Facts about Producer Gas Engine

Sridhar, Gattu; Yarasu, Ravindra Babu

doi:10.5772/13030

Cited by 10 publications

(3 citation statements)

References 15 publications

(28 reference statements)

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“…CNG was not considered. However, comparison of gaseous fuel with liquid fuel in internal combustion has its own constraints as per Sridhar and Yarasu [45]. Combustion characteristics were not investigated in the study.…”

Section: Syngas In Internal Combustion Enginementioning

confidence: 99%

Trends of Syngas as a Fuel in Internal Combustion Engines

Hagos

Aziz

Sulaiman

2014

Advances in Mechanical Engineering

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Syngas from biomass and solid waste is a carbon-neutral fuel believed to be a promising fuel for future engines. It was widely used for spark-ignition engines in the WWII era before being replaced with gasoline. In this paper, the technological development, success, and challenges for application of syngas in power generating plants, the trends of engine technologies, and the potential of this fuel in the current engine technology are highlighted. Products of gasification vary with the variation of input parameters. Therefore, three different syngases selected from the two major gasification product categories are used as case studies. Their fuel properties are compared to those of CNG and hydrogen and the effects on the performance and emissions are studied. Syngases have very low stoichiometric air-fuel ratio; as a result they are not suitable for stoichiometric application. Besides, syngases have higher laminar flame speed as compared to CNG. Therefore, stratification under lean operation should be used in order to keep their performance and emissions of NOx comparable to CNG counterpart. However, late injection stratification leads to injection duration limitation leading to restriction of output power and torque. Therefore, proper optimization of major engine variables should be done in the current engine technology.

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Section: Syngas In Internal Combustion Enginementioning

confidence: 99%

Trends of Syngas as a Fuel in Internal Combustion Engines

Hagos

Aziz

Sulaiman

2014

Advances in Mechanical Engineering

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“…It is obvious that the levels are below the permissible levels for Euro II norms (CO: 0.97 and NOx 1.67 g/MJ) for non-road diesel engines [8]. The low CO level is on account of clean gaseous fuel combustion and low NOx is on account of lower peak flame temperature with producer gas and air mixture [9]. Similarly the value of SO 2 was well below 0.02 g/MJ as biomass contained negligible amount of sulphur.…”

Section: Gaseous Emissionsmentioning

confidence: 99%

Gasification of High and Low Density Crop Residues

Sridhar¹

2013

J. Technol. Innov. Renew. Energy

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Crop residue constitutes a large fraction of biomass particularly in agricultural based economies like India. The most abundantly generated crop residues are paddy husk, paddy straw, coconut shell, cotton stalk and sugar cane trash. It is estimated that the potential of power generation using crop residue is close to 14 GWe in a country like India. Even though the potential is large, the main drawback with crop residue is that it is sparsely distributed and being of low density causes collection and transportation problem. This drawback could be converted into an advantage by adopting distributed power generation technologies. The distributed power generation would fare well in the power range of few hundred kilowatts and the most appropriate technology would be the biomass gasification technology. Among the biomass gasification technologies, the downdraft technology is ideally suited for power generation. The downdraft technology is proven with solid or woody biomass, whereas there are limitations in terms of acceptance of all types of crop residues. In this paper, performance study of two vastly differing crop residues, namely coconut shell and cotton stalk has been discussed; both the feedstocks have been tested in "post-harvested" condition with minimum amount of pre-processing. The performance with cotton stalk was found to be comparable at part load; however at higher load the gas composition deteriorated due to poor material movement within the reactor. This had implication in terms of maximum power generated. There was loss of power to an extent of 12%. The operational issues with post-harvested cotton stalk has been brought out which are based on detailed measurements.

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“…The use of syngas in internal combustion engines is an intermediate step of the current transition from hydrocarbons-based to hydrogen-based fuels, and it could be a useful option to reduce consumptions and emissions. The use of syngas in carburated and port-injection engines has been investigated by several authors [1]- [5], who often experienced a decrease of volumetric efficiency due to the low air-excess-ratio and low fuel density. This brings to low output power for such engines.…”

Section: Introductionmentioning

confidence: 99%

Influence of piston shape and injector geometry on combustion and emission characteristics of syngas in direct-injection spark-ignition engine

et al. 2018

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District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, prolonging the investment return period. The main scope of this paper is to assess the feasibility of using the heat demand -outdoor temperature function for heat demand forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were compared with results from a dynamic heat demand model, previously developed and validated by the authors. The results showed that when only weather change is considered, the margin of error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations.

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Facts about Producer Gas Engine

Cited by 10 publications

References 15 publications

Trends of Syngas as a Fuel in Internal Combustion Engines

Trends of Syngas as a Fuel in Internal Combustion Engines

Gasification of High and Low Density Crop Residues

Influence of piston shape and injector geometry on combustion and emission characteristics of syngas in direct-injection spark-ignition engine

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