D ual fuel gas diesel engines
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Project leader: Prof. Ingemar Denbratt PhD student: Zhiqin Jia Project start date : 30 Oct 2012 Project end date: 31 Dec 2014 Program: Energy Efficient Road Vehicles Project funding: 3 638 000 SEK. D ual-fuel gas-Diesel engines. Outline. Background & goals Experimental setup

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D ual fuel gas diesel engines

Project leader: Prof. Ingemar Denbratt

PhD student: Zhiqin Jia

Project start date: 30 Oct 2012

Project end date: 31Dec 2014

Program: Energy Efficient Road Vehicles

Project funding: 3 638 000 SEK

Dual-fuel gas-Diesel engines


Outline
Outline

  • Background & goals

  • Experimental setup

  • Methodology

  • Results

  • Conclusion & futurework


Background
Background

  • Research regarding conventional NG-Diesel dual-fuel combustion have already continuously been conducted several decades (NG mass ratio, total lambda, pilot Diesel quantity influence, etc).

  • Dual-fuel RCCI (ReactivityControlled CompressionIgnition) combustionconcept gives quitepromisingresults (efficiency and emission).

  • There is a need for dual-fuel 3D modelstohelptooptimise dual-fuel experimental hardware and understand moreaboutcombustiondetails.

Roussos G. Papagiannakis, ”Combustion and performancecharacteristicsof a DI diesel engine operating from lowtohighnatural gas supplmentratio”,

SAE Technical Paper:2008-01-1392.

Derek E. Nieman and Rolf D.Reitz, ”Heavy-duty RCCI operation usingnatural gas and diesel”, SAE Technical Paper: 2012-01-0379.


Goals
Goals

  • Investigate dual-fuel (NG/Diesel) RCCI fast combustion on a heavy duty DI Diesel engine.

  • Validate Chalmers developed dual-fuel combustion 3D simulation model with experimental data.


Experimental setup

AVL AMA

NO. NOx. HC. CO. CO2

Experimental setup

Volvo D12C single cylinder engine


Methodology
Methodology

Diesel injectionprofile

(electrical signal)

SOI=64.5 - 74.2 BTDC

SOI =45 BTDC


Results rcci combustion
Results – RCCI combustion

9 bar BMEP, 1500 rpm,

injectionpressure 1000 bar, 41% EGR

4.05 CAD

3.69 CAD

SOI=69.3 BTDC

SOI=45 BTDC


Results rcci combustion1
Results – RCCI combustion

9 bar BMEP, 1200 rpm, injectionpressure 1000 bar, 41% EGR

2.16 – 4.32 CAD

2.88 CAD

SOI=64.5 BTDC

SOI=45 BTDC


Results simulation
Results – simulation


Results simulation1

80

60

350

300

Total heat release rate (J/deg) [bar]

In-cylinder pressure [bar]

Results – simulation

250

40

200

150

20

100

50

0

0

90

70

80

-30

-20

-10

0

10

20

30

40

50

60

-60

-30

-90

0

30

60

90

120

-120

Crank angle [°ATDC]

Crank angle [°ATDC]

500

Exp

Calc

Exp

Calc

450

400


Conclusions future work
Conclusions & Future work

  • It has been shown that RCCI combustion can be obtained and controlled for mixtures of NG and Diesel.

  • It is possibletoreachveryhighthermalefficiency and low NOx and Soot emissions.

  • Resonable goodagreementbetweenthe experimental data and 3D simulation modelhavebeenachieved, butchemicalmechanismneedsto be furtherimproved.

  • We plan to investigate direct injection of both gas and Diesel.



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