motor exhaust
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2021 ◽  
Vol 7 (1) ◽  
pp. 21-28
Author(s):  
I Made Adiswara Wirama ◽  
I Made Aris Dharma Putra ◽  
I Made Weda Maharta Putra ◽  
Anak Agung Ngurah Made Narottama ◽  
Anak Agung Ngurah Gde Sapteka

Sistem pengendalian suhu ruangan secara otomatis diyakini mampu memberikan penghematan tanpa mengurangi performansinya. Pengendalian suhu ruangan dilakukan dengan mengatur kecepatan putaran motor exhaust fan dengan SCR speed controller. Hal ini sangat diperlukan untuk menghemat pengeluaran listrik. Dalam mengkoneksikan antara sensor suhu dengan SCR speed controller diperlukan mikrokontroler Arduino Uno sebagai pengolah data keluaran dari sensor sehingga dapat mengendalikan speed controller 1 dengan keluaran tegangan 180 volt dan speed controller 2 dengan keluaran tegangan 200 volt. Alat ini cocok digunakan untuk mengatur suhu di ruangan tertutup agar selalu stabil. An automated room temperature control is a way to do savings without reducing its performance. The temperature control is done by adjusting the rotation speed of the exhaust fan motor using an SCR speed controller. This mechanism will give a great advantage on power usage reduction. To connect the temperature sensor with the SCR speed controller, an Arduino Uno microcontroller is used as a processor of the outputs from the sensor so it can control the 1st speed controller with 180 Volt and the 2nd speed controller with 200 Volt. This tool is suitable for maintaining the temperature of a closed room temperature.


FirePhysChem ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 21-26
Author(s):  
Jianhua Yi ◽  
Zhihua Sun ◽  
Changjian Wang ◽  
Yi Xu ◽  
Zhao Qin ◽  
...  

2020 ◽  
Vol 71 (2) ◽  
pp. 51-54
Author(s):  
Romuald Olszański ◽  
Elżbieta Mamet-Ossowska

Abstract The paper describes the case of a military diver who suffered from a complicated poisoning caused by hydrocarbons contained in his breathing air. The hydrocarbons came from a malfunctioning compressor which was used to fill the diving cylinders; the compressor sucked in the exhaust gases of its own motor. Exhaust gas poisoning was further complicated by hypoxia and hypercapnia as the diver spat out the mouthpiece and started to breathe from inside the suit. This resulted in a loss of consciousness. The diver was extracted to the surface and was given oxygen to breathe. The course of treatment was successful. On the same day, symptoms of exhaust gas poisoning occurred in several divers using cylinders filled with the same compressor.


2019 ◽  
Vol 11 (1) ◽  
pp. 29-33
Author(s):  
Nadia Alfitri ◽  
Amril Amril ◽  
Reno Fajar Siddiq
Keyword(s):  

Cengkeh merupakan salah satu rempah yang digunakan sebagai bahan baku industri rokok, farmasi, kosmetik dan rempah-rempah bahan makanan. Saat musim hujan, produksi cengkeh kering menurun, karena petani mengalami kesulitan dalam mengeringkan hasil panen cengkeh mereka. Tujuan dari pembuatan alat ini adalah menggantikan peran pengeringan secara alami dengan menggunakan mesin buatan dan mengoptimalkan waktu serta tidak memerlukan lahan yang luas untuk proses pengeringan. Pembuatan alat menggunakan sistem otomatis untuk megendalikan kondisi suhu di dalam box pengering dengan metode algoritma fuzzy logic. Untuk pengeringan yang optimal suhu yang digunakan yaitu antara 440C sampai 470C dengan setpoin 450C. Untuk mendapatkan hasil yang sama dengan pengeringan tradisional, waktu yang dibutuhkan untuk alat mengeringkan cengkeh adalah ± 7 jam tanpa henti. Penggunaan algoritma logika fuzzy yang di terapkan pada alat, dapat mempertahankan kondisi suhu normal yang kita inginkan dengan kecepatan motor exhaust fan sesuai dengan menurunan dan kenaikan suhu. Sehingga alat dapat mengeringkan cengkeh secara optimal.


2019 ◽  
Vol 90 (8) ◽  
pp. 854-860 ◽  
Author(s):  
Anne E Visser ◽  
Fabrizio D'Ovidio ◽  
Susan Peters ◽  
Roel CH Vermeulen ◽  
Ettore Beghi ◽  
...  

