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Exergy analysis on a thermoelectric heat recovery device with an exhaust gas heat source from a combustion engine Sarwo Edhy Sofyan; Pratama, Yudha; Khairil, Khairil
Journal of Mechanical Engineering and Fabrication Vol. 2 No. 2 (2025): September
Publisher : Journal of Mechafa Engineering and Fabrication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64273/jmef.v2i2.25

Abstract

An internal combustion engine converts thermal energy into mechanical work with an efficiency of approximately 35–40%, depending on the engine type and operating conditions. This indicates that about 60–65% of the total energy is wasted, primarily in the form of heat loss through the cooling system, exhaust gases, and mechanical friction. One potential approach to improve engine efficiency is by recovering waste heat using a thermoelectric generator (TEG) system. This study aims to analyze the exergy performance of a thermoelectric heat recovery system that utilizes exhaust gas heat from an internal combustion engine as an energy source. The analysis focuses on the influence of engine speed variation and aluminum fin configuration on the exergy value, exergy destruction, and exergy efficiency to enhance waste heat utilization. The heat recovery system is connected to the exhaust pipe outlet, and several fin configurations are investigated: left–left-right, top–bottom, all-sided, and without fins. Tests were conducted at engine speeds of 1300, 1600, 1900, and 2200 rpm to observe variations in energy distribution and efficiency. The results indicate that the exergy value generated by the thermoelectric heat recovery system increases with higher engine speed. This finding demonstrates that the proposed system can effectively improve the thermal efficiency of internal combustion engines by converting exhaust heat into useful energy, contributing to overall energy savings and the development of more efficient energy conversion technologies.
Penerapan Virtual Private Network Dalam Akses File Server Di Kantor Kecamatan Air Dikit Santoso, Feby; Khairil, Khairil; Supardi, Reno
Jurnal Multidisiplin Dehasen (MUDE) Vol 4 No 4 (2025): Oktober
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/mude.v4i4.9070

Abstract

The implementation of Virtual Private Network for file server access at Air Dikit Sub-District Office can assist Air Dikit Sub-District Office in managing files sent by each village office, as well as simplify the process for village offices to send population reports and other documents to Air Dikit Sub-District Office via Virtual Private Network. File server access at Air Dikit Sub-District Office is built using a Samba server with the Linux Ubuntu Server 24.04.1 operating system. The server contains 7 shared folders corresponding to the names of each village office within Air Dikit Sub-District, and each Village Office is assigned 1 operator account used to access these shared folders. Additionally, there is a condition where a village office cannot access another village office's folder due to the authentication and verification process for operator accounts on each shared folder. Based on the testing conducted, the use of Hamachi VPN is limited to only 5 users who can connect, as the Hamachi version used is still the trial/free version.
Membangun Website Organisasi Pencak Silat Berbasis Virtual Private Server (VPS) Pebrianto, Debi; Khairil, Khairil; Asyari, Ahmad
Jurnal Multidisiplin Dehasen (MUDE) Vol 4 No 4 (2025): Oktober
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/mude.v4i4.9089

Abstract

The development of information technology has encouraged organizations to utilize digital media as a means of promotion and communication. This study aims to build a professional, informative, and widely accessible pencak silat organization website through Virtual Private Server (VPS) infrastructure. The development methods used include system requirements planning, interface design, website implementation using the latest web technologies (such as HTML, CSS, JavaScript, and PHP), and VPS configuration for independent hosting. This website provides features such as an organization profile, activity gallery, latest news, online member registration, and a content management system that makes it easy for administrators to update information. The use of VPS provides flexibility in server management, better security, and more stable performance compared to shared hosting. The final result shows that the website built can function properly and meet the organization's needs in terms of digitalizing information and membership services. With this website, it is hoped that Pencak Silat organization can enhance its presence in the digital era and expand its communication reach with the public.
Influence of Curing Conditions on Strength Characteristics of Sea Sand Mortar Datu, Irka Tangke; Ali, Adiwijaya; Jalali, Nur Aisyah; Khairil, Khairil
INTEK: Jurnal Penelitian Vol 7 No 2 (2020): October 2020
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v7i2.2720

