Water Balances
Mostrando 1-12 de 38 artigos, teses e dissertações.
-
1. RELIABILITY-BASED MULTI-OBJECTIVE OPTIMIZATION APPLIED TO CHEMICAL ENGINEERING DESIGN
ABSTRACT Chemical engineering optimization represents a significant challenge due to the complexity of the mathematical models that are frequently required in this area. These models are normally associated with nonlinear equations that represent mass, energy, and momentum balances, which are submitted to physical, constitutive, environmental, and design lim
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
-
2. Actual evapotranspiration and crop coefficient of sweet orange during the initial development phase in the Rio Largo region, Alagoas
RESUMO: A determinação da evapotranspiração real da cultura (ETa) é importante para o manejo da irrigação. Os principais métodos e modelos físicos de estimativa da ETa requerem dados que não são facilmente disponíveis. Neste trabalho, obteve-se o coeficiente da cultura (Kc) da laranja lima na fase inicial de desenvolvimento e avaliou-se o desemp
Cienc. Rural. Publicado em: 30/05/2019
-
3. Mass balances of major solutes, nutrients and particulate matter as water moves through the floodplains of the Pantanal (Paraguay River, Brazil)
RESUMO Na Bacia do Alto Paraguai, formadora do Pantanal Mato-grossense, uma das maiores áreas úmidas do mundo, os rios fazem a conexão entre o planalto e a extensa planície de inundação. Agropecuária, potencial erosivo associado a desmatamento elevado, efluentes urbanos e dezenas de barramentos hidrelétricos no planalto podem alterar o transporte de
RBRH. Publicado em: 04/02/2019
-
4. Contribution of nitrogen from sugarcane harvest residues and urea for crop nutrition
Sugarcane (Saccharum spp.) harvested without burning provides a substantial amount of remains (trash) on soil profiles which can be decomposed and release nutrients contributing to reduce fertilizer needs. The contribution of nitrogen (N) from sugarcane plant residues and fertilizer in sugarcane nutrition was assessed. Plant cane treatments were micro plots
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-10
-
5. Proposta e comparação de um modelo fenomenológico com base em alto transporte de massa e supersaturação para torre de resfriamento de água. / Presentation and comparison of a model based in high mass transfer and supersaturation in a cooling water tower.
Cooling towers are equipment widely used in industrial plants, where these operate under severe conditions such as cooling water inlet temperatures above 50oC. Under this condition, there are high evaporation of water and high mass transfer, generally not considered in performance analysis of a cooling tower. This work presents and analyzes the differences b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
-
6. Modelling of acid mine drainage (AMD) in columns
A model is proposed in this paper to describe the generation of acid mine drainage (AMD) in leaching columns. The model considers: (i) Water flow through the column, which is calculated using the 1 - D analytic solution of the Richards' equation assuming the existence of a similarity relationship between the water retention function and the water content pro
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
-
7. Evapotranspiration determination by the methods of water and the chloride balances and the quantification of canopy interception in the Atlantic Forest: São Paulo, SP and Cunha, SP / Determinação da evapotranspiração pelos métodos dos balanços hídrico e de cloreto e a quantificação da interceptação das chuvas na Mata Atlântica: São Paulo, SP e Cunha, SP
The present study aims the quantification of the interception of the rains by the trees canopy and the determination of the real evapotranspiration by the methods of the water and the chloride balances. For that, it was established the monitory of two experimental catchments situated at Dense Ombrófila Forest (Atlantic Forest) one of them, in Parque Estadua
Publicado em: 2009
-
8. Heat and mass transfer in two-phase flow around airfoils with aeronautical anti-ice systems. / Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos.
It is required to prevent ice accretion on wings and horizontal stabilizers because it may cause aerodynamic performance degradation, weight increase, flight control difficulties and, in critical cases, may lead to operational safety margins reduction. When aircraft flies through clouds containnig supercooled water droplets, which are in metastable equilibri
Publicado em: 2009
-
9. Crossbred dairy cows on pasture fed with different supplements on dry-water transition period. / Vacas leiteiras mestiças a pasto alimentadas com diferentes suplementos no período de transição seca-águas ; Palma forrageira
This study evaluated the intake and apparent digestibility of nutrients; production and chemical composition of milk; the additional cost of the supplements; microbial synthesis of nitrogen and rude protein, and their efficiencies; plasma levels of glucose and urea; and excretions of urea in crossbred dairy cows on pasture during the dry-water transition. It
Publicado em: 2009
-
10. Experimental study and mathematical modeling of hybrid solar reactor for phenol degradationby photo-Fenton process. / Estudo experimental e modelagem matemática de reator solar híbrido para degradação de fenol em solução aquosa pelo processo foto-Fenton.
Wastewaters containing hazardous, or recalcitrant organic substances are generated in a wide variety of industrial processes. The inadequate management of these effluents can cause contamination of underground and surface water. Their treatment by conventional processes may not be technically efficient, and usually prevents effluents from being discarded or
Publicado em: 2009
-
11. Qualidade da água e distribuição espacial de foraminíferos bentônicos em estuários das Baías Norte e Sul da Ilha de Santa Catarina (Brasil)
Watersheds with different characteristics lead to different rates of biogeochemical elements that contribute in estuarine systems. Thus, this study investigated the contribution of drainage on the nutrients as well as the responses of benthic foraminifera, with focus on estuarine region of six major systems that discharge in the North and South bays of Santa
Publicado em: 2009
-
12. Determinação da recarga profunda na bacia-piloto do Ribeirão da Onça em zona de afloramento do Sistema Aqüífero Guarani a partir de balanço hídrico em zona saturada / Determination of the deep recharge in the Ribeirão da Onça pilot basin in the outcrop zone of the Guarani Aquifer System through water balance in the saturated zone
Main objective of this work was the determination of the deep recharge in the Ribeirão da Onça basin through water balance in the soil saturated zone. This basin is located in the outcrop zone of the Guarani Aquifer System (GAS) in the São Paulo State - Brazil and is covered by cenozoic sedimentary soil. The water balance model involved the determination
Publicado em: 2008