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Computer simulation of evaporative cooling storage system performance CIGR Journal
Olosunde, William Adebisi; Aremu, Ademola Kabir; Okoko, Paul.
Evaporative cooling occurs when warm and unsaturated air is blown across a wet surface. This study reviews the development of simulation software as a research tool for designing evaporative cooling systems. The simulation incorporates information concerning the effect of the cooling pad length, cooling pad height, cooling pad thickness, air velocity, water flow rate, water temperature, water to air mass flow rate, and number of cooling pad segments in terms of the performance efficiency of the cooling system. The software rapidly produced model data, which was subjected to further analysis for verification and validation during the testing stage. The modelled and experimental data of the saturation efficiency were compared using 4 of the most important...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Crop processing and storage; Information processing Evaporative Cooling system Crop Storage MATLAB Simulation SPSS..
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3915
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Computer-aided engineering (CAE) approach to design a cultivator for small farm holdings in the West Bengal state of India CIGR Journal
Mandal, Dipankar.
Small and marginal farms are one of the big challenges for farm mechanization in the West Bengal state of India. Since the majority of farms are marginal with land holding less than one hectare, use of high capacity equipment is not feasible. The major constraints in the promotion of farm mechanization include the fragmented land holding, low investment capacity of the farmers, the requirement of equipment for each agro-climatic zone of West Bengal, inadequate repairs and maintenance facilities etc. So, small agricultural machinery is gaining importance for research. The cultivator is a secondary tillage tool mostly used in Indian farms. A 5-tyne cultivator may be suitable for small farm lands. So, in this present work, a 5-tyne cultivator was designed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Farm machiney; Computer aided design cultivator; Marginal farm; CAE; CAD; Agriculture; Farm mechanization.
Ano: 2017 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4162
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Design of an innovative olive picking machine CIGR Journal
Solazzi, Luigi; Scalmana, Roberto; Adamini, Riccardo; Faglia, Rodolfo; Borboni, Alberto.
 This work describes the complete design of an olive picking machine especially conceived for secular olive plants with the purpose of increasing the mechanization level of the harvest operation and permitting the production of high quality oil; the design is made considering all the mechanical, agronomical and economical aspects involved in this issue.  Once defined the picking technique, the first step consists in the design of the shacking device used for the separation of the olives from the plant, the next step is the design of the support structure, including the arms and the frame; finally there is a description of the hydraulic plant that drives the moving parts of the machine; in order to increase the flexibility of the machine, it is adapted also...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Mechanical design; Applied mechanics Olive picker mechanical harvest olive oil secular olive trees.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2833
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Determination of some engineering properties of morama bean (Tylosema esculentum) CIGR Journal
Emesu, Pius; Mabuza, Phumuza.
The morama bean (Tylosema esculentum) is an underutilised legume native to the Kalahari region of Southern Africa.  Some engineering properties relevant to the mechanisation of its processing have been characterised, namely; size, shape, surface area, projected area, volume, density, porosity, 1000-grain mass, static angle of repose, static coefficient of friction and texture.  At moisture content of 7.4% (w.b.), the average length, width and thickness of the beans were 19.25, 17.21 and 13.39 mm, respectively.  Geometric mean, equivalent diameter and arithmetic mean diameters were 16.4, 16.51 and 16.61 mm, respectively.  Morama beans are spherical in shape, having average sphericity of 85.45%, aspect ratio of 0.90 and flakiness ratio of 0.78.  Surface...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Post-harvest technology; Agricultural processing morama dimensional properties gravimetric properties flow properties texture.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2843
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Effect of liquid poultry manure and injection depth on growth and yield of maize CIGR Journal
Manuwa, Seth Idowu; Ademosun, Olugboyega Cornelius; Akande, Lamidi Olawale.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Farm power and machinery; Land application of biosolids Injection liquid poultry manure maize (Zea mays) growth yield.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2784
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Effects of storage duration and conditions on mechanical properties of Viola cucumber fruit under compression loading CIGR Journal
Jahangiri, Mehdi; Hassan-Beygi, Seyed Reza; Aboonajmi, Mohammad; Lotfi, Mahmoud.
