Relevant bibliographies by topics / Land equivalent ratio (LER)

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Land equivalent ratio (LER)'

Author: Grafiati
Published: 3 June 2025
Last updated: 19 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Land equivalent ratio (LER).'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Land equivalent ratio (LER)"

1

Riley, Janet. "Examination of the Staple and Effective Land Equivalent Ratios." Experimental Agriculture 21, no. 4 (1985): 369–76. http://dx.doi.org/10.1017/s0014479700013193.

Full text
Abstract:
SUMMARYTwo extensions to the Land Equivalent Ratio (LER) concept, the Effective LER and the Staple LER, are evaluated for an intercrop of two species. The use of different standardizing sole-crop yields in the Effective LER equation is emphasized for the formation of different comparisons between intercrop and sole-crop yields. The Staple LER for different standardizing sole-crop yields is introduced. The equivalence of the Staple and Effective LERs under certain conditions is shown and illustrated.
APA, Harvard, Vancouver, ISO, and other styles
2

Nurmas, Andi, Rahayu Mallarangeng, and Andi Kristianto. "Pengendalian Hama Plutella xylostella L. pada Tanaman Kubis yang Ditumpangsarikan dengan Tanaman Tomat." Berkala Penelitian Agronomi 8, no. 1 (2020): 1. http://dx.doi.org/10.33772/bpa.v8i1.12087.

Full text
Abstract:
Penelitian bertujuan untuk mengevaluasi pola tanam terhadap keberadaan hama dan musuh alami, intensitas kerusakan tanaman kubis dan produktivitas lahan tumpangsari kubis dan tomat. Penelitiandilakukan di Laboratorium Lapangan Kebun Percobaan IIdan Laboratorium Unit Agronomi Fakultas Pertanian Universitas Halu Oleo, Kendari, pada bulan April hingga Juni 2018.Penelitian menggunakan Rancangan Acak Kelompok (RAK) yang terdiri dari 4 perlakuan dengan 5 kali ulangan sebagai kelompok sehingga diperoleh 24 unit percobaan, yang terdiri dari monokultur kubis (MK), monokultur tomat (MT), tumpangsari kubi
APA, Harvard, Vancouver, ISO, and other styles
3

HEFNY, Yaser A.A. "Evaluation of intercropping sesame in different planting densities with peanut grown within orange trees under deficit irrigation." Moroccan Journal of Agricultural Sciences 5, no. 1 (2024): 16–24. https://doi.org/10.5281/zenodo.10774718.

Full text
Abstract:
A field experiment was carried out during 2018 and 2019 summer seasons to test the interaction effect between two deficit irrigation treatments (DI1=100% ETo, DI2=80% ETo), plus control (FI= 120% ETo) and three planting densities (PD) of intercropped sesame (CS1=20% PD, CS2=40% PD, CS3= 60% PD) with peanut (100% PD) interplanted within orange trees on land and water productivities, as well as on farmer’s profit. The results showed that the highest peanut and orange yields were obtained under application of FI-CS1 and the highest yield of sesame and its components were obtained under appl
APA, Harvard, Vancouver, ISO, and other styles
4

VARUGHESE, KURUVILLA, and IRUTHAYARAJ M.R. "BIOLOGICAL AND ECONOMIC INDICES FOR MEASURING RESOURCE UTILISATION IN MAIZE-SOYBEAN INTERCROPPING SYSTEM." Madras Agricultural Journal 83, september (1996): 556–59. http://dx.doi.org/10.29321/maj.10.a01052.

Full text
Abstract:
Experiments were conducted at the Tamil Nadu Agricultural University, Coimbatore to assess the biological and economic advantages of maize-soybean intercropping system under varying levels of irrigation and nitrogen during summer and kharif seasons of 1990. Though, land equivalent ratio (LER) recorded a positive value under varying levels of intercrops, irrigation and nitrogen, the land equivalent coefficient (LEC) showed its superiority in measuring the competition aspects in intercropping. The monetary equivalent ratio (MER) was modified with a new concept called net monetary equivalent rati
APA, Harvard, Vancouver, ISO, and other styles
5

Russell, J. T., and R. M. Caldwell. "Effects of Component Densities and Nitrogen Fertilization on Efficiency and Yield of a Maize/Soyabean Intercrop." Experimental Agriculture 25, no. 4 (1989): 529–40. http://dx.doi.org/10.1017/s0014479700015155.

