Using mixtures of diesel and sunflower oil as fuel for heating purposes in Castilla y Le�n

Alonso, Julio Francisco San José; Sastre, Juan Antonio López; Romero-Ávila, C.; Romero-Ávila, Enrique López; Iglesias, Carlos Izquierdo

doi:10.1016/j.energy.2004.05.021

Cited by 17 publications

(8 citation statements)

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“…The latest is mostly the case of agriculture in regions of Europe, where it is strongly dependent on the subsidies of the Common Agricultural Policy (CAP), and farmers are often more governed by subsidies and prices than by land capabilities (Ambrosio Flores et al, 2008). In this respect, several cases have been documented, such as the sunflower and flax after the reform of the CAP in 1992 to promote industrial crops as an alternative to cereals even on unsuitable land (Herrero and Casterad, 1999;Winter, 2000;Martínez-Casasnovas et al, 2005;San José Alonso et al, 2005), or the more recent policy for vineyard restructuring and conversion (Cots-Folch et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Comparison between land suitability and actual crop distribution in an irrigation district of the Ebro valley (Spain)

Martínez‐Casasnovas¹,

Klaasse²,

Nogues³

et al. 2008

Span. j. agric. res.

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The present research aims to obtain a better insight into the agreement between land evaluation results and actual crop spatial distribution by comparing biophysical land suitability with different crop frequency parameters and with crop rotations derived from multi-year crop maps. The research was carried out in the Flumen district (33,000 ha), which is located in the Ebro Valley (northeast Spain). Land evaluation was based on a 1:100,000 soil survey according to the FAO framework for the main crops in the study area (alfalfa, winter cereals, maize, rice and sunflower). Three crop frequency maps and a crop rotation map, derived from a time-series of Landsat TM and ETM+ images of the period 1993-2000 were used for comparison with land suitability maps. The relationships between the two types of variables were analyzed by means of statistical tests (Pearson chi-square (χ 2 ), Cramer´s V, Gamma and Somers´ D). The results show the existence of a significant (P=0.001) relationship between crops' location and land suitability, except for opportunist crops as sunflower, which is very much influenced by subsidies in the study period. The alfalfa-based rotations show the highest distribution percentages (52%) on the land most suitable for agriculture in the area. The present multitemporal analysis approach offers a more realistic insight than the comparison between a land evaluation map and static year crop map in assessing the degree of agreement of land evaluation recommendations with crops actually cultivated by farmers.Additional key words: biophysical land suitability, crop rotation, land evaluation. ResumenComparación entre la aptitud de las tierras y distribución real de los cultivos en un distrito de riego del valle del Ebro (España)El objetivo de la presente investigación fue analizar la correspondencia entre los resultados de una evaluación de tierras con la distribución real de los cultivos. Para ello la aptitud biofísica de las tierras se comparó con diferentes tipologías de frecuencia de ocurrencia de los cultivos y rotaciones derivadas de mapas de cultivos multitemporales. La investigación fue llevada a cabo en el distrito de riego de Flumen (33.000 ha), localizado en el valle del Ebro (NE España). La evaluación de tierras se basó en una cartografía de suelos 1:100.000, según el esquema FAO, para los principales cultivos presentes en el área de estudio (alfalfa, cereales de invierno, maíz, arroz y girasol). Se utilizaron tres mapas de frecuencia de cultivos y un mapa de rotaciones, derivado de una serie temporal de imágenes Landsat TM y ETM+ del periodo 1993-2000, y se compararon con los mapas de aptitud de tierras para los diferentes cultivos. Se analizó estadísticamente (Pearson χ 2 , Cramer V, Gamma y Somers D) la relación entre los dos tipos de variables. Los resultados muestran la existencia de una relación significativa (P=0,001) entre la localización de los cultivos y la idoneidad de las tierras, excepto de cultivos oportunistas como el girasol, muy influenciado por las subvenciones en el p...

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Section: Introductionmentioning

confidence: 99%

Comparison between land suitability and actual crop distribution in an irrigation district of the Ebro valley (Spain)

Martínez‐Casasnovas¹,

Klaasse²,

Nogues³

et al. 2008

Span. j. agric. res.

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“…Many studies concerning the analysis of the biodiesel production process, the emissions of biodiesel fuelled engines, as well as the overall biofuel production chain are available [10][11][12][13][14][15][16]. However, the raw vegetable rapeseed oil, other than for biodiesel production, can also be directly used to produce heat in industrial or household boilers [17] and especially to produce power by means of diesel engines [18][19][20][21]. In particular, medium-speed diesel units (with power outputs up to 10-15 MW and conversion efficiencies of about 45-47 per cent) require only minor changes to be fuelled by vegetable oils due to their higher viscosity [22].…”

Section: Coccomentioning

confidence: 99%

Life-cycle assessment of bioenergy production systems from oilseed rape crops

Cocco

2011

Proceedings of the Institution of Mechanical Engineers, Part A:

