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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.


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Journal ArticleDOI
TL;DR: In this paper, the experimental determinations of combustion energies and the standard molar enthalpies of formation of 2-mercaptobenzimidazole, 2-merscobenzothiazole, and 2-MERcaptobensoxazole are presented.

25 citations

Journal ArticleDOI
TL;DR: In this article, a new type of adiabatic jacket and a modified calorimeter designed especially for the measurement of the specific heats of high polymers in the range −20 to +300°C were described.
Abstract: This paper describes a new type of adiabatic jacket and a modified calorimeter designed especially for the measurement of the specific heats of high polymers in the range −20 to +300°C. New features of the adiabatic jacket include the use of two dissimilar metals to increase temperature uniformity and a new method of closing and controlling the temperature of the ends. Calibration data using Al2O3 had an average precision of ±0.07 percent, although the uncertainty in an individual measurement, while ±0.1 percent up to 160°C. may reach ±0.5 percent at 300°C. Further studies of the use of an alternating current watthour meter in calorimetry are reported.

25 citations

Journal ArticleDOI
TL;DR: In this article, a flow mixing unit (calorimetric cell and auxiliary devices) was designed for measuring the enthalpy of mixing or reaction of two fluids (gas+liquid or liquid+liquid).
Abstract: A flow mixing unit (calorimetric cell and auxiliary devices) has been designed for measuring the enthalpy of mixing or reaction of two fluids (gas+liquid or liquid+liquid). The indicator of the heat effect is a differential heat flux calorimeter, SETARAM C-80, allowing measurements at temperatures up to 300°C. The mixing cell is made of a stainless-steel capillary (o.d 1.6 mm, length 2.4m) which is coiled in a cylindrical form and tightly fitted in the thermopile well of the calorimeter. The fluids are delivered from the high pressure piston pumps and circulated through the system at controlled flow rates ranging from 100 to 1500 μL-min−1. The tests were carried out at pressures up to 20 MPa. Special care was taken to allow good thermostatting of fluids entering the mixing cell. Check measurements were made with one liquid-liquid system (C2H5OH+H2O) and one gas-liquid system (CO2+C6H5CH3); our enthalpies of mixing agreed with the literature values in most cases to 2%. For the system ethanol+water the experiments have been also performed at temperature of 250°C and pressures of 15 and 20 MPa. The endothermal mixing effect was higher than expected indicating an increase in the excess heat capacity.

25 citations

Journal ArticleDOI
TL;DR: In this article, the results of tests made on two types of uranium/liquid argon calorimeter modules, one electromagnetic and one hadronic, constructed for the D0 detector at the Fermilab Tevatron Collider.
Abstract: We present the results of tests made on two types of uranium/liquid argon calorimeter modules, one electromagnetic and one hadronic, constructed for the D0 detector at the Fermilab Tevatron Collider. For electrons and hadrons with energies between 10 and 150 GeV, we present measurements of energy resolution, linearity of response, electromagnetic to hadronic response ratio ( e π ), and longitudinal hadronic shower development. We have also investigated the effects of adding small amounts of methane to the liquid argon.

25 citations

Journal ArticleDOI
TL;DR: In this paper, a larger cone heater for the cone calorimeter has been developed in order to measure the rate of heat release from building materials, including wood-based materials, gypsum board, wall coverings and plastics.
Abstract: A larger cone heater for the cone calorimeter has been developed in order to measure the rate of heat release from building materials. The aim was to facilitate the testing of inhomogeneous materials and to minimize edge effects. Specimens of two different sizes, 100 × 100mm and 200 × 200mm, were tested in the horizontal orientation. The maximum rate of heat release and the average rate of heat release during 1 min after ignition are generally higher for the larger specimens than for the smaller ones. The time to ignition is generally shorter for larger specimens. Results from tests with 13 different building materials, including wood-based materials, gypsum board, wall-coverings and plastics, are presented at different heat flux levels up to 75 kW m−2.

25 citations


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