Full text
Abstract:
SUMMARYA field study was conducted in 1985 at two locations in Maryland, USA, to test the influence of environment (location), input level (N fertilization), management (component density combinations), and measure of performance on recommendations for a maize/soyabean intercrop. Location affected the degree of intercrop yield depression of each crop; the effect of N on relative competitive abilities; the maximum Land Equivalent Ratio (LER) and maximum modified Staple Land Equivalent Ratio (SLER); the difference between LER and SLER; the optimum density combinations and change in optima in res
APA, Harvard, Vancouver, ISO, and other styles
6

Irsyammawati, Artharini, Ifar Subagiyo, Mashudi Mashudi, and Marjuki Marjuki. "Productivity and LER (Land Equivalent Ratio) Napier grass-based intercropping with Legume Cover Crop (LCC)." BIO Web of Conferences 123 (2024): 01050. http://dx.doi.org/10.1051/bioconf/202412301050.

Full text
Abstract:
The aim of the study was to evaluate productivity and Land Equivalent Ratio (LER) Napier grass-based intercropping with Legume Cover Crop (LCC). The experiment conducted at Teaching Farm Faculty of Animal Science, Universitas Brawijaya. Three type of LCC (A) were Clitoria ternatea, Centrocema pubescens and Pueraria javanica and number of row of LCC (B) that nested on factor A. Each treatment repeated 4 times. One plot of experiment were 5 × 4 m (30 plants, 5 row). Parameters that observed were productivity (fresh and dry matter forage production) and LER. Data analyzed with Variance Analysis u
APA, Harvard, Vancouver, ISO, and other styles
7

Samrin, Samsul, Syamsuddin Millang, Ridwan, and M. Daud. "Land Productivity and Land Equivalent Ratio of Agroforestry System in Marena Customary Forest, Enrekang Regency, South Sulawesi Province, Indonesia." Jurnal Sylva Lestari 12, no. 2 (2024): 532–48. http://dx.doi.org/10.23960/jsl.v12i2.877.

Full text
Abstract:
Applying agroforestry system in the customary forest area plays a significant role in increasing the productivity of the community’s land because it will increase the economic value and welfare of the customary community. This study aims to analyze the agroforestry system’s land productivity and land equivalent ratio in the Marena Customary Forest (MCF) area, Enrekang Regency. This research used a survey method involving observation, questionnaires, and interviews with sample respondents who owned land and applied agroforestry systems in the MCF. Data obtained from interviews and field observa
APA, Harvard, Vancouver, ISO, and other styles
8

Seserman, Diana-Maria, Dirk Freese, Anita Swieter, Maren Langhof, and Maik Veste. "Trade-Off between Energy Wood and Grain Production in Temperate Alley-Cropping Systems: An Empirical and Simulation-Based Derivation of Land Equivalent Ratio." Agriculture 9, no. 7 (2019): 147. http://dx.doi.org/10.3390/agriculture9070147.

Full text
Abstract:
The alley-cropping systems (ACSs), which integrate parallel tree strips at varying distances on an agricultural field can result, complementarity of resource use, in an increased land-use efficiency. Practitioners’ concerns have been directed towards the productivity of such systems given a reduced area covered by agricultural crops. The land equivalent ratio (LER) serves as a valuable productivity indicator of yield performance and land-use efficiency in ACSs, as it compares the yields achieved in monocultures to those from ACSs. Consequently, the objective of this combined experimental and s
APA, Harvard, Vancouver, ISO, and other styles
9

A, Gebremichael, Bekele B, and Tadesse B. "Evaluation of the effect of sorghum-legume intercropping and its residual effect on yield of sorghum in yeki woreda, sheka zone, Ethiopia." International Journal of Agricultural Research, Innovation and Technology 9, no. 2 (2019): 62–66. https://doi.org/10.3329/ijarit.v9i2.45412.

