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KAJIAN TEKNIS PENGGUNAAN BAHAN BAKAR DME (DIMETHYL ETHER) MURNI SEBAGAI SUBTITUSI LPG ( ELPIJI) PADA BURNER INDUSTRI KECIL Emi Yuliarita; Cahyo Setyo Wibowo; Dimitri Rulianto
Lembaran Publikasi Minyak dan Gas Bumi Vol. 49 No. 2 (2015): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Dimethylether (DME) merupakan salah satu sumber energy alternatif yang diharapkan dapatmengantikan LPG sebagai bahan bakar khususnya pada sektor industri kecil yang menggunakanburner berbahan bakar LPG. Hal ini di dukung oleh karakteristik yang dimiliki bahan bakar DMEyang hamper setara dengan LPG.
Pengaruh Pemakaian Minyak Lumas pada Komponen Mesin Diesel Melalui Uji Jalan Rona Malam K; Dimitri Rulianto
Lembaran Publikasi Minyak dan Gas Bumi Vol. 41 No. 3 (2007): LPMGB
Publisher : BBPMGB LEMIGAS

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Abstract

Untuk mengetahui penetapan waktu penggantian (drain interval) yang paling efektif dan ekonomis, serta untuk menganalisis problem gangguan serius dan kerusakan pada mesin kendaraan perlu dilakukan uji jalan dengan cara menganalisis karakteristik fisika-kimia minyak lumas baru dan minyak lumas bekas serta rating terhadap komponen mesin. Pada makalah ini disajikan hasilanalisis rating terhadap komponen kendaraan mesin diesel yang dipakai pada uji jalan setelah menempuh jarak 20.000 kilometer.Penelitian ini dilakukan dengan cara: merekondisikan mesin dengan mengganti beberapa komponen utama mesin dan melakukan penyetelan sesuai spesifikasi yang direkomendasikan pabrik pembuatnya; melakukan running-in sejauh + 1000 km; dan melakukan uji jalan dengan target pelaksanaan mencapai jarak tempuh 20.000 km, yang dilakukan terhadap 4 percontoh minyak lumas mesin diesel dengan 6 kendaraan uji dan kondisi operasi normal ± 300 km per hari meliputi route dalam dan luar kota. Berdasarkan hasil evaluasi rating beberapa komponen mesin yang terdapat pada 6 (enam) kendaraan uji, bahwa 4 (empat) jenis minyak lumas mesin diesel SAE 15W40, API CH-4 yang digunakan dapat digunakan sampai jarak 20.000 km.
Analysis On Dimethyl Ether (Dme) Characteristics As A Liquid Petroleum Gas (Lpg) Fuel Substitution For Household Stove Cahyo Setyo Wibowo; Riesta Anggarani; Dimitri Rulianto; Lies Aisyah
Scientific Contributions Oil and Gas Vol 36 No 3 (2013)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.36.3.768

Abstract

Increasing growth of population will lead to increasing energy needs; therefore it is necessary to find alternative energy other than fossil fuel. Currently, energy sources in Indonesia are mainly derived from oil and natural gas such as LPG. Starting from 2008, LPG demand increased significantly for households and small industries as a result of government policy on conversion of kerosene to LPG. To meet this demand, the government imports LPG up to 2 million tons per year. In order to overcome LPG crisis, an alternative energy is required to be developed without changing either the distribution system, technical or commercial used. An option among others is dimethyl ether (DME) derived from low calori’s coal gasification. In this research analysis characteristics of DME is compared to LPG (as fuel reference) used. The test methods carried out refers to the specification of LPG issued by Directorate General of Oil and Gas. Based on the results, it shows that the characteristics of the fuel LPG mixed with DME 20% and 50% have some good results particularly on physical and chemical properties, stability and homogeneous of gas. Hence, LPG mixed DME 20% and 50% can be used as a substitute fuel for household stove.
Liftoff of Propane - Air Diffusion Flames By Axis Symmetric Co-flow Air Injection I Made K Dhiputra; Harinaldi Harinaldi; NK Caturwati; Dimitri Rulianto
Scientific Contributions Oil and Gas Vol 32 No 3 (2009)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/SCOG.32.3.853

Abstract

Combustion of gas with diffusion system is widely used in many residential gas appliances like stove, engine furnaces and industrial furnaces. Phenomenon of lifted flame is often happened at diffusion flame where the stream of fuel and air into combustor flow separately. Hence the combustion process needs time so that mixing of air and fuel reach the condition ready for burnt. This condition make the burner tip protected from high thermal load and more safe to operate. In this paper, propane was ejected into quiescence air through nozzle having 1.8 mm holes diameter. Fuel flow rate was increased until liftoff conditions exceed; hereinafter flow rate of fuel was made constant at 69 ml/s and air was ejected around of fuel with axis symmetric flow. Liftoff behavior of diffusion flames was investigated for various air flow rate: 17.9 ml/s – 89.9 ml/s. Lifted distance decreased from 130 mm to 90 mm when air was injected with flow rate of 19.1 ml/s, however, it increased to 100 mm when air flow rate increased to 35.9 ml/s. Cold-flow simulation showed the moderate air flow rate give a faster density degradation at axial line compared to larger air flow rate. It means moderate flow rate of air support a better air-fuel mixing than faster one.