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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 14 Documents
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Search results for , issue "Vol 5 No 1 (2020): April 2020" : 14 Documents clear
ANALISIS FAKTOR PENYEBAB TERJADINYA KECELAKAAN LALU LINTAS DI RUAS JALAN WATES – PURWOREJO KABUPATEN KULON PROGO Veronica Diana Anis Anggorowati
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.583

Abstract

Kecelakaan lalu lintas merupakan indikator utama tingkat keselamatan jalan raya. Di negara maju masalah keselamatan jalan sangat diperhatikan untuk mengurangi jumlah kecelakaan lalu lintas dan jumlah korban kecelakaan lalu lintas yang terjadi. Hal ini menjadi indikator terhadap pentingnya memahami karakteristik kecelakaan. Pada penelitian ini dibahas masalah kecelakaan lalu lintas yang terjadi di ruas Jalan Wates – Purworejo Kabupaten Kulon Progo. Tujuan dari penelitian ini adalah mengetahui lokasi rawan kecelakaan (black spot) di ruas Jalan Wates – Purworejo Kabupaten Kulon Progo, menganalisa faktor – faktor penyebab kecelakaan. Metode yang digunakan untuk menentukan lokasi rawan kecelakaan antara lain metode tingkat kecelakaan. Metode yang digunakan untuk mengetahui hubungan faktor – faktor penyebab kecelakaan adalah menggunakan analisis statistik (uji chi – square)Metode yang digunakan untuk menentukan lokasi rawan kecelakaan antara lain metode tingkat kecelakaan. Daerah / lokasi rawan kecelakaan (black spot) adalah suatu lokasi dimana tingkat kecelakaan tinggi dengan kejadian kecelakaan berulang dalam suatu ruang dan rentang waktu yang relatif sama yang diakibatkan oleh suatu penyebab tertentu. Data yang digunakan adalah data jumlah kecelakaan yang terjadi di ruas Jalan Wates – Purworejo Kabupaten Kulon Progo yang terjadi pada Bulan Januari hingga Bulan Desember tahun 2015 yang dikelompokkan berdasarkan karateristik.Gambaran komposisi karakteristik kecelakaan adalah sebagai berikut : Hari Sabtu sebanyak 9 kecelakaan dengan persentase 21,95%. Waktu Terang (06.00-18.00) sebanyak 25 kecelakaan dengan persentase 39,02%. Tabrakan sisi (samping) sebanyak 20 kecelakaan dengan persentase 48,78%. Sepeda Motor sebanyak 57 unit dengan persentase 69,51%. Luka Ringan (LR) sebanyak 115 orang dengan persentase 94,26%. Jenis kelamin laki-laki sebanyak 90 orang dengan persentase 73,77%. Usia diatas 46 tahun sebanyak 30 orang dengan persentase 24,59%. Jenis pekerjaan pegawai swasta/karyawan sebanyak 55 orang dengan persentase 45,08%. Hasil analisis juga menunjukkan bahwa terdapat 3 titik lokasi rawan kecelakaan (black spot) di segmen ruas Jalan Wates – Purworejo Kabupaten Kulon Progo yaitu Sta 0 – 1, Sta 1 – 2, Sta 10 – 11. Dan dari hasil uji chi – square terlihat adanya hubungan antara faktor usia, cuaca, jenis pekerjaan dan jenis kelamin dengan jumlah kecelakaan yang terjadi. Kata Kunci : karateristik kecelakaan, Black Spot, uji Chi – Square
PERENCANAAN SISTEM PHOTOVOLTAIC BEBAN ARUS SEARAH TERHUBUNG JALA-JALA Winasis; Muhammad Syaiful Haliim; Hari Prasetijo
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1565

Abstract

Photovoltaic (PV) systems utilize solar energy as a renewable energy source. A PV system can be connected to utility networks to ensure reliability. This study proposes a PV system model with direct current load on residential installation connected to utility grid. Optimal analysis of PV systems is done by comparing the architecture, energy production, losses, reliability and economic aspect considering the constraints of renewable energy fraction and capacity shortage. The results show PV system connections with grid reduce the capacity requirements of photovoltaic modules and batteries with a good level of reliability. The grid connected system equipped with batteries has the best level of renewable energy utilization with an excess electricity value of 2.19%. From an economic aspect, the system with the lower renewable energy fraction has less energy costs. This is due to the high price of PV components compared to the price of electricity from utility. Keyword : photovoltaic system, DC load, grid connected, optimal, utilization, reliability
APLIKASI BAND RATIO NDMI CITRA LANDSAT 8 DALAM PENENTUAN ZONA RAWAN LONGSOR DENGAN METODE OVERLAY ANALYSIS Vinansius Jimmy Jati; Sari Bahagiarti Kusumayudha; Tedy Agung Cahyadi
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1566