Full text
Abstract:
The imbalance between the crop production and population growth is currently the major issue in southern Ethiopia. To feed the growing population, increasing the production of food through growing more crop types in the same field as an intercropping is the right strategy. The current study was aimed at evaluating the effect of sorghum-legume intercropping and its residual effect on yield of sorghum. The land equivalent ratio was calculated for sorghum intercropped with pigeon pea and cowpea. Intercropping sorghum with pigeon pea and cowpea increases the land productivity as its Land Equivalen
APA, Harvard, Vancouver, ISO, and other styles
10

Sumarni, Titin, and Ariek Dwi Anggoro. "Land use efficiency of sweet corn intercropping with different cowpea planting dates." Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) 52, no. 2 (2024): 206–16. http://dx.doi.org/10.24831/jai.v52i2.57193.

Full text
Abstract:
Cultivation of cowpea and sweet corn can optimize land use through an intercropping system, however, the planting date on intercropping is rarely evaluated. The research aimed to evaluate land use efficiency in sweet corn intercropping of different planting dates of cowpea. This research was conducted from January to May 2024 in Bocek Village, Malang, East Java. The study used a randomized complete block design with a single factor consisting of 7 levels, i.e., monoculture sweet corn, and sweet corn intercropping with different cowpea planting dates (0, 7, 14, 21, 28, and 35 days after sweet c
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Land equivalent ratio (LER)"

1

Paut, Raphael. "Analyse des compromis entre diversité cultivée et complexité de gestion à travers le cas d’étude du Verger-Maraîcher : Une approche combinant modélisation et méthodes qualitatives Reducing risk through crop diversification: an application of portfolio theory to diversified horticultural systems Modelling crop diversification and association effects in agricultural systems." Thesis, Avignon, 2020. http://www.theses.fr/2020AVIG0724.

Full text
Abstract:
Les vergers-maraichers sont des systèmes mixtes agroforestiers qui visent à optimiser l'utilisation des ressources spatiales et temporelles en produisant des fruits et des légumes sur la même parcelle. De ce point de vue, ces systèmes semblent en mesure de répondre au double enjeu productif et environnemental auquel l’agriculture est confrontée aujourd’hui. Néanmoins, les vergers-maraichers sont caractérisés par une grande complexité structurale et organisationnelle, car ils combinent deux ateliers très exigeants possédant des dynamiques contrastées. Dans cette optique, les conditions permetta
APA, Harvard, Vancouver, ISO, and other styles
2

Bedoussac, Laurent. "Analyse du fonctionnement des performances des associations blé dur-pois d'hiver et blé dur-féverole d'hiver pour la conception d'itinéraires techniques adaptés à différents objectifs de production en systèmes bas-intrants." Phd thesis, Toulouse, INPT, 2009. http://oatao.univ-toulouse.fr/7855/1/bedoussac.pdf.

Full text
Abstract:
Les associations d'espèces sont définies comme la culture simultanée d'au moins deux espèces sur la même parcelle pendant une période significative de leur croissance. Ce système permettrait d'améliorer l'utilisation des ressources du milieu (eau, azote, lumière…) et ainsi d'augmenter le rendement et la qualité des grains par rapport aux cultures monospécifiques. L'objectif de notre travail était d'analyser le fonctionnement et d'évaluer la performance des associations blé dur - pois d'hiver et blé dur - féverole d'hiver pour aider à la conception d'itinéraires techniques adaptés à différents
APA, Harvard, Vancouver, ISO, and other styles
3

Barros, Júnior Aurélio Paes [UNESP]. "Adubação nitrogenada no consórcio alface e rúcula." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105218.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:33:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-02-20Bitstream added on 2014-06-13T20:45:36Z : No. of bitstreams: 1 barrosjunior_ap_dr_jabo.pdf: 517386 bytes, checksum: 645a826a9d61527bb271720029dfffe4 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Com o objetivo avaliar a influência de doses de nitrogênio realizadas para a alface e/ou para a rúcula, em consórcio, sobre as plantas (estado nutricional e crescimento) e sobre o consórcio (produtividade, classificação e qualidade, uso eficiente da área e rent
APA, Harvard, Vancouver, ISO, and other styles
4

Barros, Júnior Aurélio Paes. "Adubação nitrogenada no consórcio alface e rúcula /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/105218.

