4 research outputs found
Pengaruh Peningkatan Fraksi Hampa Terhadap Penurunan Tekanan Waterhammer Akibat Penutupan Katup Secara Tiba â Tiba Pada Pipa Horisontal
No full textWaterhammer phenomenon, single - phase as well as two - phase flow through pipes, valves, pump instalations, and other instruments are not expected, because it can destroy the system. The magnitude of waterhammer pressure rise effect motivates the author to study effect of void fraction on the Waterhammer pressure rise.
The materials used in the research are liquids whose kinematic viscosities are 1) = 0,8342 cSt, U = 2,2522 cSt, U = 2,6346 cSt, U = 2,9027 cSt, U = 3,2802 cSt and air from a compressor. The instruments used in the research are a PVC pipe of 19 mm (3/4 inch) diameter, flexiglass of 19 mm (3/4 inch) diameter, a membrane, strain gage, strain amplifier, analog to digital converter, solenoid valve, which are assembled to waterhammer apparatus.
The result of the research is that void fraction can effect waterhammer pressure rise.
Keywords : Waterhammer, two phase-flow, valv
STUDI FENOMENA SLUGGING SEBAGAI INISIASI WATER HAMMER PADA PROSES KONDENSASI UAP DI DALAM PIPA HORISONTAL
No full textSlugging phenomenon that defined as initiating the water hammer is very interesting study because it has strategic impact on safety factor in industry system and equipment i.e. . pressurized water reactor, heat exchanger, steam or gas transportation in chamical industry, air conditioning, etc. The objective of this research is to investigate the slugging as initiating water hammer phenomena through non directly cantact steam condensing experimental study in a horizontal pipe.
The experiment apparatus used in present experimental study consisted of an inner annulus pipe made from copper (din = 17.2 mm, do = 19 mm) with a length of 1.8 m. The outer pipe annulus was a galvanized iron pipe (din = 108.3 mm, do = 114. 3 mm) with a length of 1.6 m. Tested liquid was water. In the experiment, the water was heated using a boiler to generate steam which was then flowed and condensed inside the annulus pipe to form a steam-condensate two-phase flow in horizontal pipe. On the other hand, the water was used as a coolant in the outer of annulus pipe. Thermocouples type K 36 TT OMEGA with chromel (+) and alumel (-) materials were used as temperature sensors, to detect the spread of temperature in circumferential or axial direction along the pipe. The measurement ranged from -50 to 260 oC, with an accuracy of 0.01 °C. A data logger of RX 40 serial (OMRON, 20 Channels) was used to record the temperature data with a sampling rate of 5 Hz. The pressure drop axial the test is directly measured using a differential pressure tranducer (validyne, accuracy of ±0.25%) with a sampling rate of 1.31 kHz. Data of Temperature and differential pressure fluctuations on the steam condensation in a horizontal pipe was analyzed using statistical analysis.
For the static pressure Ps=7,5 kPa dan the temperature T = 119,7 °C, the results are fo 1). Flow pattern area of non slugging (stratified and wavy flow), transition (wavy-slug flow), and slugging (slug and large-slug). The flow pattern of slug and large-slug are defined as initiating water hammer phenomena, 2). Transition area range of wavy-slug flow pattern are from �co=1�10-1 kg/s to �co= 6�10-1 kg/s for �st=6�10-3 kg/s to �st=7.5�10-3 kg/s, and �co< 3�10-1 kg/s for �st=8�10-3 kg/s to �st=9�10-3 kg/s. These data are very important to develop the database for input the early warning system design in a safety of two-phase flow installation piping system
Analisis Lalu Lintas Harian Rata – Rata (LHR) dalam Menghindari Kecelakaan
No full textPT. Jasa Marga (Persero) Tbk is one of the Toll Road Service Provider Operators in Indonesia. Jasa Marga has been trusted to be responsible for toll road construction in Indonesia. With the large number of road growth, there will also be more toll roads to connect several regions in Indonesia. The purpose of this study is to determine the Average Daily Traffic (LHR) of the accident rate, to solve the problem, the author used 2 (two) methods, the first method of collecting data in the form of field data (field research) and documents review (based on the data from the company). The second method was data analysis with the basic calculation of Accident Rate. The results from the analysis show there is a contribution from the Average Daily Traffic (LHR) (X) of 27.04% to the accident rate (Jakarta - Cikampek Toll Road) (Y) and the rest 72.96% is the influence of other factors besides the Average Daily Traffic average (LHR)
Pembuatan Website TPKK ITS
No full textUntuk mengenal lebih dalam tentang visi mula – mula yang ada pada mereka yang memperjuangkan berdirinya persekutuan TPKK ITS, maka kita tidak dapat terlepas dari persekutuan YPPA Lahai Roi.