In this research, the effects of storage duration and storage conditions on mechanical properties of cucumber fruit (Viola variety) were evaluated at different positions of the fruit length.  The cucumber fruit mechanical properties determined in this study were firmness, apparent modulus of elasticity, failure stress, failure strain and failure energy.  The mechanical properties determined under compression loading using puncture and uni-axial compression tests.  The results showed that the storage duration, storage conditions and fruit test position had significant (P<0.01) effect on the mechanical properties of Viola cucumber fruit.  The samples firmness, modulus of elasticity, failure stress and failure energy reduced about 49%, 39%, 38% and 33%,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Agro-technology cucumber apparent modulus of elasticity storage failure energy firmness stress strain.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3615
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Effects of temperature and time on oil extraction from some Nigerian indigenous fresh water microalgae species CIGR Journal
Asoiro, Felix Uzochukwu; Okonkwo, Wilfred Ifeanyi; Akubuo, Clement Onyeaghala; Nweze, Nkechinyere O.; Anyanwu, Cosmas Ngozichukwu.
This study determined the effects of temperature and time on oil extraction from indigenous freshwater microalgae– Dictyosphaerium, Chlorella, Desmodesmus and Cosmarium species, cultured in fifteen 2-litre column photobioreactors (PBR) (three per specie).  Growth and specific growth rates for the mixotrophic>autotrophic cultivation of the species. Oil was extracted from the dried microalgae species at temperatures ranging from 40 to 120 °C at 20 oC intervals and times ranging from 30 to 210 minutes at 30 minutes’ intervals, by accelerated solvent extraction method. Extraction temperature, time and type of microalgae species had significant effect (p < 0.05) on oil yield (temperature > time > type of species).  As extraction temperature and time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Bioresources engineering; Biotechnology; Energy; Renewable energy; Agriculture. oil yield; Dictyosphaerium spp; Desmodesmus subspicatus; Chlorella lewinii; Cosmarium spp; Growth rate..
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5247
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Emissions inventory of greenhouse gases and ammonia from livestock housing and manure management CIGR Journal
Mohamed Samer; Cairo University, Faculty of Agriculture, Department of Agricultural Engineering.
An emission inventory is a database on the amount of pollutants released into the atmosphere.  The anthropogenic emissions of air pollutants and greenhouse gases are detrimental to the environment and the ecosystems.  Therefore, reducing emissions is crucial. One key issue is to inventory these emissions, and consequently databases on anthropogenic emissions will be available for making decisions on implementing suitable mitigation strategies.  Such investigations aim at developing national emissions inventory for domestic livestock and to identify possible abatement techniques in order to reduce these emissions.  Therefore, the objectives of this study are to introduce and define the emissions inventories, review the emission inventory guides, introduce...
Palavras-chave: Agricultural engineering; Agricultural buildings and bioenvironmental engineering emissions inventory; Greenhouse gases; Methane; Nitrous oxide; Ammonia; Particulate matter; Livestock buildings; Manure; Emission factors; Emissions abatement techniques.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2449
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Emissions inventory of greenhouse gases and ammonia from livestock housing and manure management CIGR Journal
Samer, Mohamed.
An emission inventory is a database on the amount of pollutants released into the atmosphere.  The anthropogenic emissions of air pollutants and greenhouse gases are detrimental to the environment and the ecosystems.  Therefore, reducing emissions is crucial. One key issue is to inventory these emissions, and consequently databases on anthropogenic emissions will be available for making decisions on implementing suitable mitigation strategies.  Such investigations aim at developing national emissions inventory for domestic livestock and to identify possible abatement techniques in order to reduce these emissions.  Therefore, the objectives of this study are to introduce and define the emissions inventories, review the emission inventory guides, introduce...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Agricultural buildings and bioenvironmental engineering emissions inventory; Greenhouse gases; Methane; Nitrous oxide; Ammonia; Particulate matter; Livestock buildings; Manure; Emission factors; Emissions abatement techniques.
Ano: 2013 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2449
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Engineering properties of Roselle (Hibiscus sabdariffa) calyxes CIGR Journal
Aregbesola, Omotayo Adeteju; Faborode, Micheal Oladimeji; Ezeokoli, Obinna Ikenna.
Physical, mechanical and thermal properties of dried and freshly harvested Roselle calyxes were determined using standard procedures based on literature. The obtained results showed that in terms of shape and size, the red variety was more slender with a pointed apex when compared to the dark red variety (Hibiscus sabdariffa. L). Porosity values were close for the dried calyxes and were 53.85% for fresh calyxes. A high percent (72.21%) of whole calyxes was obtained for the fresh calyxes when compared to that for the two varieties of dried calyxes studied. The value of angle of repose for the fresh calyxes was 51.530 while the dry calyxes had lower values (23.10 and 22.40o) for red and dark red calyxes, respectively. Results also showed that the coefficient...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Food processing Roselle calyxes; Physical properties; Mechanical properties; Thermal properties; Dry calyxes; Fresh calyxes.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3664
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Evaluation of additive for reducing gaseous emissions from swine waste CIGR Journal
Sanjay B. Shah; NC State University; Praveen Kolar; Biological and Agricultural Engineering Department, North Carolina State University, Raleigh, NC 27695, USA.