Full text
Abstract:
Resumo: Com o objetivo avaliar a influência de doses de nitrogênio realizadas para a alface e/ou para a rúcula, em consórcio, sobre as plantas (estado nutricional e crescimento) e sobre o consórcio (produtividade, classificação e qualidade, uso eficiente da área e rentabilidade), foi realizado um experimento no período de setembro à dezembro de 2006, na Unesp, Campus de Jaboticabal-SP. O delineamento experimental foi o de blocos casualizados completos, com quatro repetições, sendo os tratamentos arranjados em esquema fatorial 4 x 4 + 2. Os tratamentos resultaram da combinação de quatro doses d
APA, Harvard, Vancouver, ISO, and other styles
5

Pinto, Ciro de Miranda. "ConfiguraÃÃo e antecipaÃÃo de plantio da mamona em consÃrcio com a cultura do girassol." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6541.

Full text
Abstract:
CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior<br>A mamoneira (Ricinus communis) Ã tolerante a seca e cultivada para produÃÃo de Ãleo para uso industrial. Na regiÃo Nordeste os pequenos produtores cultivam a mamona consorciada algodÃo, feijÃo caupi, gergelim, girassol, milho, sorgo ou amendoim. Dois experimentos de campo foram conduzidos nos anos agrÃcolas 2008, 2009 e 2010, na Fazenda Experimental Lavoura Seca, QuixadÃ, CearÃ, com o objetivo de avaliar o comportamento da mamona e girasssol cultivados em dois padrÃes de consorciaÃÃo. No experimento I avaliou-se o consorcio mamona (Ma) x gira
APA, Harvard, Vancouver, ISO, and other styles
6

Talbot, Grégoire. "L'intégration spatiale et temporelle du partage des ressources dans un système agroforestier noyers-céréales : une clef pour en comprendre la productivité ?" Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2011. http://tel.archives-ouvertes.fr/tel-00664530.

Full text
Abstract:
Des mesures sur parcelles agroforestières (mélanges d'arbres et de cultures) expérimentales mettent en évidence des productivités exceptionnelles, avec des gains de plus de 30% par rapport à l'assolement de cultures pures. Nous avons mis au point et utilisé un modèle numérique dynamique en 3-D (Hi-sAFe) pour (1) tester si l'intégration spatio-temporelle du partage des ressources (lumière, eau, azote) entre espèces suffit à expliquer cette productivité et (2) évaluer l'impact de différents choix de conception ou de gestion sur cette productivité, à partir d'une compréhension des processus impli
APA, Harvard, Vancouver, ISO, and other styles
7

Maimela, Katlego Alocia. "Performance of five cowpea (Vigna uguiculata L.) varieties in cowpea/maize strip intercropping in Limpopo." Thesis, 2019. http://hdl.handle.net/10386/2972.

Full text
Abstract:
Thesis (MSc. Agriculture (Agronomy)) -- University of Limpopo, 2019<br>The traditional practice of farmers in Limpopo Province is to mixed and broadcast crops at planting without definite row arrangement. This practice hinders farm input application and results in low crop yields. Strip intercropping, where crops are planted with definite row arrangement, has the advantage of reducing inter-species competition, optimise plant population and increasing crop yield. This study aimed at improving cowpea-maize cropping systems using strip intercropping. The experiment was conducted at University of
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Land equivalent ratio (LER)"

1

Kristamtini, Arini Putri Hanifa, Setyorini Widyayanti, et al. "Competitive Dynamics and Yield Performance of Soybean-Based Intercropping Systems on Inceptisols." In Soybean Science and Sustainability - Advancing Crop Productivity, Nutrition, and Climate Resilience [Working Title]. IntechOpen, 2025. https://doi.org/10.5772/intechopen.1010302.