Abstract

Generally disaster research specifically identifies landslide-prone zones, over large areas with extreme terrain, usually secondary data on soil depth and texture are very rarely available, compared to topographic data, rock types, rock distribution and rainfall data. As an alternative the remote sensing method uses Landsat 8 imagery with the Normalized Difference Moisture Index (NDMI) band ratio method, the NDMI band ratio is able to identify the soil surface moisture index so that it can be interpreted with textures and soil depth related to the level of landslide vulnerability. With the method of overlay analysis using geographic information system (GIS) software, it is considered capable of analyzing the level of landslide vulnerability, especially in research on a regional scale, in remote areas that are difficult to access, based on secondary data availability. Keywords: Landsat, NDMI, Landslides, GIS
KAJI EKSPERIMENTAL PENGARUH KONDENSAT UNTUK MENDINGINKAN LIQUID LINE PADA CHEST TYPE MINI COOLER DENGAN METODE RADIANT COOLING Arda Rahardja Lukitobudi; Wendra Luthfi
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1567

Abstract

Liquid line sub cooler by condensate which is produced from chest type mini cooler wall is one of the methods to increase subcool so that the refrigeration capacity will increase and thus will save energy. Condensate which is produced by chest type mini cooler have lower temperature than the ambient temperature so it will decrease the liquid line temperature, where the condensate is flowed through the tube in tube of 30 cm long with 1 inch diameter to cool the liquid line. Radiant cooling is installed by planted evaporator coils in the cement wall where TXV is used as an expansion device with R22 as the refrigerant and 1 hp compressor capacity. Cabin having dimension of 50cm x 50cm x 50cm is cooled upto 5 0C to chilled 1 kg tomatos. The conclusion is that the chilling time with condensate HX is 35 minutes but without condensate HX is 38 minutes. The mean subcool temperature with condensate HX is 3.32 0C but without condensate HX is 0,03 0C. COPactual with condensate HX is 4.49 but without condensate HX is 4.55. System efficiency with condensate HX is 82.26% but without condensate HX is 80.66%. Energy consumption with condensate HX is 0.635 kWh but without condensate HX is 0.701 kWh. Keywords: radiant cooling, condensate, liquid line sub-cooler.
ANALISIS PENGARUH PENAMBAHAN BAHAN STABILISATOR ABU JERAMI TERHADAP KEPADATAN TANAH LEMPUNG EKSPANSIF KABUPATEN PAMEKASAN laily endah fatmawati; Herry Widhiarto; Heri Santoso
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1568

Abstract

Expansive clay is a soil that has a low carrying capacity and high shrinkage growth. Tthe soil has certain limited physical and mechanical properties. Therefore a stabilization is needed so that the parametric soils values ​​become better so that they can be used as subgrade in a construction. Tests carried out include, specific gravity testing, liquid limits, plastic limits, and compaction testing with proctor test and CBR test. The soil was used in this study was taken from the area Bujur Timur, Pamekasan. The soil included the CH group with a plasticity index of 43.5%. The percentage of addition of rice straw is 0%, 2%, 4%, 6%, 8%, 10% of the dry weight of the soil. The most optimum of proctor test results are the addition of rice straw ash by 5.8% with 0MC (Optimum Moisture Content) value of 15,20 % and dry content weight 1.72 gr/cm3. The optimum test results with 7.8% rice straw ash with a CBR value of 5.4% so that can be used for alternative soil improvement. Keywords: expansive clay, rice straw ash, soil stabilization, pamekasan
EVALUASI SALURAN TERBUKA ENGAN MENGGUNAKAN DISTRIBUSI GUMBELL DAN MODEL THOMAS FIERING Tedy Agung Cahyadi; Deka Citra Dinata; Dahono Haryanto; Hartono; Indun Titisariwati; Rendy Fahlevi
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1570

Abstract

ABSTRAK Nilai curah hujan yang akan terjadi tidak dapat ditentukan secara pasti dan tepat, akan tetapi dapat diperkirakan atau diprediksi. Tujuan dari penyusunan makalah ini adalah untuk membandingkan hasil pembangkitan data curah hujan menggunakan distribusi Gumbell dan model Thomas Fiering untuk selanjutnya menjadi acuan dalam pengolahan data desain saluran terbuka di tambang. Data yang digunakan selama Sembilan tahun (2009-2017), berasal dari data curah hujan milik Pusat Sumber Daya Air (PSDA) Provinsi Sumatera Barat. Dari hasil penelitian didapat nilai curah hujan hasil distirbusi Gumbell sebesar 138,97 mm/hari sedangkan nilai curah hujan berdasarkan perhitungan model Thomas Fiering sebesar 103,4 mm/hari. Dari hasil tersebut disimpulkan bahwa distribusi Gumbell digunakan untuk menjadi data acuan dalam mendesain saluran terbuka. Kata kunci: Curah Hujan, Distribusi Gumbell, Model Thomas Fiering, Saluran Terbuka
POTENSI AIRTANAH PADA BATUAN SEDIMEN VULKANIK DENGAN PENGUKURAN GEOLISTRIK DAERAH KECAMATAN PRAMBANAN, SLEMAN, YOGYAKARTA Wisnu Aji Dwi Kristanto; Nandra Eko Nugroho; Thamzez Nuur Anom; Ahmad Muhaimin
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1595