YPPA Lahai Roi dimulai tahun 1974 oleh Ibu Dian Anggraini dengan mengajak beberapa mahasiswa Universitas Airlangga untuk mengikuti Pemahaman Alkitab (PA) di rumahnya. Pada perkembangan selanjutnya seorang mahasiswa ITS, Mas Indarto (sekarang staf dosen FTSP ITS) ikut juga dalam kelompok tersebut. Mas Indarto pun mengajak beberapa mahasiswa Kristen ITS diajak juga dalam persekutuan yang diadakan tiap hari Rabu.
Mengingat persekutuan tersebut belum dapat menjangkau mahasiswa ITS, maka mereka memperjuangkan ijin untuk diadakannya persekutuan mahasiswa di dalam kampus ITS, pada saat itu di ITS hanya ada PPHB (Panitia Peringatan Hari Besar) yang hanya dapat mengadakan pembinaan dengan penyelenggaraan peringatan hari besar.
Akhirnya kegiatan persekutuan dimulai di ITS pada tahun 1986 oleh Nur Husodo, dkk dan kemudian resmi diakui dengan nama TEAM PEMBINA KEROHANIAN KRISTEN (TPKK) pada tahun 1987. Semenjak itulah Persekutuan Mahasiswa Kristen (PMK) mengadakan kebaktian Jumat sampai hari ini.
Pada saat ini TPKK ITS ingin membuat sebuah website yang dapat memudahkan dalam mengelola data, baik mahasiswa, dosen, maupun alumni. Website ini menggunakan framework Laravel, Javascript, dan MYSQL untuk basis data.
Maka dari itu pada kesempatan kerja praktik ini, penulis melakukan pembuatan website untuk TPKK ITS. Pembuatan website dimulai dari awal. Fitur-fitur yang sudah dibuat dan berjalan antara lain: manajemen user, management landing page, dan manajemen data.
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To get to know more about the original vision that existed for those who fought for the establishment of the ITS TPKK alliance, then we cannot be separated from the YPPA Lahai Roi alliance.
YPPA Lahai Roi was started in 1974 by Mrs. Dian Anggraini by inviting several Airlangga University students to take "Pemahaman Alkitab" (PA) at her home. In the next development, an ITS student, Mas Indarto (now an ITS FTSP lecturer) also joined the group. Mas Indarto also invited several ITS Christian students to be invited to join the fellowship which is held every Wednesday.
Considering that the fellowship has not been able to reach ITS students, they are fighting for permission to hold a student fellowship on the ITS campus, at that time at ITS there was only PPHB (Panitia Peringatan Hari Besar) which could only conduct coaching by organizing holiday celebrations.
Finally, fellowship activities were started at ITS in 1986 by Nur Husodo, et al and were later officially recognized as TEAM PEMBINA KEROHANIAN KRISTEN (TPKK) in 1987. Since then Persekutuan Mahasiswa Kristen (PMK) held Friday services until today.
At this time the TPKK ITS wants to create a website that can make it easier to manage data, both students, lecturers, and alumni. This website uses Laravel framework, Javascript, and MYSQL for database.
Therefore, on this practical work opportunity, the author made a website for TPKK ITS. Website creation starts from scratch. The features that have been made and running include: user management, landing page management, and data management
