distributed temperature Articles

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 ...

Aug. 10, 2009

By Inderscience Publishers

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 ...

May 1, 2014

By IC Controls Ltd.

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. ...

May 11, 2006

By Inderscience Publishers

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 ...

Sep. 1, 2010

By Inderscience Publishers

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 ...

Jun. 21, 2013

By IWA Publishing

Experimental and Numerical Studies on Longitudinal Smoke Temperature Distribution Upstream and Downstream from the Fire in a Road Tunnel

Four full-scale tests are conducted in a real road tunnel, with ceiling jet temperature distributions measured 200 m upstream and downstream from the fire. Two sizes of pool fires, 1.8 and 3.2 MW, with two different fire surface heights, 0.2 and 1.7 m from the floor level, are considered. Longitudinal ventilation velocities are also varied. The experimental data obtained in these four tunnel fire ...

Jan. 2, 2007

By SAGE Publications Ltd

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 ...

Aug. 2, 2015

By Camlab Limited

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 ...

Mar. 1, 2008

By SAGE Publications Ltd

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 ...

Jan. 4, 2019

By American Meteorological Society

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 ...

Jan. 1, 2012

By Inderscience Publishers

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 ...

Jan. 25, 2012

By Inderscience Publishers

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 ...

Oct. 9, 2008

By Inderscience Publishers

Gypsum Board in Fire — Modeling and Experimental Validation

The thermal behavior of a commercially widespread gypsum board (810 kg/m 3) under fire condition has been investigated. For this purpose two 12 mm thick gypsum boards are subjected to the standard fire ISO 834 and the temperature distribution within them is measured by means of thermocouples placed at different depths in the samples. The results hereof are used to validate a numerical model based ...

May 1, 2007

By SAGE Publications Ltd

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 ...

Jul. 29, 2013

By Inderscience Publishers

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 ...

May 29, 2014

By Inderscience Publishers

Effect of a separate heater structure for crystallisation to enable multilevel storage phase–change memory

The effect of a separate–heater structure for crystallisation to enable multilevel storage for phase–change memory (PCM) device was investigated. This separate–heater is characterised by a constant resistant Rh. Existing power from the heater layer (TiSi3) can be well controlled, enabling crystallisation process for multilevel storage. Ge2Sb2Te5 (GST) was used as the memory layer. A simulation ...

Apr. 21, 2014

By Inderscience Publishers

Searching for storm water inflows in foul sewers using fibre-optic distributed temperature sensing

A major drawback of separate sewer systems is the occurrence of illicit connections: unintended sewer cross-connections that connect foul water outlets from residential or industrial premises to the storm water system and/or storm water outlets to the foul sewer system. The amount of unwanted storm water in foul sewer systems can be significant, resulting in a number of detrimental effects on ...

Nov. 1, 2013

By IWA Publishing

Using distributed temperature sensors to monitor an Antarctic ice shelf and sub-ice-shelf cavity

ABSTRACT. Monitoring of ice-shelf and sub-ice-shelf ocean temperatures represents an important component in understanding ice-sheet stability. Continuous monitoring is challenging due to difficult surface access, difficulties in penetrating the ice shelf, and the need for long-term operation of non-recoverable sensors. We aim to develop rapid lightweight drilling and near-continuous fiber-optic ...

Jan. 21, 2013

By In-Situ, Inc.

Cold Chain Transportation Testing Solutions

Weiss Technik provides cold chain testing chambers and solutions for the transport of vaccines and other temperature sensitive pharmaceutical products. Our test chambers are used to simulate temperatures that products and packaging may encounter during distribution. Cold chain testing refers to a temperature-controlled supply chain for the storage and distribution of products where specific ...

Dec. 1, 2020

By Weiss Technik North America, Inc.

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 ...

Jun. 30, 2008

By Inderscience Publishers

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