Additives can reduce gaseous emissions from swine waste lagoons and pits.  We have demonstrated for the first time that an additive has the potential to reduce methane emission from an anaerobic swine lagoon.  ManureMax®, a humate product was evaluated for its ability to reduce gas and odor emissions from swine anaerobic lagoon and barn flush-water.  Four treatments, Control (no additive), Low (label dosage), Medium (50% higher than label dosage), and High (200% higher than label dosage) were applied to inclined pipes installed in a swine lagoon.  While the Medium and High treatments were not effective, the Low treatment reduced methane, 2-butanone, and tetrahydrofuran concentrations by 34%, 44%, and 57%, respectively vs. the Control in the pipe headspace....
Palavras-chave: Agricultural engineering; Environmental engineering; Air quality; Greenhouse gases; Animal waste Hog; Mesocosm-scale; Methane; 2-butanone; Tetrahydrofuran; Volatile fatty acids; Toluene.
Ano: 2012 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2111
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Field Performance of a Winged Scarifier as a Function of Soil Compaction and Water Content Chilean J. Agric. Res.
Cholaky,Carmen; Cisneros,José M; Balbuena,Roberto.
Initial soil conditions, operational aspects, and tool shape affect the efficiency of soil decompaction. The objective of this study was to evaluate the performance of a winged scarifier as a function of soil compaction and edaphic water content. The experiment was carried out in a typical Hapludoll. Treatments considered two soil compaction levels: high (HC) and low compaction (LC); and three soil water contents: wet (WS), humid (HS), and dry (DS) with 9, 14, and 19% gravimetric water content, respectively. A split-plot randomized block design was applied. Tractive effort, disturbed area, tillage depth, specific resistance, and power were evaluated. Results showed that tractive effort was 17% greater in HC than LC, and in both cases HS was greater than WS...
Tipo: Journal article Palavras-chave: Agricultural engineering; Winged scarifier; Bulk density; Water content; Compaction.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100016
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First steps in the grape mechanization process in Brazil: quantitative features CIGR Journal
da Costa Neto, Wilson Valente; Izard, Miguel Garrido; Elorza, Pilar Barreiro; Domingues, Fabrício.
Grape harvest is still fully manual in the majority of farms in Brazil (above 99%), yet the structure of the fields and the vine trellis are already prepared for it in a 24% of the cases. Besides, only the large-size farms are prepared for performing a detailed analysis of working capacity, product quality and losses; data of great value when trying to quantitatively address the incorporation of machinery. The fact that grape harvest in South America (and South Africa) be complementary in season compared to Europe, or North America, makes this potential market of Brazil an interesting option for European manufacturers. In this work, we have supervised a whole grape harvest season, in a 552ha farm, where both, mechanical (trailed) and manual harvest, are...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm management system; Agricultural engineering; Viticulture in Brazil; Grape harvest; Case study..
Ano: 2017 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4015
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Frequency, moisture content, bulk density and hybrid effects on grain sorghum dielectric properties CIGR Journal
Moura, Eros Estevão; Berbert, Pedro Amorim; Souza, Elias Fernandes; Garcia, Ricardo Ferreira; Molina, Marilia Amorim; Oliveira, Marcia Ramos.
The interest in the dielectric properties of grains has been increasing over the years due to their potential utilization in advanced technologies such as the density-independent on-line estimation of moisture content in automatic control processes in grain drying operations. A capacitive sensor was used with a LCR meter to obtain a better understanding of the variation of relative permittivity and dielectric loss factor of four hybrids of grain sorghum in the frequency range from 75 kHz to 5 MHz, at 23°C and 62% relative humidity. Curves that are presented illustrate the variation of these dielectric properties on moisture content (7% to 23% w.b.), bulk density (575 to 819 kg/m3) and hybrid. The obtained results should provide a firm basis for future...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Postharvest technology; Grain drying relative permittivity loss factor radiofrequency impedance.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3027
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Increasing the impact of engineering in agricultural and rural development International Rice Research Institute
Bell, M.A.; Dawe, D.; Douthwaite, M.B..
16 p. : ill. IRRI Discussion Paper Series no. 30
Tipo: Technical Report Palavras-chave: Agricultural engineering; Mechanization; Technology.
Ano: 1999 URL: http://hdl.handle.net/10269/150
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Isometric muscular strength data of Indian agricultural workers for equipment design: Critical analysis CIGR Journal
Patel, Thaneswer; Sanjog, J; Kumar, Prakash; Karmakar, Sougata.
