Estimating scalars from spectral radiation measurements in a homogeneous hot gas layer

2004 ◽  
Vol 137 (1-2) ◽  
pp. 222-229 ◽  
Author(s):  
Jongmook Lim ◽  
Yudaya Sivathanu ◽  
Jun Ji ◽  
Jay Gore
Keyword(s):  
Spectral Radiation ◽  
Hot Gas ◽  
Gas Layer ◽  
Radiation Measurements

scholarly journals Development of a Daily Databank of Solar Radiation Components for Moroccan Territory

2019 ◽  
Vol 2019 ◽  
pp. 1-20 ◽  
Author(s):  
Mohammed Benchrifa ◽  
Hajar Essalhi ◽  
Rachid Tadili ◽  
Mohammed N. Bargach ◽  
Abdellah Mechaqrane
Keyword(s):  
Solar Radiation ◽  
Global Radiation ◽  
Global Solar Radiation ◽  
The Other ◽  
Correlation Equations ◽  
Spectral Radiation ◽  
Solar Systems ◽  
Statistical Indicators ◽  
Radiation Measurements ◽  
Estimation Models

The main objective of this work is to create a daily updated database that includes all components of solar radiation, either energetic or spectral radiation. This will lead us to quantify the Moroccan solar potential and to determine the dimensions of all types of solar thermal and photovoltaic systems. Consequently, the obtained database will be the fundamental support for engineers, designers, and all organizations interested in developing solar systems, in different regions throughout Morocco. It will also be a basic tool for researchers in modelling and simulating the new solar systems. Firstly, we used one year’s worth of measurements of the different components of the solar radiation, provided by the National Meteorological Department, to establish the extrapolation equations between the global radiation at the reference site and the global radiation of twenty-eight other sites. As well as with the same measurements, we developed the correlation equations between the global solar radiation and the other solar radiation components. Secondly, from ten years of Fez station’s daily global radiation measurements and through the extrapolation equations, we were able to estimate the global radiation of all Moroccan cities. Then, by using the obtained global radiation data and the correlation equations, we predicted the other components of solar radiation. Subsequently, with a new measurement campaign carried out on several sites, we validated the estimation models by using the usual statistical indicators. In addition, we compared our results with those obtained by other estimation models. The resulting differences for each solar component display the advantage of our model with errors under 6%. To facilitate the use of our results, we compiled them into maps representing the spread of solar radiation across Morocco.

On the Use of Metal Sheathed Thermocouples in a Hot Gas Layer Originating from a Room Fire

1995 ◽  
Vol 13 (4) ◽  
pp. 257-260 ◽  
Author(s):  
J.C. Jones
Keyword(s):  
Hot Gas ◽  
Gas Layer

The Forum is intended to provide for dialogue and discussion among fire experts, scientists and consultants. Contributions to The Forum will not be refereed in the conventional sense, but will be subject to review by the Journal's Editorial Board relative to appropriateness, clarity, timeliness, and scope of interest. The Editorial Board will be the sole judge of those contributions to be published. Opinions expressed, however, are those of the authors and not of the Editors or Technomic Publishing Com pany, Incorporated.

INFLUENCE OF THE FIRE SOURCE POSITION ON THE HOT GAS LAYER TEMPERATURE IN A MULTI-COMPARTMENT SCENARIO

2020 ◽  
Author(s):  
Rodolfo Prediger Helfenstein ◽  
Calisa Katiuscia Lemmertz ◽  
Felipe Roman Centeno
Keyword(s):  
Source Position ◽  
Hot Gas ◽  
Fire Source ◽  
Gas Layer

Turbine Inlet Gas Temperature Sensor

1999 ◽  
Author(s):  
W. Michael Glasheen ◽  
Charles A. DeMilo ◽  
Yudaya R. Sivathanu
Keyword(s):  
Optical Fibers ◽  
Temperature Sensor ◽  
Narrow Band ◽  
Calculation Model ◽  
Gas Temperature ◽  
Spectral Radiation ◽  
Hot Gas ◽  
Spectral Bands ◽  
Look Up Table ◽  
Turbine Inlet

A practical turbine inlet gas temperature sensor (TIGTS) has been designed, fabricated and evaluated both numerically and experimentally. The sensor remotely measures the hot gas spectral radiation intensities at several discrete wavelengths and obtains the Planck-function weighted temperature of the optical path using a look-up-table. A high temperature optical head collects the radiation intensities emitted by hot gases along a narrow path. The radiation is transmitted using optical fibers to a quadrant detector which measures the intensities at four discrete wavelengths within the spectral bands of water vapor and carbon dioxide. After analog signal processing, under microprocessor control, the signals are digitized. They are input to a look-up-table which was obtained with stochastically generated gas concentrations and temperatures in conjunction with the narrow-band radiation calculation model, RADCAL.

Sign in / Sign up

Export Citation Format

Share Document