Full text
Abstract:
This study evaluated the competitive dynamics and yield performance of soybean-based intercropping systems on dryland Inceptisols. Conducted in Gunungkidul, Yogyakarta, Indonesia, from March to August 2020, the research compared four intercropping systems: upland rice-soybean, maize-soybean, maize-peanut, and maize-upland rice, against their respective monocultures. A randomized complete block design with five replicates was employed. Analysis to assess agronomic performance includes Land Equivalent Ratio (LER), Aggressivity (A), Competitive Ratio (CR), Relative Crowding Coefficient (K), and Actual Yield Loss (AYL). Results clearly demonstrated that maize-soybean intercropping was the most advantageous system for Inceptisols. While maize exhibited greater competitive dominance over soybean, as evidenced by Land Equivalent Ratio (LER) of 1.91, Actual Yield Loss (AYL) of 1.07, Aggressivity (A), and Competitive Ratio (CR), the intercropping system significantly enhanced overall productivity. Notably, maize-soybean intercropping achieved the highest yields. This study highlights the superior competitiveness and productivity of soybean when intercropped with maize on dryland Inceptisols, providing valuable insights for optimizing agricultural practices in these challenging environments.
APA, Harvard, Vancouver, ISO, and other styles
2

Kurmi, Ramkishor, Jagdeesh Kurmi, Manojit Chowdhury, Pradeep Kumar, Suyog Balasaheb Khose, and Rohit Anand. "AGRI-VOLTAIC: A SUSTAINABLE SOLUTION FOR CLIMATE SMART AGRICULTURE." In Futuristic Trends in Agriculture Engineering & Food Sciences Volume 3 Book 15. Iterative International Publisher, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3bcag15p2ch1.

Full text
Abstract:
Generation of renewable energy has currently gained more importance around the world than ever before. In India, Photovoltaic (PV) based electricity shares a major portion of total renewable energy generation. This technology harnesses the power of the sun to produce clean and renewable energy, offering a pathway towards a greener and more sustainable future. The potential of photovoltaic-based electricity generation lies in its versatility and accessibility. The installation of PV systems on open areas is the lowest cost option, are also installing on the agricultural land. This can result in a land-use conflict between energy and food production, and can be of major concern especially in regions with limited crop land area or having dense population. Since both food and energy are required for human population, the agri-voltaic (AV) systems can be seen as a way of combining PV and food production on the same land area at the same time. Since, different parameters such as shading effect of PV panels on microclimate and morphological characteristics of the plant, land equivalent ratio (LER) and levelized cost of electricity (LCOE) production are important for design of AV system. This chapter aims to give an insight about the design parameters and numerous benefits of AV system over tradition PV based electricity generation technique.
APA, Harvard, Vancouver, ISO, and other styles
3

Dobocha, Dereje, and Debela Bekele. "Faba Bean Agronomic and Crop Physiology Research in Ethiopia." In Legumes [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101542.

Full text
Abstract:
Faba bean is an important pulse crop in terms of protein source, area coverage, and volume of annual production in Ethiopia. The aim of this paper is to assess the agronomic and crop physiology investigations in the past two decades in Ethiopia. The production limiting factors of this crop are low input usage, natural disasters, depletion of macronutrients, and unavailability of essential nutrients. Phosphorus is among the main limiting nutrients in soil systems in Ethiopia. Seed yield and biomass yield of faba bean were increased from 1338 to 1974 kg/ha and from 3124 to 4446 kg/ha when phosphorous was changed from 0 to 52 kg/ha, respectively at Holeta whereas application of 40 kg P ha − 1 resulted in higher grain yield (6323 kg ha−1) and 3303 kg ha−1 at Lemu-Bilbilo and Bore highlands, respectively. The highest grain yield of 32 kg ha−1 was obtained from the application of 92 kg P2O5 ha−1 at Sekela district while application of 46 kg P2O5 ha−1 resulted in a substantial increase in seed yield over unfertilized plots on vertisols of Ambo. On the other hand, the results suggest that using starter nitrogen from 0 to 27 kg/ha has marginally increased faba bean yield but, a farther increase of nitrogen has indicated deteriorate of yield at Arsi zone. Proper plant populations play a crucial role in enhancing faba bean production. Planting faba bean at 30 cm × 15 cm spacing gave the highest grain yield in Duna district while it was 30 × 7.5 cm at vertisols of Ambo University research farm. Significantly higher seed yield (4222 kg/ha) was observed in the 40 cm inter-row spacing as compared to 50 cm inter-row spacing, which gave the lowest seed yield per hectare (3138 kg/ha) on fluvisols of Haramaya University. Intercropping and crop rotation are cropping systems that can increase soil fertility and crop yield. Intercropping of faba bean with barley at Debre Birhan increased land equivalent ratio than both crops when planted as sole. An additional income of 18.5% and 40% was gained than planting sole faba bean and wheat, respectively at Kulumsa. Faba bean can fix about 69 kg/ha nitrogen in Northern Ethiopia. Generally, the current review results showed that only limited studies in organic and bio fertilizer, plant density, and cropping systems were done on faba bean in Ethiopia. Hence, studies regarding soil acidity, organic fertilizer, and secondary plus micronutrient impacts on faba bean production and productivity along soil types and weather conditions need great attention in the future in Ethiopia.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Land equivalent ratio (LER)"