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This article is concerned with a life-cycle assessment (LCA) study of bioenergy production systems based on oilseed rape cultivation. In particular, the study compares the production of biodiesel via transesterification of rapeseed oil, power generation through diesel engines fuelled by raw vegetable oil, and power generation through steam power plants fuelled by the overall aboveground biomass.The results of the LCA study show that bioenergy systems based on power generation perform better than bioenergy systems based on biodiesel production. In particular, the best energy and environmental performance are achieved with steam power plants fuelled by the overall aboveground biomass, which allow a reduction of primary energy consumption by about 75 per cent, the greenhouse impact by about 60 per cent, and the acidification impact by about 52 per cent with respect to conventional power generation plants. A favourable energy and environmental profile can also be achieved by diesel power systems (DPSs) and biodiesel fuel systems (BFSs), especially if the straw is used for power generation. In particular, the primary energy saving is about 58 per cent for DPSs and 72 per cent for BFSs without any straw energy use and about 67 per cent and 74 per cent with straw energy use, respectively. Moreover, these systems allow a reduction of the greenhouse (by about 55-58 per cent) and acidification impacts (from 21 per cent to 38 per cent), except for the BFS without any straw energy use, which increases the acidification impact by about 42 per cent. The study also demonstrates that crop cultivation greatly affects the performance, owing to the use of fuels and fertilizers.

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“…Another strategy widely used by a number of researchers to reduce the viscosity of VOs involves blending them with lower viscosity oil derivatives. In this regard, San José et al used a conventional facility equipped with a mechanical pulverization burner to burn blends of diesel fuel with a range of VOs such as sunflower (SfO) [5,6] soya (SyO) [7,8] and rapeseed oil (RpO) [9]. Using injection pressures between 1x10 6 and 1.4x10 6 Pa and different VO-diesel fuel blends (up to 40 % in VO), combustion performances above 85% and NOx emissions below 53 ppm were attained by the authors.…”

Section: Introductionmentioning

confidence: 99%

“…In this regard, San José et al used a conventional facility equipped with a mechanical pulverization burner to burn blends of diesel fuel with a range of VOs such as sunflower (SfO) [5,6] soya (SyO) [7,8] and rapeseed oil (RpO) [9]. Using injection pressures between 1x10 6 and 1.4x10 6 Pa and different VO-diesel fuel blends (up to 40 % in VO), combustion performances above 85% and NOx emissions below 53 ppm were attained by the authors. In another study [10], the combustion of diesel fuel-animal fat blends, not apt for human consumption, in a residential oil burning facility was carried out.…”

Section: Introductionmentioning

confidence: 99%

“…In another study [10], the combustion of diesel fuel-animal fat blends, not apt for human consumption, in a residential oil burning facility was carried out. The best combustion performances were obtained for blends with 10% animal fat, using an injection pressure of 1x10 5 Pa. Daho et al [11] studied the performance and emissions of different coconut vegetable oil (CnO)-diesel fuel blends in a domestic boiler, and reported that CO, NOx and CO2 emissions were the same for all blends studied, when the boiler worked at an injection pressure of 2x10 6 Pa. Jiru et al [12] evidenced that it is possible to burn blends of SyO degummed fuel oil (20% SyO) in an unmodified commercial burner. The combustion of blends of palm oil (PlO)-diesel fuel in an industrial oil burner with and without secondary air was studied by Mohd Jaafar et al [13].…”

Section: Introductionmentioning

confidence: 99%

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Statistical Study of Combustion Characteristics and Optimal Operation Factor Determination in an Emulsion Burner Fueled with Vegetable Oils

Arroyo¹,

Sanz‐Tejedor²,

Alonso³

et al. 2019

Energy Fuels

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This work experimentally investigates the combustion characteristics of refined soya, sunflower and rapeseed vegetable oils and, by means of statistical techniques, determines the optimal operating factors of an emulsion burner to obtain the best combustion performance and low pollutant emissions. Given the high dimensionality of the study, the PCA provides a descriptive study of the variables involved in the combustion process and of the physicochemical properties of the vegetable oils so as to establish the correlations between them. ANOVA was then performed to identify which factors (type of vegetable oil, fuel flow, and airflow), as well as any possible interactions, have the greatest impact on the combustion results (performance as well as CO2, CO, NOx, CxHy and SOx emissions). ANOVA results showed that almost all of the factors and their interactions were significant, which makes it essential to analyse the interaction plots to see the optimal combinations of levels. This study showed that fuel flow rate was quite an important factor affecting combustion characteristics, that the type of vegetable oil influenced CxHy emissions, and that the airflow rate displayed no clear trend. Furthermore, the best combustion performance coupled with pollutant emissions that were below the lowest limits established by current legislation were achieved for a combination of maximum fuel flow and minimum airflow rates, with soya exhibiting the best performance. In general, good combustion performances were obtained with extremely low NOx emissions, and SOx emissions were not detected in any of the combustion experiments performed.

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Using mixtures of diesel and sunflower oil as fuel for heating purposes in Castilla y Le�n

Cited by 17 publications

References 1 publication

Comparison between land suitability and actual crop distribution in an irrigation district of the Ebro valley (Spain)

Comparison between land suitability and actual crop distribution in an irrigation district of the Ebro valley (Spain)

Life-cycle assessment of bioenergy production systems from oilseed rape crops

Statistical Study of Combustion Characteristics and Optimal Operation Factor Determination in an Emulsion Burner Fueled with Vegetable Oils

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