Abstract

This present paper aims to investigate strength characteristics of cement mortar using natural sea sand as fine aggregate in different curing conditions. Research was carried out with making mortar mixtures by two types of cement, Portland Composite Cement (PCC) and Pozzolana Portland Cement (PPC) with tap water as mixing water. Characteristics of fine aggregate and strength of cement mortar use river sand (RS), sea sand (SS), and washed sea sand (WS) were observed. Further, specimens of cube mortar in size of 50 mm x 50 mm x 50 mm of six mortar mixture series were casted according to Indonesian Standard. At 24 hours after cube specimens were casted, cube mortar specimens were cured in three curing conditions such as tap water curing (TC), seawater curing (SC) and air curing (AC). After curing at certain period (3-day, 7-day, 14-day, and 28-day), cube mortar samples were tested in compressive strength. Results concluded that sea sand aggregate improve characteristic of mortar in compressive strength up to 28 days in all curing conditions, and there was no significant effect of type of curing water (TC and SC) on 28-day strength performance of mortar was obtained. In addition, sea sand could potentially be utilized as an aggregate in production of mortar and/or concrete.
Development of a 3D Augmented Reality Quizizz Learning Media Prototype in Implementing the Independent Learning Management in Schools Mesterjon Mesterjon; Suwarni Suwarni; Khairil Khairil; Roy Syahputra; David Alvindo
Proceeding International Conference Of Innovation Science, Technology, Education, Children And Health Vol. 4 No. 2 (2024): Proceeding of The International Conference of Inovation, Science, Technology, E
Publisher : Program Studi DIII Rekam Medis dan Informasi Kesehatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/icistech.v4i2.112

Abstract

This study aims to develop a learning media prototype based on the Quizizz application, combined with 3D Augmented Reality (AR) technology, to support the implementation of Merdeka Belajar management in schools. AR technology enables the integration of virtual objects into real-world environments in real time, creating an interactive and engaging learning experience for students. Validation tests conducted at SMK N 03 Kota Bengkulu revealed that students experienced enjoyable and interactive learning, especially in the hardware introduction subject for the Computer and Network Engineering (TKJ) program. This prototype also supports teachers and educational institutions in implementing the Merdeka Belajar curriculum and can be used by parents and students as a learning aid at home. Furthermore, test results indicate that this media can serve as a supportive tool for the Merdeka Belajar Kampus Merdeka (MBKM) program. This prototype holds significant commercial potential through subscription or licensing models for schools and educational institutions, along with AR content that can be tailored to specific curriculum needs. The key advantages of this innovation include interactivity, support for learning flexibility, integration of cutting-edge technology, and accessibility through common devices like smartphones and tablets. The development stages include research and development, prototype creation, testing, product launch, as well as ongoing maintenance and feature enhancement.
Development of a 3D Augmented Reality Quizizz Learning Media Prototype in Implementing the Independent Learning Management in Schools Mesterjon Mesterjon; Suwarni Suwarni; Khairil Khairil; Roy Syahputra; David Alvindo
Proceeding International Conference Of Innovation Science, Technology, Education, Children And Health Vol. 4 No. 2 (2024): Proceeding of The International Conference of Inovation, Science, Technology, E
Publisher : Program Studi DIII Rekam Medis dan Informasi Kesehatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/icistech.v4i2.112