Abstract: Human muscular strength is extensively used in Indian agriculture for operating various push-pull type farm tools and equipment.  Incompatibility between operators’ physical capabilities (anthropometric and biomechanical) and demands of physical task to operate tools/equipment often leads to poor performance, low productivity and safety problems.  Although anthropometric data are generally being considered, an inadvertent negligence of using strength database for agricultural tools/equipment design is very common in developing countries like India.  Therefore, in present paper an attempt has been made to statistically analyze available strength data (pooled and regional/state wise data) of male and female Indian agricultural workers to understand...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Ergonomics Ergonomics Muscular strength Tools and equipment Agricultural workers India.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2826
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Moisture Sorption Isotherms and Mathematical Model Selection for Dried Sandfish (Holothuria scabra) CIGR Journal
Yaptenco, Kevin Fernandez.
Dried sandfish (Holothuria scabra) is often poorly dried by artisanal fishers in the Philippines, resulting in downgrading of the product. To establish recommended moisture content (MC) for a stable product, this study aimed to develop moisture sorption isotherms (MSI) at 30, 45 and 60°C at ten levels of water activity (aw) using an isopiestic method based on saturated salt solutions. MSI data was fitted to six mathematical models by non-linear regression analysis. Water vapor transmission rate (WVTR) of low-density polyethylene (PE) and polypropylene (OPP) film was measured at 30 and 35oC. A mass-balance model was used to predict shelf life and moisture content during storage based on MSI and WVTR data. MSI of H. scabra followed a Type III curve, which...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Food processing; Drying Moisture sorption sandfish sea cucumber shelf life water activity Philippines.
Ano: 2017 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3807
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Participatory Rural Appraisal for Diagnostic Analysis of spate irrigation systems in Raya Valley, Ethiopia JARTS
Castelli, Giulio; Bresci, Elena.
Spate irrigation is a complex and unique form of water management, which represent the main source of irrigation water in semi-arid river catchments. Water is diverted from seasonal rivers by using diversion structures made by stones, earth and brushwood, located within the river bed. The modernisation of spate irrigation realised in Raya Valley (northern Ethiopia) resulted in disappointing performances. One of the main reasons for this failure was the poor consideration of the characteristics of seasonal catchments and local communities’ needs and preferences. Local farmers, who showed a deep knowledge of the river system, were involved only at the level of consultation. The aim of this research was to develop a participatory Diagnostic Analysis (DA) for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Hydraulic engineering; Social Sciences participatory rural appraisal; Indigenous knowledge; Rural development; Water harvesting; Ethiopia; Tigray; Arid climates.
Ano: 2017 URL: http://www.jarts.info/index.php/jarts/article/view/2017031552237
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Performance study of a standalone direct pumping photovoltaic system used for drip irrigation CIGR Journal
HARKANI, ASSIA; El Aissaoui, Abdellah.
This paper aims to study performances of a standalone photovoltaic pumping system confronted to actual behaviour of incident irradiance. The system is based on a photovoltaic generator, a MPPT/ DC-DC converter, and a diaphragm DC motor pump connected to calibrated ( Flow versus Pressure) orifices, simulating small drip irrigation network, mounted in parallel scheme to vary the pump operating point according to timely varied irradiance. The result showed  that daily trend of solar irradiance influence considerably operating behaviour of the pump, consequently the performance of the standalone PV system is affected as there is inadequation between charges of the PV generator and the DC pump.  The hydraulic effeciency trends showed a dispersion and varying...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural engineering; Enegy in agriculture Standalone; Photovoltaic pumping system; Performances; Irradiance; Efficiency; MPPT; DC pump..
Ano: 2019 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4822
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Power demand of a flail shredder during the harvest of pineapple fields Ciencia e Investigación Agraria
Pérez de Corcho Fuentes,Jorge S; Garbati Pegna,Francesco; Iglesias Coronel,Ciro; García Reina,Francisco; Spugnoli,Paolo.
The power demand of the demolition of pineapple (Ananas comosus) fields, whose production cycle is finished with a flail mower with two different knives, a cutting apparatus with three angular velocities, and a tractor with three translation velocities, was determined using strain gage measures. The results of the investigations demónstrate the influence of the knife type and cinematic regime of the cutting apparatus in the demand of energy in the pineapple demolition. Furthermore, they permitted the validation of models of the power demand of the flail mower.
Tipo: Journal article Palavras-chave: Agricultural engineering; Agricultural machinery; Annas comosus; Energy mechanization.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000100005
Registros recuperados: 24
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