Abstract

Abstract Water is a basic human need for life. Increasing the world's population The quality of surface water is increasing, while the air demand will not stop. The source of clean water besides surface water is groundwater. Therefore, using groundwater as a source of air must be further for continuation. Prambanan area with geological conditions compiled by volcanic sedimentary rock available groundwater potential needs to be done related to groundwater in different places depending on where there is no layer containing groundwater. Identification of groundwater potential carried out in the study area using the geoelectric method. The results of geoelectric measurements show subsurface resistivity cross sections of the study area have two aquifer layers with the first layer 2 meters to 10 meters and the second layer 5 meters to 14 meters which are mostly found in lapilli units and some in sandstones and breccias. Keywords: groundwater potential, volcanic sedimentary rocks, geoelectric
INTERPRETASI ANOMALI MEDAN MAGNET BUMI DI KAWASAN GUNUNGAPI LAMONGAN Ninik Agustin
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1615

Abstract

Lumajang is one of district at Jawa Timur regency where located Lamongan volcanic area. Lamongan volcano is a young monogenetic volcano that was growth from a fault at the summit. Eruption at Lamongan volcano not only occurred at the main volcano, but also at parasite cone at Lamongan volcanic area with 37 cinder cones dan 27 maars. Cinder cones dan maars formed from contact of magma and water that cause freatomagmatic eruption with pyroclastic debris and material deposit’s flow. This research focused at mapping western Lamongan volcanic area based on magnetic anomalies to conducted vulcanic activities at subsurface. Based on magnetic anomalies data, there is an area at south, west, and north with high temperature subsurface rock around maars and cinder cones, that is indicated by negative magnetic anomaly. Keywords: Lamongan volcano, maar, cinder cone, magnetic anomalies.
MITIGASI KEGAGALAN INSULATION UDARA DI ZONA RIGHT OF WAY (ROW) PADA KETINGGIAN POHON PARASERIANTHES-FALCATARIA Utama, Budi; Yuliani, Oni; Handayani, Trie
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1719

Abstract

Abstract Total blackouts (on August 04, 2019) in the Special Capital Region of Jakarta have an impact to daily the economy and the cessation of MRT (Mass Rapid Transit) public transportation services, as well as public communication systems. The determination of the value of the voltage gradient for knowing of the black-out was used the method of analyses to the exposure of the electric fields under the Extra High Voltage (EHV) transmission lines 500 kV, at the span of the tower T.434 and T.435 in Malon hamlet, Gunung-Pati village, districts of Gunung-Pati, Semarang city - central Java. The analysis of the electric field exposured has been carried out in a simulation using a Matlab softwere by solving the simultaneous equations model that corresponding to the tower configuration system and how many conductors were used. The results of the simulation showed that there was a failure of air insulation between phase conductors and the trees of Sengon (Paraserianthes-Falcataria) at a value of voltage gradient of 32 448.10 kV / m, 66 861.13 kV / m, and 33 129.75 kV / m, each were for the lateral distance of 10 m, 12 m, and 14 m from the tower axis T.434 and T.435. Keywords: Mitigation, ROW, Paraserianthes-Falcataria, Transmission-lines
ANALISA PERFORMANCE BAN PADA UNIT PRODUKSI OVERBURDEN HD-785 TERHADAP PRODUKTIVITAS TAMBANG BATUBARA Puspita Sari, Laura
KURVATEK Vol 5 No 1 (2020): April 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i1.1775

Abstract

The growing need for coal production led to the greater performance of mechanical tools. In the work of loading and hauling material overburden, the tire's lifetime will be influenced by external and internal conditions. External conditions affecting tire lifetime are road conditions, payload loads that the unit must accept, unit speed and tyre maintenance. While the external condition affecting tire lifetime is the manufacturing tire of the factory that designed it such as Ton Kilometer Per Hour (TKPH) standard used for field operational application. So that the selection of proper tires becomes an important factor for the operation to run smoothly. To minimize the risk of tyre damage, it is necessary to evaluate the performance of tyres by conducting analysis of Key Performance Indicator (KPI) parameters and the ratio of Ton kilometers Per Hour (TKPH) of rating and actual. The results showed that the road condition of the mines that were not well maintenance affected the tire lifetime.

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