distributed temperature Articles
-
Entropy generation analysis in a slab with non-uniform heat generation subjected to convection cooling
Entropy generation in a rectangular slab with a non-uniform internal heat generation is investigated. A non-dimensional analysis of the local and total entropy generation during steady state heat conduction through the slab is presented. The external surfaces of the slab are subjected to asymmetric convection cooling by the surrounding medium. Analytical temperature distribution within the slab ...
-
Application of temperature-distribution models to evaluate the energy and exergy of stratified thermal storages
Vertical stratification occurs in many thermal energy storages, and is often promoted to increase efficiency. Six temperature-distribution models for vertically stratified Thermal Energy Storage (TES) systems are described and applied for determining their energy and exergy efficiencies. The models are Linear, Stepped, Continuous-linear, Basic Three-zone, General Three-zone and General-linear. ...
-
The Application and Development of the Bottom Blowing Copper Smelting Process
Abstract In 1967, the steel industry realized bottom blowing process after the shrouded injector had been invented by Canadian Guy Savard and Robert G.H.Lee. While in the nonferrous metallurgical industry, top blowing] process was industrial applied in Australia in 1987. And side blowing Noranda process went into industrial production in Canada in 1973. Then in 1991 the pilot test of bottom ...
-
Effect of temperature on threshold current density in InP/AlGaInP quantum dot laser structures
The authors have grown self-assembled InP quantum dot lasers on GaAs substrate by MOVPE with 750°C growth temperature. The operating temperature has a distinctive effect on the threshold current density. The authors have measured the threshold current density between 190-350K. At low temperatures, the threshold current increases with temperature, reaches a local maximum and then decreases for ...
-
Critical insulation thickness for maximum entropy generation
Critical insulation thickness is known to refer to the insulation thickness that maximises the rate of heat transfer in cylindrical and spherical systems. The same analogy is extended to the rate of entropy generation in the present study. The possible critical insulation thickness that yields a maximum rate of entropy generation is investigated. Entropy generation is related to heat transfer ...
-
Critical insulation thickness for maximum entropy generation
Critical insulation thickness is known to refer to the insulation thickness that maximises the rate of heat transfer in cylindrical and spherical systems. The same analogy is extended to the rate of entropy generation in the present study. The possible critical insulation thickness that yields a maximum rate of entropy generation is investigated. Entropy generation is related to heat transfer ...
-
Temperature evolution of an experimental salt-gradient solar pond
A salt-gradient solar pond is a low-cost, large-scale solar collector with integrated storage that can be used as a source of energy in low-grade-heat thermal desalination systems. This work presents the thermal evolution of an experimental solar pond for both the maturation and heat extraction time periods. The temperature profile was measured every 1.1 cm using a vertical high-resolution ...
-
Radiative Heat Transfer for Structural Members Exposed to Fire: An Analytical Approach
An analytical approach, as a reduced form of the more general multi-flux and discrete ordinates method for radiative transfer, is proposed in this article with clarified theoretical basis. The main assumption inherent in the proposed method is that the radiation intensities along positive and negative paths are isotropic and have constant values in each direction. A realistic nonisothermal ...
-
Heat transfer and entropy generation in a two-dimensional orthotropic convection pin fin
The paper uses a two-dimensional heat conduction model to obtain the thermal performance and entropy generation in an orthotropic pin fin used in advanced light weight heat sinks. The analytical expressions for the distribution and heat transfer rates are used to generate the thermal performance graphs that are of general applicability unlike the results for specific cases reported so far. The ...
-
Entropy generation in an asymmetrically cooled hollow sphere with temperature dependent internal heat generation
This paper presents an entropy generation analysis for steady conduction in a hollow sphere with temperature dependent internal heat generation and asymmetric convective cooling. An exact analytical solution for the temperature distribution is used to compute dimensionless local and total entropy generation rates in the hollow sphere. The total entropy generation rate depends on reference heat ...
