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Calorimeter

About: Calorimeter is a research topic. Over the lifetime, 5878 publications have been published within this topic receiving 77157 citations.


Papers
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Journal ArticleDOI
C. Adloff1, J. Blaha1, J. J. Blaising1, C. Drancourt1  +164 moreInstitutions (28)
TL;DR: In this article, the energy resolution of a 1 m3 analogue scintillator-steel hadronic calorimeter was investigated using charged pions with energies from 10 GeV to 80 GeV at the CERN SPS.
Abstract: The energy resolution of a highly granular 1 m3 analogue scintillator-steel hadronic calorimeter is studied using charged pions with energies from 10 GeV to 80 GeV at the CERN SPS. The energy resolution for single hadrons is determined to be approximately 58%/sqrt(E/GeV}. This resolution is improved to approximately 45%/sqrt(E/GeV) with software compensation techniques. These techniques take advantage of the event-by-event information about the substructure of hadronic showers which is provided by the imaging capabilities of the calorimeter. The energy reconstruction is improved either with corrections based on the local energy density or by applying a single correction factor to the event energy sum derived from a global measure of the shower energy density. The application of the compensation algorithms to Geant4 simulations yield resolution improvements comparable to those observed for real data.

60 citations

Journal ArticleDOI
TL;DR: In this article, the first law of thermodynamics and boundary value problem were used to describe heat flow in the calorimeter. But the analysis was limited to the case of laser power and energy measurements in a constant temperature environment, and the analysis showed how time-temperature data can be used to allow for the temperature gradient and the heat exchange.
Abstract: Laser power and energy measurements are commonly made in calorimeters operating in a constant temperature environment. Calorimeters of this type are analyzed in terms of the first law of thermodynamics and the boundary value problem describing heat flow in the calorimeter. This theory of the measurement suggests design features of the calorimeter, sources of error to be avoided in design and operation, and tests to demonstrate experimentally the adequacy of the design. The analysis shows how time—temperature data can be used to allow for the temperature gradient on the calorimeter and the heat exchange due to transients in the temperature.

60 citations

Journal ArticleDOI
M.W Whitmore, J.K Wilberforce1
TL;DR: In this paper, the authors compared self-accelerating decomposition temperatures derived from accelerating rate calorimetry measurements and heat accumulation or Dewar tests with those from the definitive United States self accelerating decomposition temperature test.
Abstract: Self-accelerating decomposition temperatures derived from accelerating rate calorimetry measurements and heat accumulation or Dewar tests are compared with those from the definitive United States self-accelerating decomposition temperature test. Neither simulation is biased on average relative to the United States test. However, the use of the accelerating rate calorimeter, as recently proposed, or the Dewar test, as currently recommended, to estimate self-accelerating decomposition temperatures requires wide safety margins to be applied. Closer and more consistent agreement with US test results is achieved by estimating self-accelerating decomposition temperatures from accelerating rate calorimeter and thermal activity monitor data together.

60 citations

Journal ArticleDOI
Ichiro Hatta1
TL;DR: The thermal relaxation method is used to measure heat capacities of small samples in the temperature range around room temperature by using a calorimeter to measure under heat exchange gas.
Abstract: The thermal relaxation method is used to measure heat capacities of small samples in the temperature range around room temperature. The calorimeter is designed to measure under heat exchange gas and a steplike excess heat is applied to the sample by irradiation from a lamp.

60 citations

01 Jan 2000
TL;DR: A semi-empirical model to represent compressor performance has been investigated in this article, which is based on the concept of volumetric efficiency and assumes a polytropic compression process.
Abstract: Mass flow rate and power calorimeter test data for domestic refrigerator/freezer fully hermetic compressors have been collected on compressors from three manufacturers. The calorimeter test data were taken by 10 different organizations. These test data are commonly correlated with 10-coefficient polynomials (using the method presented in ARI Standard 540-91) as a function of the saturated evaporator and condenser temperatures. In general, these polynomial representations accurately represent the experimental data but do not necessarily provide reliable interpolations or extrapolations for conditions not represented in the compressor calorimeter tests. A semi-empirical model to represent compressor performance has been investigated. The model is based on the concept of volumetric efficiency and assumes a polytropic compression process. The model has five parameters that must be determined by fitting experimental data. Four or more measurements of refrigerant flow rate and compressor power were found to be sufficient to determine the model parameters, thereby allowing the generation of accurate compressor maps with the model. The model has been found to extrapolate within 5% error with condensing and evaporating temperatures that extend beyond the measured data by 10 °C (18°F). A small set of available data for suction temperatures other than 32.2°C (90°F) were investigated. The results indicate that the model can accurately model the effect of changes in the suction temperature.

60 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20224
202193
2020142
2019113
2018150
2017160