Performance, Emission Characteristics of Dual Fuel Engine Fuelled with Brown Briquette Biomass and Rice bran Oil Biodiesel

2020 ◽  
Vol 12 (4) ◽  
Author(s):  
K.M. Nataraja ◽  
N.R. Banapurmath ◽  
V.S. Yaliwal ◽  
Nandish Mathad
Keyword(s):  
Rice Bran ◽  
Rice Bran Oil ◽  
Agricultural Waste ◽  
Dual Fuel ◽  
Producer Gas ◽  
Fuel Saving ◽  
Engine Operation ◽  
Downdraft Gasifier ◽  
Pilot Fuel ◽  
Operation Results

In this work agricultural waste-based coconut biomass and compressed agricultural waste derived from brown briquette were used for generation of gas in a downdraft gasifier. Its subsequent combustion takes place in a modified diesel engine using rice bran oil (RiOME) biodiesel injected in bi-fuel mode. For the injected pilot fuel, producer gas operation with coconut biomass derived fuel has improved liquid fuel saving. Downdraft gasifier was integrated with four stroke DI water cooled 5.2 kW CI engine at 1500 rpm speed. Experimentation results showed that for the gasifierengine system coconut biomass derived gas with diesel based dual fuel operation results in 9.05% higher BTE. RiOME producer gas (CNS) operation showed 16.1% decrease in EGT and 12.1% reduction in NOx emission compared to diesel based dual fuel operation. NOx emissions for the RiOME based engine operation were found to be lower than the diesel based operation. However, the smoke, HC and CO emissions were higher. Diesel fuel saving about 56% was achieved by diesel and producer gas (CNS) dual fuel operation and 100% biofuel utilization in RiOME -producer gas bi-fuel mode of operation was achieved. Further, heat release rates and cylinder pressure for RiOME producer gas (CNS) was marginally lesser than diesel operation.

Improving the Performance of a Biogas Powered Dual Fuel Diesel Engine Using Emulsified Rice Bran Biodiesel as Pilot Fuel Through Adjustment of Compression Ratio and Injection Timing

2015 ◽  
Vol 137 (9) ◽  
Author(s):  
Bhaskor J. Bora ◽  
Ujjwal K. Saha
Keyword(s):  
Diesel Engine ◽  
Rice Bran ◽  
Compression Ratio ◽  
Droplet Diameter ◽  
Dual Fuel ◽  
Injection Timing ◽  
Two Phase ◽  
Water Emulsion ◽  
Hydrophilic Lipophilic Balance ◽  
Pilot Fuel

Emulsification is one of the proven techniques to control the pollutants of the diesel engines. The present work attempts to explore the effect of injection timing (IT) of pilot fuel and compression ratio (CR) for an emulsified rice bran biodiesel (RBB)–biogas powered dual fuel diesel engine. A two-phase stable water emulsion of rice bran methyl ester has been prepared by optimizing the factors such as water content (5% and 10%), surfactants (3%), and hydrophilic lipophilic balance (HLB) values (4.3, 5, and 6). The stability of the emulsions is determined on the basis of measurement of mean droplet diameter and stability test. For experimentation, a 3.5 kW single cylinder, direct injection (DI), water cooled, variable CR diesel engine is converted into a biogas run dual fuel diesel engine by connecting a venturi gas mixer at the inlet manifold. A set of combinations comprising CRs of 18, 17.5, and 17, and ITs of 23 deg, 26 deg, 29 deg, and 32 deg before top dead centers (BTDC) at different loading conditions are considered. The investigation demonstrates a maximum brake thermal efficiency (BTE) of 23.62% along with a liquid fuel replacement of 82.22% at pilot fuel IT of 29 deg BTDC and CR of 18. For the same combination, CO and HC emissions are found to be least in all the test cases.

scholarly journals Pemanfaatan gasifikasi batubara untuk unit pengeringan teh

2018 ◽  
Vol 5 (2) ◽  
pp. 443
Author(s):  
Ari Susandy Sanjaya ◽  
S Suhartono ◽  
Herri Susanto
Keyword(s):  
Coal Gasification ◽  
Fixed Bed ◽  
Calorific Value ◽  
Diesel Oil ◽  
Fuel Oil ◽  
Dual Fuel ◽  
Processing Unit ◽  
Producer Gas ◽  
Downdraft Gasifier ◽  
Gasification Process