Abstract

This study aims to develop a learning media prototype based on the Quizizz application, combined with 3D Augmented Reality (AR) technology, to support the implementation of Merdeka Belajar management in schools. AR technology enables the integration of virtual objects into real-world environments in real time, creating an interactive and engaging learning experience for students. Validation tests conducted at SMK N 03 Kota Bengkulu revealed that students experienced enjoyable and interactive learning, especially in the hardware introduction subject for the Computer and Network Engineering (TKJ) program. This prototype also supports teachers and educational institutions in implementing the Merdeka Belajar curriculum and can be used by parents and students as a learning aid at home. Furthermore, test results indicate that this media can serve as a supportive tool for the Merdeka Belajar Kampus Merdeka (MBKM) program. This prototype holds significant commercial potential through subscription or licensing models for schools and educational institutions, along with AR content that can be tailored to specific curriculum needs. The key advantages of this innovation include interactivity, support for learning flexibility, integration of cutting-edge technology, and accessibility through common devices like smartphones and tablets. The development stages include research and development, prototype creation, testing, product launch, as well as ongoing maintenance and feature enhancement.
PENINGKATAN HASIL BELAJAR SISWA DALAM PEMBELAJARAN IPA DENGAN MENGGUNAKAN METODE INKUIRI DI KELAS V SD NEGERI KHAIRIL, KHAIRIL
e-Jurnal Inovasi Pembelajaran Sekolah Dasar Vol 1, No 1 (2013): (Januari-Juli) e-JIPSD
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/e-jipsd.v1i1.192

Abstract

This method gives students the chance to think, train students memrcahkan msalah find their own answers. Research objectives were to describe the increase in science learning outcomes using the inquiry. The research was conducted in the first semester of the school year 2012/2013 in SD N 06 Situjuah Batua County District Situjuah Limo Nagari Fifty Cities. The study was Classroom Action Research (CAR) with qualitative and quantitative approaches. This study conducted two cycles, cycle 1 held 2 meetingsandcycleIIheld1meeting. The results of the research cycle 1 1 meeting in RPP got enough percentage of 71.4%, cycle 1 meeting 2 92.8% , on the second cycle 1 meeting 96.4% . The average yield was 82.1% first cycle. In the second cycle 96.4% , then the average - average cycle I and cycle II was 89.25% . Assessment of aspects of teachers in cycle 1 pertmuan 1 for 79.7% cycle 1 meeting 2 the average percentage of 83.6% Well, the first meeting of the second cycle of 96.9% Very Good average cycle 1 and cycle II to obtain the percentage of 90.25% Very Good. From the aspect of cycle 1 meeting 1 for 71.4%, cycle 1 meeting 2 by 82% Both the average percentage of 76.5% first cycle, second cycle 1 meeting by 89% Good Once, the average cycle 1 and cycle II of 82.75%. From the results of student learning cycle 1 meeting 1 for 62 Enough, at cycle 1 meeting 2 average 80 Well, on the second cycle of 86 .   Kata Kunci : peningkatan;hasil belajar IPA; metode; inkuiri
Development of Kahoot-based Learning Media in Geography Subjects Khairil, Khairil; Suasti, Yurni; Ernawati, Ernawati
International Journal of Educational Dynamics Vol. 3 No. 2 (2021): International Journal of Educational Dynamics (IJEDs)
Publisher : Postgraduate School, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijeds.v3i2.428

Abstract

To create an effective learning atmosphere in the classroom, teachers need to use various types of media. One of the media that can be used in geography learning is learning by using Kahoot. This study aims to determine the feasibility of the Kahoot application as a geography learning medium. The type of research used is Research and Development (R&D). This study uses the ADDIE development research model, with the following development stages Analysis; Design; Development; Implementation; and Evaluation. The results of validation by material experts with an average percentage of 87% with very decent criteria. Media expert validation results with an average percentage of 85% with very decent criteria. The results of the small group trials of students with an average of 84% with very decent criteria. The results of large group trials on students with an average of 84%. So it can be concluded that the development of Kahoot-based geography learning media is feasible to use in geography learning.
Perilaku Reduksi Briket Bijih Besi dan Batubara Peringkat Rendah Aceh Ali, Nurdin; Khairil, Khairil; Saputra, Mahendra
Jurnal Rekayasa Kimia & Lingkungan Vol 13, No 1 (2018): Jurnal Rekayasa Kimia & Lingkungan (June, 2018)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v13i1.10185

