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Now showing items 1-10 of 2002
Methodology for DSC calibration in high heating rates
(2011-08-01)
Despite the large use of differential scanning calorimetry (DSC) technique in advanced polymer materials characterization, the new methodology called DSC in high heating rates was developed. The heating rate during ...
Does low-protein diet improve broiler performance under heat stress conditions?
(Fundação APINCO de Ciência e Tecnologia Avícolas, 2004-06-01)
Nutrition for broilers under high temperatures is extremely important for brazilian broiler chicken industry because the amounts of consumed nutrients and environmental temperature have great effects on bird performance ...
Respiratory heat loss in the sheep: a comprehensive model
(Springer, 2002-08-01)
A model is presented for the respiratory heat loss in sheep, considering both the sensible heat lost by convection (C-R) and the latent heat eliminated by evaporation (E-R). A practical method is described for the estimation ...
Non-newtonian heat transfer on a plate heat exchanger with generalized configurations
(Wiley-Blackwell, 2007-01-01)
For the configuration optimization of plate heat exchangers (PHEs), the mathematical models for heat transfer and pressure drop must be valid for a wide range of operational conditions of all configurations of the exchanger ...
Coeficiente de operación de un sistema formado por un refrigerador doméstico acoplado a un acumulador de agua caliente para la recuperación de energía
(2012-07-09)
An experimental apparatus containing a domestic refrigerator coupled to a vertical hot water storage tank was used for energy recovery. The original condenser of the refrigerator was maintained, but modified with a concentric ...
Estudo do calo sensível e latente obtidos por intermédio da razão de Bowen em uma cultura de soja irrigada
(2007-07-01)
The goal of this experiment was to study the latent and sensible heat variation determined by Bowen ratio from an irrigated soybean crop. A micrometeorological station with vertical displacement was constructed to maintain ...
Implementation of convective heating in Companhia Siderúrgica Nacional Blast Furnace runners
(2013-01-21)
This paper describes the main characteristics and advantages of convective heating system for refractory lining, compared with conventional heating systems. In addition the main results obtained are presented with its ...
A steady-state model for heat pipes of circular or rectangular cross-sections
(1996-08-01)
The objective of this paper is to present a generalized analytical-numerical model of the internal flow in heat pipes. The model formulation is based on two-dimensional formulation of the energy and momentum equations in ...
Analysis of aluminum plates under heating in electrical and natural gas furnaces
(Elsevier B.V.Elsevier B.V., 2000-10-01)
This paper analyzes the thermal storage characteristics of aluminum plates in furnaces during their heating for lamination under two sources of heat: an electrical resistance bank and a combustion process carried out with ...
Effect of acute heat stress on heat shock protein 70 messenger RNA and on heat shock protein expression in the liver of broilers
(Carfax Publ Co, 1996-05-01)
1. The synthesis of heat shock protein 70 (Hsp70) mRNA and the expression of Hsp70 in the liver of broiler chickens submitted to acute heat stress (35 degrees C for 5 h) was investigated.2. Hsp70 expression was detected ...