-
Muse-Tech – EU-Project - Case Study
The concept of MUSE-Tech project is the integration of three High-End sensing technologies Photoacoustic Spectroscopy, Quasi Imaging UV-Vis Spectrometry and Distributed Temperature Sensing in a versatile Multi Sensor Device (MSD), for real-time monitoring (on-line or in-line) of multiple parameters associated with the quality and the chemical safety of raw and in-process ...
By Gasera Ltd
-
Entropy generation in an asymmetrically cooled hollow sphere with temperature dependent internal heat generation
This paper presents an entropy generation analysis for steady conduction in a hollow sphere with temperature dependent internal heat generation and asymmetric convective cooling. An exact analytical solution for the temperature distribution is used to compute dimensionless local and total entropy generation rates in the hollow sphere. The total entropy generation rate depends on reference heat ...
-
A Dynamical Perspective on Atmospheric Temperature Variability and its Response to Climate Change
The atmospheric temperature distribution is typically described by its mean and variance, while higher order moments, such as skewness, have received less attention. Skewness is a measure of the asymmetry between the positive and negative tails of the distribution, which has implications for extremes. It was recently shown that near-surface temperature in the southern hemisphere is positively ...
-
How do Memmert ovens and incubators ensure optimum temperature distribution?
The German manufactured Memmert range of ovens and incubators are known for their high quality materials, state of the art technology and high accuracy. But did you know they also use their extensive knowledge and experience to ensure all their units offer uniform temperature distribution, even when heavily loaded… For vital tasks it is important to know that the temperatures in your ...
-
Assessment of detection limits of fiber-optic distributed temperature sensing for detection of illicit connections
Distributed temperature sensing (DTS) with fiber-optic cables is a powerful tool to detect illicit connections in storm sewer systems. High-frequency temperature measurements along the in-sewer cable create a detailed representation of temperature anomalies due to illicit discharges. The detection limits of the monitoring equipment itself are well-known, but there is little information ...
-
Temperature distribution and the cooling effects on three urban parks in Ankara, Turkey
In this study, the effects of urban parks on temperature were investigated in the case of three urban parks (Altınpark, Gençlik Park and Kurtuluş Park) of different sizes and supporting different plant densities and distributions in urban areas of Ankara City, Turkey. Local microscale temperature changes caused by green areas within park boundaries and park vicinities exhibited differences ...
-
Using exergy to assess air pollution levels from a smokestack ? Part 2: illustration and methodology extension
Exergy is proposed in a companion paper as a standard for the properties and potential impacts of pollutants from smokestacks, and a method was developed for exergy distributions of such pollutants. Here, the method is applied to an illustrative example. The results include spatial distributions of temperature, pollutant concentration and exergy parameters. Exergy is seen to provide an assessment ...
-
Simulation of foundry environment for improving occupational exposure to heat stress conditions
A worker in a foundry, especially near the furnace, is affected by several heat-related adverse health outcomes arising from non-ionising radiation emitted by molten metal. Such workers are likely to be affected by heat cramps, exhaustion, stroke, etc. Hence, the design of a proper furnace environment is an important issue to avoid these health hazards. In this study, the furnace environment is ...
-
Computation of thermal condition in an induction motor during plugging
The problem of two–dimensional heat flow in the stator of induction motor is solved by use of a finite element formulation and arch–shaped elements in the r–θ plane of the cylindrical coordinate system. The shape functions and exact solution matrices are derived algebraically for utmost economy in computation. The temperature distribution has been determined considering convection from the stator ...
-
Connection between urban heat island and sky view factor approximated by a software tool on a 3D urban database
This study provides a review on methods of Sky View Factor (SVF) determination and intra-urban surface geometry-air temperature relationship. Then, a software-based method of SVF estimation from a 3D database, describing urban surface elements, is applied. Finally, related investigations in Szeged and importance of the results obtained are discussed. Previous investigations were limited to only ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you