Abstract

Peneltian ini adalah bertujuan untuk mengkaji tentang pengolahan bijih besi menggunakan metode reduksi langsung berbasis pada batubara peringkat rendah dari Nagan Raya, Aceh. Proses reduksi langsung menggunakan reaktor pemanas listrik untuk mengsimulasikan temperatur reduksi. Temperatur reduksi yang digunakan adalah 550o, 650o, dan 750oC, kemudian dinjeksikan gas CO2 dan N2 sebanyak 10 dan 1 liter/menit sebagai media pereduksi. Rasio persen komposisi batubara, bijih besi dan ter yang digunakan adalah 80:10:10, 70:20:10, dan 60:30:10. Model shrinking core diaplikasikan untuk mempelajari prilaku reduksi briket bijih besi dan batubara. Hasil penelitian menunjukkan, bahwa laju reduksi meningkat dengan meningkatnya persen batubara briket, temperatur dan interval waktu reduksi. Laju penurunan massa dan reduksi briket maksimum terjadi pada temperatur 750oC dengan variasi campuran 60:30:10 adalah 0,237 dan 23,66%. Energi aktivasi untuk variasi batubara 10, 20 dan 30% berturut-turut adalah 10,14, 3,73 dan 2,82 kJ/mol.
Modeling and Simulation on NOx and N2O Formation in Co-combustion of Low-rank Coal and Palm Kernel Shell Mahidin, Mahidin; Gani, Asri; Khairil, Khairil
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 2 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