1

Kintl, Antonin. "ASSESSING THE BIOLOGICAL YIELD WITH LAND EQUIVALENT RATIOS (LER) OF SIX VARIANTS WITH MIXED CULTURE OF CORN (ZEA MAIS) AND LEGUMES." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/5.2/s20.013.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Montomoli, F., M. Massini, S. Salvadori, and F. Martelli. "Geometrical Uncertainty and Film Cooling: Fillet Radii." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22979.

Full text
Abstract:
This study presents an investigation of the impact of filleted edges variations on heat transfer. In real gas turbines, sharp edges are an approximation, because of manufacturing tolerances and/or geometrical modifications occurring during operation. The value of fillet radius is not exactly known a priori. It can be assumed that a specific radius occurs with a probability following a probabilistic distribution. For this reason, the effect of variation of the filleted edge on internal channel of a film cooling configuration has been studied numerically using an in house solver. The hole exit i
APA, Harvard, Vancouver, ISO, and other styles
3

Menon, S. "CO Emission and Combustion Dynamics Near Lean-Blowout in Gas Turbine Engines." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53290.

Full text
Abstract:
Lean-Blowout (LBO) is a phenomenon that occurs in both land-based premixed and propulsion liquid-fuelled gas turbine engines when the effective equivalence ratio is reduced close to the lean flammability limit. Small perturbations in the flame or flow can result in local quenching that can subsequently lead to total extinction (LBO). Prediction of pollutant emission (e.g., CO) and combustion dynamics near LBO is very complicated since physics at many interacting scales have to be resolved. Here, LES studies of both premixed and liquid-fuelled gas turbine engines are reported using a subgrid li
APA, Harvard, Vancouver, ISO, and other styles
4

Kokanovic´, Stanka, Gianfranco Guidati, Stephan Torchalla, and Bruno Schuermans. "Active Combustion Control System for Reduction of NOx and Pulsation Levels in Gas Turbines." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90895.

Full text
Abstract:
This paper presents two different active combustion control systems (ACCS) for the reduction of NOx levels, and suppression of thermo-acoustic instabilities within stationary gas turbines. Dependent on the actual measurement the ACCSs steer the fuel split between different burner groups or within the burner itself in order to find an optimum operation point. In a first step, an active control system has been developed for the ALSTOM GT13E2 gas turbine where the fuel ratio between two burner groups has to be handled to optimise NOx and pulsation levels. Since perturbations in combustion operati
APA, Harvard, Vancouver, ISO, and other styles
5

Kim, Won-Wook, Jeffrey J. Lienau, Paul R. Van Slooten, Meredith B. Colket, Robert E. Malecki, and Saadat Syed. "Towards Modeling Lean Blow Out in Gas Turbine Flameholder Applications." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53967.

Full text
Abstract:
The objective of this study was to assess the accuracy of the Large-Eddy Simulation (LES) methodology, with a simple combustion closure based on equilibrium chemistry, for simulating turbulent reacting flows behind a bluff body flameholder. Specifically, the variation in recirculation zone length with change in equivalence ratio was calculated and compared to experimental measurements. It was found that the present LES modeling approach can reproduce this variation accurately. However, it understated the recirculation zone length at the stoichiometric condition. The approach was assessed at th
APA, Harvard, Vancouver, ISO, and other styles
6

Duwig, Christophe, Robert-Zoltan Szasz, and Laszlo Fuchs. "Modelling of Flameless Combustion Using Large Eddy Simulation." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90063.

