAN) as many as 89 people. The design used in this study was quantitative descriptive. Data analysis techniques in this study use descriptive analysis and multiple linear regression analysis, f-Test, t-Test and coefficient of determination. The results showed that the development of agricultural extension workers in assisting the preparation of RDK RDKK and the training and visit work system (LAKU) had a real effect on the Dynamics of Farmer Groups in the Farmer Fortune Association. The development of agricultural extension workers in assisting the preparation of RDK RDKK with the development of agricultural extension workers in the Training and Visit Work System has a real effect together on the Dynamics of Farmer Groups in the Farmer Fortune Association.
Upaya Meningkatkan Fisik dan Kelincahan Siswa dengan Metode Ilinois Run pada Ekstrakurikuler Futsal Cahyani, Olivia Dwi; Prasetyo, Aris; Hermawan, Heru
Ideguru: Jurnal Karya Ilmiah Guru Vol 9 No 1 (2024): Edisi Januari 2024
Publisher : Dinas Pendidikan, Pemuda dan Olahraga Daerah Istimewa Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51169/ideguru.v9i1.622

Abstract

Futsal sport is one of the activities that require good techniques, tactics and physical conditions in futsal extracurricular activities requires good physical condition in order to have an effect on the players. This study aims to find out the physical condition of futsal extracurricular participants at SMPN 2 Padangan. The research technique used in this study is a survey technique in the form of descriptive research in the form of quantitative data collection, testing and measurement using the ilinois agility runs method on 25 students who participated in extracurricular futsal with a research duration of one week. The results of this study classified futsal participants into the categories of "good" speed, "good" mobility, and "good" cardiorespiratory endurance. In the formula for categorizing futsal extracurricular participants, the category is sufficient so that it can be concluded that futsal extracurricular participants have sufficient category physical conditions. Based on the results of calculations and data analysis, it can be concluded that there have been changes in students due to the influence of the direct class learning model on Ilinois and skill learning.
Co-Authors Aris Prasetyo Faizal, Akhmad Faqih, Achmad Hidayat, Toni Nurahman, Herowiko Thama Olivia Dwi Cahyani Paramitha, Tifa Rahmat Hidayat, Yayat Setyaningrum, Sinta Sunaenah, Sunaenah Sunardi, Sunardi Wardana Putra, Adzikri