Coal gasification utilization for tea drying unit. Anticipating the rise of fuel oil, the management of a tea plantation and drying plant has considered to substitute its oil consumption with producer gas (gaseous fuel obtained from gasification process). A tea drying unit normally consumes 70 L/h of industrial diesel oil and is operated 10 hours per day. The gasification unit consisted of a down draft fixed bed gasifier (designed capacity of about 100 kg/h), gas cooling and cleaning systems. The gas producer was delivered to the tea processing unit and burned to heat the drying oil: Low calorific value coal (4500 kcal/kg) and wood waste (4000 kcal/kg) have been used as fuel. The gasification unit could be operated as long as 8 hours without refueled since the coal hopper on the toppart of gasifier has a capacity of 1000 kg. Sometimes, the gasification process must be stopped before coal completely consumed due to ash melting inside the gasifier. Combustion of producer gas produced a pale-blue flame, probably due to a lower calorific value of the producer gas or too much excess air. Temperature of heating-air heated by combustion of this producer gas was only up to 96 oC. To achieve the target temperature of 102 oC, a small oil burner must he operated at a rate ofabout 15 L/h. Thus the oil replacement was about 78%.Keywords:  Fuel oil, Producer gas, Downdraft gasifier, Dual fuel, Calorific value, Burner. AbstrakKenaikan harga bahan bakar minyak untuk industri pada awal 2006 telah mendorong berbagai pemikiran dan upaya pemanfaatan bahan bakar alternatif. Sebuah unit gasifikasi telah dipasang di pabrik teh sebagai penyedia bahan bakar alternatif. Unit gasifikasi tersebut terdiri dari gasifier, pendingin, pembersih gas, dan blower. Unit gasifikasi ini ditargetkan untuk dapat menggantikan konsumsi minyak bakar 70 L/jam. Gasifier dirancang untuk kapasitas 120 kg/jam batubara, dan memiliki spesifikasi sebagai berikut: downdraft gasifier; diameter tenggorokan 40 cm, diameter zona reduksi 80 cm. Bunker di bagian atas gasifier memiliki kapasitas sekitar 1000 kg batubara agar gasifier dapat dioperasikan selama 8 jam tanpa pengisian-ulang. Bahan baku gasifikasi yang telah diuji-coba adalah batuhara kalori rendah (4500 kcal/kg) dan limbah kayu (4000 kcal/kg). Gas produser (hasil gasifikasi) dibakar pada burner untuk memanaskan udara pengering teh sampai temperatur target 102 oC. Pembakaran gas produser ternyata menghasilkan api biru pucat yang mungkin disebabkan oleh rendahnya kalor bakar gas dan tingginya udara-lebih. Temperatur udara pengering hasil pemanasan dengan api gas produser hanya mencapai 96 oC. Dan untuk mencapai temperatur udara pengering 102 oC, burner gas prod user harus dibantu dengan burner minyak 15 L/jam. Jadi operasi dual fued ini dapat memberi penghematan minyak bakar 78%.Kata kunci: Minyak bakar, Gas produser, Downdraft gasifier, Dual fuel, Kalor bakar, Burner. 

Investigations on operation of CI engine using producer gas and rice bran oil in mixed fuel mode

2007 ◽  
Vol 32 (9) ◽  
pp. 1565-1580 ◽  
Author(s):  
R.N. Singh ◽  
S.P. Singh ◽  
B.S. Pathak
Keyword(s):  
Rice Bran ◽  
Rice Bran Oil ◽  
Producer Gas ◽  
Mixed Fuel ◽  
Ci Engine

Extent of replacement of methyl ester of rice bran oil by producer gas in CI engine

2007 ◽  
Vol 31 (15) ◽  
pp. 1545-1555 ◽  
Author(s):  
R. N. Singh ◽  
S. P. Singh ◽  
B. S. Pathak
Keyword(s):  
Methyl Ester ◽  
Rice Bran ◽  
Rice Bran Oil ◽  
Producer Gas ◽  
Ci Engine

Estimating the Theoretical Performance Limits of a Biogas Powered Dual Fuel Diesel Engine Using Emulsified Rice Bran Biodiesel as Pilot Fuel

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Bhaskor J. Bora ◽  
Ujjwal K. Saha
Keyword(s):  
Diesel Engine ◽  
Rice Bran ◽  
Entropy Generation Rate ◽  
Dual Fuel ◽  
Injection Timing ◽  
Exhaust Gas ◽  
Emission Analysis ◽  
Water Emulsion ◽  
Energy And Exergy ◽  
Pilot Fuel

The present study is an attempt to estimate the energy and the exergy potential of a biogas run dual fuel diesel engine using emulsified rice bran biodiesel (RBB) as pilot fuel at varying compression ratio (CR) and injection timing (IT). The objective is to arrive at an optimum setting of the engine based on dual fuel characteristics using energy and exergy analysis. The pilot fuel considered for this study is a two-phase stable water emulsion of RBB having water content (5%), surfactants (3%), and hydrophilic lipophilic balance value of 6. For experimentation, a 3.5 kW single cylinder, direct injection (DI), natural aspirated water-cooled, variable CR (VCR) diesel engine is converted into a dual fuel engine. Experiments are conducted for 12 different combinations of CR of 18, 17.5, and 17 and IT of 23 deg, 26 deg, 29 deg, and 32 deg bottom top dead center (BTDC) at full load conditions of brake mean effective pressure (BMEP) of 4.24 bar. The parameters analyzed are the energy and exergy potential of fuel input, shaft work, cooling water, exhaust gas, exergy destruction, peak cylinder pressure (PCP), peak heat release rate (PHRR), brake thermal efficiency (BTE), exergy efficiency, exhaust gas temperature (EGT), entropy generation rate, and emission analysis. The results indicate that the combination of CR = 18 and IT = 29 deg BTDC gives a better thermodynamic performance for this particular range of the operating parameters for a raw biogas run dual fuel diesel engine using emulsified RBB as pilot fuel.

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