ObjectiveTo investigate whether exposure to particulates and combustion products may explain the association between certain occupations and amyotrophic lateral sclerosis (ALS) risk in a large, multicentre, population-based, case–control study, based on full job histories, using job-exposure matrices, with detailed information on possible confounders.MethodsPopulation-based patients with ALS and controls were recruited from five registries in the Netherlands, Ireland and Italy. Demographics and data regarding educational level, smoking, alcohol habits and lifetime occupational history were obtained using a validated questionnaire. Using job-exposure matrices, we assessed occupational exposure to silica, asbestos, organic dust, contact with animals or fresh animal products, endotoxins, polycyclic aromatic hydrocarbons and diesel motor exhaust. Multivariate logistic regression models adjusting for confounding factors were used to determine the association between these exposures and ALS risk.ResultsWe included 1557 patients and 2922 controls. Associations were positive for all seven occupational exposures (ORs ranging from 1.13 to 1.73 for high vs never exposed), and significant on the continuous scale for silica, organic dust and diesel motor exhaust (p values for trend ≤0.03). Additional analyses, adding an exposure (one at a time) to the model in the single exposure analysis, revealed a stable OR for silica. We found similar results when patients with a C9orf72 mutation were excluded.ConclusionIn a large, multicentre study, using harmonised methodology to objectively quantify occupational exposure to particulates and combustion products, we found an association between ALS risk and exposure to silica, independent of the other occupational exposures studied.


JURNAL TEKNIK ◽  
2018 ◽  
Vol 12 (2) ◽  
pp. 85-96
Author(s):  
Elham Prasetyo Wibowo ◽  
Elvira Zondra ◽  
Usaha Situmeang

                                                                                                                                      ABSTRAK              Exhaust fan adalah peralatan berupa sudu-sudu yang berputar dan memanfaatkan gaya sentrifugal untuk membuang exhaust gas hasil pembakaran bahan bakar solar engine diesel pada saat dilakukan tes pembebanan penuh. Dengan exhaust fan, gas karbondioksida yang dihasilkan oleh engine diesel memungkinkan untuk dibuang dengan cepat sehingga tidak memenuhi ruangan dan membahayakan bagi setiap karyawan. Pengoperasian exhaust fan dilakukan sesuai jadwal pengetesan engine. Exhaust fan tersebut digerakkan oleh motor induksi 3 phasa 30 kW dengan putaran nominal secara konstan. Pada saat pengetesan engine dengan nilai aliran gas buang yang rendah, exhaust fan tetap dioperasikan dengan kecepatan nominal. Operasional motor exhaust fan dengan kecepatan konstan seperti ini akan mengakibatkan konsumsi daya listrik yang relatif tinggi dari pada motor dengan kecepatan berubah-ubah sesuai kebutuhan. Sebagai pertimbangan hasil perhitungan untuk engine C 18 Caterpillar kapasitas 831 hp yang sebelumya  membutuhkan operasional exhaust fan dengan daya 24,7927 kW nilai sama untuk semua model engine, setelah penggunaan VSD dapat dikurangi sebesar 14,35 %  menjadi 21,2343 kW saja. Penelitian ini bertujuan mendapatkan probabilitas hubungan antara konsumsi energi listrik, frekuensi pada variable speed drive, putaran motor induksi dan nilai aliran udara pada cerobong exhaust fan. Nilai aliran udara exhaust fan tersebut akan disesuaikan dengan nilai aliran gas pembakaran yang dihasilkan oleh engine. Analisa optimasi motor exhaust fan ini sedianya akan menggunakan Matematic Analysis dan simulasi menggunakan simulink matlab sehingga diharapkan ada solusi untuk melakukan penghematan terhadap konsumsi daya motor, kemudian bisa diterapkan dalam semua pengoperasian motor yang ada di perusahaan.   Kata kunci : variable speed drive, motor induksi, exhaust fan                                                                                                                                            ABSTRACT              The exhaust fan is a rotary blade device which produces centrifugal force to remove exhaust gas from diesel fuel combustion during a full load test. With exhaust fans, the carbondioxide gases that generated by the diesel engine allows to be disposed quickly so that it does not fill the room and harm to every employee. The operation of  exhaust fan is carried out according to the engine test schedule. The exhaust fan is driven by a 3 phase induction motor of  30 kW with constant rotation. When testing the engine with a low Exhaust Gas flow value, the exhaust fan remains operated at rated speed. Operational exhaust fan with a constant speed like this will result in relatively high power consumption of the motor with the speed of change as needed. Considering the calculation results for C 18 engine Caterpillar capacity of 831 hp which previously required operational exhaust fan with 24,7927 kW of equal value for all engine models, after the use of VSD can be reduced by 14.35% to 21.2343 kW only. This study aims to obtain the probability of relationship between electrical energy consumption, frequency on the variable speed drive, induction motor rotation and the value of air flow in the exhaust fan chimney. The value of the exhaust fan air flow will be adjusted to the combustion gas flow value generated by the engine. The optimization analysis of this motor exhaust fan will be using Matematic Analysis and simulation using matlab simulink so it is expected there is a solution to make savings to motor power consumption, then it can be applied in all the motor operation in the company.   Keywords: variable speed drive, induction motor, exhaust fan


Measurement ◽  
2018 ◽  
Vol 122 ◽  
pp. 312-319 ◽  
Author(s):  
Nadir Yilmaz ◽  
Francisco Vigil ◽  
Jonathan Height ◽  
Burl Donaldson ◽  
Walt Gill

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