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Dedet Hermawan Setiabudi, Dedet Hermawan
Sekolah Tinggi Teknologi Adisutjipto Yogyakarta
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Journal : Vortex

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PERANCANGAN WATER HEATER KAPASITAS 0,1 LITER PER DETIK DENGAN MEMANFAATKAN PANAS MATAHARI UNTUK MENDUKUNG KETAHANAN ENERGI Hamdani, Taufik; Sudarmanto, Sudarmanto; Setiabudi, Dedet Hermawan; Mardwianta, Benedictus; ahmadi, Nurfi; subarjo, Abdul haris; irawati, Mardiana
Vortex Vol 4, No 2 (2023)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v4i2.1667

Abstract

Population growth and technology development are increasing rapidly. These cause the use of energy on the earth is increasing. One effort to obtain energy sources is to utilize solar energy using solar water heater. This research was expected to help the society to save energy derived from fossils. A testing was conducted by designing solar water heater with collector size of 60 cm x 50 cm using black painted aluminum-coated styrofoam insulator and the storage tank made of stainless steel with volume of 40 liter using black painted aluminum-coated styrofoam. In conducting the testing, the data were taken at 09.00 a.m until 04.00 p.m for 5 days. The research was conducted at ITD Adisutjipto. The analysis and discussion showed the solar water heater design and the storage tank used to perform performance the test (efficiency). Within 5 days testing the average of water temperature out (Tout) was 59.75 oC to 76.59 oC with the average rate efficiency of 54.07 % to 54.9 % and the average storage drop rate of 2.97 K / Hr or 17.84 K for 6 hours
Analysis of the influence of groove welds of oxy-acetylene welding joints on tensile strength and microstructure on steel ST 37 Nugroho, Fajar; Muga, Yohanes Fernando Leo; Setiabudi, Dedet Hermawan; Sudarmanto, Sudarmanto
Vortex Vol 5, No 1 (2024)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v5i1.1955

Abstract

In this study, the authors conducted a study on the analysis of the effect of oxy-acetylene welding joints on tensile strength and microstructure in the HAZ and weld metal areas on st 37 steel plates. The results of this study indicate that the average value of the highest tensile strength value is at V groove weld with the average strength of the welded joint is 4.796 kgf/mm2. While the lowest tensile stress is on the I groove weld of 4.674 kgf/mm2. Meanwhile, from the microstructure test, it can be seen that in the HAZ area each groove. Microstructure in the HAZ area shows that the double V groove  weld types are fine ferrite, coarse pearlite and martensite. In type V groove  weld the structures formed are ferrite, coarse pearlite and martensite. In type I groove  weld the structures formed are ferrite, grain boundary ferrite and fine pearlite. Whereas in the weld metal area, and the results of the microstructure test of the weld area on the V seam, it shows a dense microstructure arrangement, the arrangement is identical to pearlite (dark color) so that the specimen is harder.
Pengolahan bioarang sebagai pengganti biogas dengan proses roasting pengolahan Kopi Arabica untuk mendukung ketahanan energi Santoso, Djarot Wahju; Sudarmanto, Sudarmanto; Husaini, Munawar; Mardwianta, Benedictus; Setiabudi, Dedet Hermawan; Subarjo, Abdul Haris
Vortex Vol 5, No 1 (2024)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/vortex.v5i1.2011

Abstract

Pengolahan limbah biochar menjadi briket untuk dijadikan biogas dalam rangka mendukung proses pemanggangan pengolahan kopi arabika merupakan salah satu inovasi energi alternatif untuk mendukung ketahanan energi. Penelitian bertujuan untuk mengetahui pengaruh komposisi briket dengan campuran limbah kulit kopi dan debu kayu terhadap nilai kalor, kadar air, kadar abu, dan uji densitas. Metode yang digunakan adalah eksperimental. Pada komposisi II nilai densitasnya paling tinggi karena jumlah serbuk gergaji paling banyak. karena dengan perlakuan gaya tekan manual maka partikel arang akan mengalami kompresi sesuai dengan gaya tekan yang diberikan. Hasil penelitian komposisi I menghasilkan nilai kalor sebesar 5922 kal/gr, komposisi II menghasilkan nilai kalor sebesar 6072 kal/gr. Hasil pengujian kadar abu SNI 01-6235-2000 tentang briket arang, kadar abu yang diperbolehkan tidak melebihi 8%. Kadar abu yang dihasilkan pada komposisi I sesuai dengan standar yang ditentukan.
Co-Authors abdul haris subarjo, abdul haris agustina setyaningrum, agustina Bambang Sudibya, Bambang Benedictus Mardwianta, Benedictus Djarot Wahju Santoso Dwi Aries Himawanto Eli Kumolosari FAJAR NUGROHO Freddy Kurniawan Hamdani, Taufik Husaini, Munawar Jalaali, Bahrul Kusumawardani, Mawar Lasmadi, Lasmadi Mardiana Irawati Masduqi, Edi Muga, Yohanes Fernando Leo Muhrom Khudhori, Muhrom Nurcahyani Dewi Retnowati Nurfi Ahmadi, Nurfi Okto Dinaryanto Pinandhita, Lazuardy Rahendra Prihandoko, Diananto Sri Mulyani Sudarmanto Sudarmanto, Sudarmanto Sukamta Sukamta Syahrizal Teguh Wibowo Triwibowo, Nur Ahmad Warniningsih, Warniningsih