Full text
Abstract:
The challenge of achieving a clean and stable combustion in modern power plants or aero engines leads to develop new technologies and new combustors. Pioneer work on ‘flameless’ combustion has shown the great potential of such a technology for meeting modern requirements in term of safety and low emissions. The idea behind this technique is to ensure low emissions by operating at very low fuel/air equivalence ratio but with high preheating to stabilize the combustion. In addition, a careful design of the combustor should ensure that fresh gases are diluted by hot exhaust gases. The result is a
APA, Harvard, Vancouver, ISO, and other styles
7

Lampert, Dieter, Robert F. Steele, Markus Rosenfelder, and Salvatore DellaVilla. "Equivalent Availability Measurement for Combined-Cycle Power Plants: A New Approach." In ASME Turbo Expo 2001: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-gt-0579.

Full text
Abstract:
The Equivalent Availability Factor (EAF) is the most important RAM characteristic in statistics for benchmarks and guarantees for power plants. It represents an energy ratio of the amount available in a period and the theoretical maximum. Representing the impact of scheduled and forced outages of components along with any deratings, a large number of parameters are involved from design, operation to the environment. In 1993, ABB and SPS commenced a cooperation on the fields of data procurement and recording. ABB brought large experience as a power plant supplier, SPS its competence as the lead
APA, Harvard, Vancouver, ISO, and other styles
8

Biagioli, F., P. Schiessel, and L. Fischer. "Investigation of Flame Stability Characteristics of the EV Burner on the GT13E2 Engine." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50274.

Full text
Abstract:
The development and optimization of dry low NOx combustors for industrial gas turbines could largely benefit from better understanding of the way the burners stabilize lean premixed turbulent flames. This has motivated the present work where the stabilization properties of turbulent (partially) premixed flames in the annular combustor of the ALSTOM GT13E2 gas turbine equipped with the EnVironmental (EV) burner are studied. The study benefits from the results of a previous analysis where the flame anchoring properties have been determined in single EV burner configuration, using a one-dimension
APA, Harvard, Vancouver, ISO, and other styles
9

Drennan, Scott A., Chen-Pang Chou, Anthony F. Shelburn, et al. "Flow Field Derived Equivalent Reactor Networks for Accurate Chemistry Simulation in Gas Turbine Combustors." In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59861.

Full text
Abstract:
A method has been developed in which the flow field predicted by Computational Fluid Dynamics (CFD) is automatically condensed into an Equivalent Reactor Network (ERN), composed of well stirred reactors, allowing rapid and accurate analysis of emissions. This paper presents the effectiveness of utilizing an ERN that is a direct abstraction of the computational flow field for combustion analysis. The CFD results are divided into reactors using various filters on flow-field variables to construct an ERN that represents the 3-D combustor flow field and flame structure. Detailed kinetics can then
APA, Harvard, Vancouver, ISO, and other styles
10

Yoon, JeongJung, and HeonSeok Lee. "The Study on Development of Low NOx Combustor With Lean Burn Characteristics for 20 kW Class Microturbine." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53200.

Full text
Abstract:
In order to reduce NOx emissions for the 20kW class microturbine under development, the low NOx characteristics were investigated as an application of the lean burn premixed combustion technology. This study was performed under the conditions of high temperature and high pressure. The compressed air of 2.5bar, 3.0bar, and 5.0bar with temperature of 560K was supplied to the combustor through the preheater. The exhaust air was sampled and measured at the immediate exit of the combustor. It is found that NOx increased while CO decreased as increasing inlet air temperature and pressure. NOx decrea
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Land equivalent ratio (LER)"

1

Fernandes, R., M. Maloley, and F. Canisius. Relationship between leaf area index and Landsat Operational Land Imager equivalent reduced simple ratio vegetation index for the Athabasca oil sands region, northern Alberta. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/308333.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Land equivalent ratio (LER)' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography