Exergoeconomic and exergoenvironmental comparison of diesel-biodiesel blends in a direct injection engine at variable loads

Cavalcanti, Eduardo José Cidade; Carvalho, Mónica; Ochoa, Álvaro

doi:10.1016/j.enconman.2018.12.113

Cited by 85 publications

(30 citation statements)

References 66 publications

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“…Karthikeyan et al [14] compared three blends of rice bran biodiesel with pure diesel using energy and exergy analysis. As reported by Cavalcanti et al [12], engine at higher load with biodiesel blends operates with higher exergetic efficiency. Rakopoulos and Giakoumis [15] used computer analysis to study the energy and exergy performance of a diesel engine operating under transient engine operating conditions, and they revealed how exergy properties vary with different operating parameters.…”

Section: Introductionsupporting

confidence: 51%

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Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin

Odibi

Babaie

Zare

et al. 2019

Energy Conversion and Management

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This study uses the first and second laws of thermodynamics to investigate the effect of oxygenated fuels on the quality and quantity of energy in a turbo-charged, common-rail sixcylinder diesel engine. This work was performed using a range of fuel oxygen content based on diesel, waste cooking biodiesel, and a triacetin. The experimental engine performance and emission data was collected at 12 engine operating modes. Energy and exergy parameters were calculated, and results showed that the use of oxygenated fuels can improve the thermal efficiency leading to lower exhaust energy loss. Waste cooking biodiesel (B100) exhibited the lowest exhaust loss fraction and highest thermal efficiency (up to 6% higher than diesel). Considering the exergy analysis, lower exhaust temperatures obtained with oxygenated fuels resulted in lower exhaust exergy loss (down to 80%) and higher exergetic efficiency (up to 10%). Since the investigated fuels were oxygenated, this study used the oxygen ratio (OR) instead of the equivalence ratio to provide a better understanding of the concept. The OR has increased with decreasing engine load and increasing engine speed. Increasing the OR decreased the fuel exergy, exhaust exergy and destruction efficiency. With the use of B100, there was a very high exergy destruction (up to 55%), which was seen to decrease with the addition of triacetin (down to 29%).

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Section: Introductionsupporting

confidence: 51%

“…With the rationale of better understanding the performance and sensitivity of various operating parameters of internal combustion engines when operating with biodiesel, some studies have considered the use of energy and exergy analysis to evaluate engine performance [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin

Odibi

Babaie

Zare

et al. 2019

Energy Conversion and Management

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“…Montazerinejad et al [31] developed thermodynamic, exergoeconomic, and exergoenvironmental investigations for a novel solar-based trigeneration system. Cavalcanti et al [32] developed exergoeconomic and exergoenvironmental comparisons for a diesel-generator engine fueled with different diesel–biodiesel blends and found that the addition of biodiesel reduced the specific environmental impact of electricity. The same reduction was observed by Hong et al [33] for a supercritical coal-fired power plant with a purification system.…”

Section: Introductionmentioning

confidence: 99%

Energy, exergy and exergoenvironmental analyses of a sugarcane bagasse power cogeneration system

Cavalcanti

Carvalho

Silva

2020

Energy Conversion and Management

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Highlights A cogeneration power plant fueled with sugarcane bagasse was evaluated. Energy, exergy and exergoenvironmental analyses were developed. The environmental impact of sugarcane bagasse is 6.73 mPt/kg. The predominant emissions were sulfur dioxide. The specific environmental impact of electricity is 6.023 mPt/MJ.

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“…Also, advanced sustainability assessment tools such as exergoeconomic and exergoenvironment could be explored as an effective tool that would enhance the performance and the cost-effectiveness and would minimize the environmental effects of the system being examined. 4 Few studies by Aghbashlo M et al, 5 Aghbashlo M et al, 6 Lourenco A.B and Carvalho M 7 and Eduardo J.C. Cavalcanti et al 8 confirm the effectiveness of these tools.…”

Section: Introductionmentioning

confidence: 94%

A comparative assessment on the effect of 1-propanol and 1-hexanol as oxygenated additive with diesel/biodiesel blends on single cylinder diesel engine characteristics

Jayapal

Radhakrishnan

2021

Energy & Environment

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Recovery of energy from waste is appealing as it meets the energy demand and minimize the problems associated with waste management. Biodiesel derived from waste cooking oil was used in this study along with 1-propanol and 1-hexanol to make a comparative assessment of the alcohol addition on different diesel engine characteristics. Experimental trials were carried out by utilizing two ternary blends with 20% by volume of higher alcohols (propanol & hexanol), 30% by volume of biodiesel and 50% by volume of diesel. Later, the results were compared with binary blend of 50% by volume of diesel and 50% by volume of biodiesel (D50B50), pure diesel (D100) and biodiesel (B100). Results divulge that ignition delay period got longer for both Pr20 blend and HX20 blend which resulted in a 2% and 1% increase in peak cylinder pressure and 26% and 15% increase in peak heat release rate respectively against D50B50 blend operation. In comparison with the binary blend, the engine brake thermal efficiency improved by 3% and deteriorated by 2% against hexanol and propanol blend respectively. The NOx emission aggravated with ternary blends, nearly 8% higher NOx emission was observed for propanol blend when compared to hexanol blend. Both smoke opacity and carbon monoxide emission reduced, while unburnt hydrocarbon emission was on the higher side with the introduction of alcohol. It is concluded from the observations that the HX20 blend was found to be optimal in terms of improved engine performance and emission characteristics.

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Exergoeconomic and exergoenvironmental comparison of diesel-biodiesel blends in a direct injection engine at variable loads

Cited by 85 publications

References 66 publications

Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin

Exergy analysis of a diesel engine with waste cooking biodiesel and triacetin

Energy, exergy and exergoenvironmental analyses of a sugarcane bagasse power cogeneration system

A comparative assessment on the effect of 1-propanol and 1-hexanol as oxygenated additive with diesel/biodiesel blends on single cylinder diesel engine characteristics

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