NOx and N2O emissions from coal combustion are claimed as the major contributors for the acid rain, photochemical smog, green house and ozone depletion problems. Based on the facts, study on those emissions formation is interest topic in the combustion area. In this paper, theoretical study by modeling and simulation on NOx and N2O formation in co-combustion of low-rank coal and palm kernel shell has been done. Combustion model was developed by using the principle of chemical-reaction equilibrium. Simulation on the model in order to evaluate the composition of the flue gas was performed by minimization the Gibbs free energy. The results showed that by introduced of biomass in coal combustion can reduce the NOx concentration in considerably level. Maximum NO level in co-combustion of low-rank coal and palm kernel shell with fuel composition 1:1 is 2,350 ppm, low enough compared to single low-rank coal combustion up to 3,150 ppm. Moreover, N2O is less than 0.25 ppm in all cases.Keywords: low-rank coal, N2O emission, NOx emission, palm kernel shell
Co-Authors Aan Marsela Abdul Hadi Abdul Wahid Abdullah Abdullah Abdullah Abdullah Abdussalam Al Akbar Achmad Fikri Sallaby Ade Pratama, Efran Fernando Adha, Iqbal Rahmat Adi Setiawan Adiansyah, Febri Adyatma, Rayos Afrija, Lia Nur Agus Kurniawan, Rafiq Aji Sudarsono Akbar, Abdussalam Al Ali, Adiwijaya ALI, NURDIN Alinse , Rizka Tri Ambarwati, Dea Ananda Amin, Pangeran Al Andi Hartono, Andi Andry, Ricky Zulfi Antoni, Ariska Apriani, Ramalia Apriansyah, Deri Aprianto, Sandi Aptrio, Zendi Aripilahi, Edwin Arsy Tiara, Annisa Asiah MD Asnawati Asnawati Asri Gani Asyari, Ahmad Asyhari, Ahmad Azhari Azhari Aziz, Muhammad Al Bagus Putra Wijaksana Beny Setiawan Beti , Ilayati Beti, Ila Yati Budiarti, Iis Giri Carmen Martin Catrayasa, I Wayan Cesar R. Chamorro Chairunnisa Chairunnisa Cut Nurmaliah D., Asiah M. Datu, Irka Tangke David Alvindo deri apriansyah Devi Syafrianti Dewangga, Hoki Dewantara, Dewantara Dharma, Andree Adhi Diah Azhari Dimas Aulia Trianggana Dwipoyono, Nopri Eddy Koesoemanegara Eko Prasetyo Rohmawan Eko Suryana Elka Lukman Hakim Ernawati Ernawati Evi Salasiah A, Evi Salasiah Faisal Faisal Faisal Mustafa Fajriana, Mona Fat, Pohaja Syahrul fathur hadyan Fatimah, Dimas Mekar Ayu Fazrina Fazrina Felino, Ferdianto Feri Hari Utami, Feri Hari Ferry Hari Utami Fitria, Humairah Fredricka, Jhoanne Gultom, Doni Johan Hafnati Rahmatan Hamdani Hamdani Handayani, Lefi Evti Handayani, Setiaji Ayu Handayani, Sri Hani, M. Reza Hanila, Siti Hari Aspriyono Hasanuddin Hasanuddin Hasanuddin Hasanuddin Hedriansyah Hedriansyah Hendri Alamsyah Herlina Latipa Sari Hermana, M.Arafat Herri Fariadi, Herri Herrianto, David Heti Heti, Heti IDA SAFITRI Indra Kanedi Indriani, Inda Mareta Irawansyah, Riki Irwanda, A’af Teguh Ismul Huda Iswadi Iswadi Jose J. Segovia Juju Jumadi Julia Julia Julistina, Melly Juniansyah, Dedy Jusuf Wahyudi Juwita, Wenty Ratna Kemal Atatur, Alvin Mustofa Kemala Sari Ketut Tirtayasa Khairunisak Khairunisak Kodia, Elsi Kusmajid, Kusmajid Leni Natalia Zulita Lia Astari Lianda, Deri Linia Junita, Empi Desni Liza Yulianti Luh Putu Ratna Sundari Luthfi Luthfi M Ali S Mahidin Mahidin Malia Safriani Maulita, Anis Mesterjon Mesterjon Miguel A. Villamanan Moh Syahrul A’dlom Muhammad Syukur Muhibbuddin Muhibbuddin Muthoharoh, Marfuatin Nasution, Raihan Novanza Natalia, Leni Ngaliman, Ngaliman Ningrum, Endah Puspa Ninosari, Devina Noviasyah, Nonong Novita Sari, Venny NST, Khairil Fajri Nugroho Ponco Riyanto Nur Aisyah Jalali, Nur Aisyah Nurjanah, Firda Nur’aini, Hesti Oktaria, Nenni Pebrianto, Debi Prama Wira Ginta Pratama, Yudha Pratiwi, Ii Putra, Adi Pramono Putra, Januar Syah Putra, Oktian Dwi Pradana Putri, Anggita Gledisyah Putri, Suryani Rizki Rahmadhan, Ihsan Rahman, Riski Rahmatan*, Hafnati Ramadani, Tri Rena Ariyanti Ridwan, Ridwan Riyanto, Defri Rizki bunga ameli Rizkina Manik Rohmawan, Eko Prasetiyo Rosdiana Meliana Situmorang ROSMERI, ROSMERI Roy Syahputra Rozzi, Yoli Andi Rusli, Govi S Siswanto Sabuki, Sabuki Sahputra, Ikwan Sallaby, Achmad Fikri Samingan Samingan Sania, Yuni Santoso, Feby sapri sapri Sapri Sapri Saputra, Aditia Saputra, Mahendra Saputra, Muhammad Azan Dwi Saputra, Peni Saputra, Tommy Ade Sari, Apriani Purwita Sari, Venny Novita Sartika, Devi Sarwendah Ratnawati Hermanto Sarwo Edhy Sofyan sefriansyah sefriansyah sefriansyah, sefriansyah SEPTIAN, DWI Shobori, Ihsan Silviani, Yessi Sofyan, Sarwo Edhy sono, Aji Sudar Supardi, Reno Supriatno Supriatno Suwarni Suwarni Suwarni, Meli Syafputra, Herizal Syaputra, Robby T.M.I. Mahlia Tarsani, Tarsani Toibah Umi Kalsum Tongku Nizwan Siregar Tutiliana ., Tutiliana Utama, Anugrah Utama, Delta Anugrah Utama, Reza Afrio Utami, Liza Venny Novita Sari Wahyu Hidayat Wahyudi, Aryo Sumirso Wandi, Dehar Wijaya, Hendi Raden wijaya, randi Wulandari Wulandari Wusnah Wusnah, Wusnah Yasa, Pri Yogha yono, Hari Aspri Yupianti, Yupianti Yurni Suasti Yusuf, Abdilah ZARKASI, MUHAMMAD Zulfiandry, Ricky Zulfiandy, Ricky