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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: A micro-bomb combustion calorimeter recently designed for samples of mass ǫ ≥ 80 mg has been improved and tested with m -methoxybenzoic acid in order to verify the chemistry of the combustion process and the accuracy of the energy corrections involved in the analysis of results as mentioned in this paper.

22 citations

Journal ArticleDOI
TL;DR: In this article, the authors measured the temperature rise of a small lithium-ion secondary battery during rapid charge and discharge cycles using their battery thermal behavior model, and confirmed its validity during discharge cycle at current smaller than the discharge rate of 1C.
Abstract: The secondary batteries for an electric vehicle (EV) generate much heat during rapid charge and discharge cycles above the rated condition, when the EV starts quickly consuming the battery power and stops suddenly recovering the inertia energy. During rapid charge and discharge cycles, the cell temperature rises significantly and may exceed the allowable temperature. We calculated the temperature rise of a small lithium-ion secondary battery during rapid charge and discharge cycles using our battery thermal behavior model, and confirmed its validity during discharge cycle at current smaller than the discharge rate of 1C. The heat source factors were measured by the methods described in our previous study, because the present batteries have been improved in their performance and have low overpotential resistance. The battery heat capacity was measured by a twin-type heat conduction calorimeter, and determined to be a linear function of temperature. Further, the heat transfer coefficient was measured again precisely by the method described in our previous study, and was arranged as a function of cell and ambient temperatures. The calculated temperature by our battery thermal behavior model using these measured data agrees well with the cell temperature measured by thermocouple. Therefore, we can confirm the validity of this model again during rapid charge and discharge cycles. © 2006 Wiley Periodicals, Inc. Electr Eng Jpn, 157(3): 17–25, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20249 Copyright © 2006 Wiley Periodicals, Inc.

22 citations

Journal ArticleDOI
TL;DR: In this article, a simple adiabatic calorimeter for specific heat measurements at very low temperatures is described, and liquid helium is made in the cryostat by the Simon expansion method.
Abstract: A simple adiabatic calorimeter for specific heat measurements at very low temperatures is described. Liquid helium is made in the cryostat by the Simon expansion method. The calorimeter and adiabat...

22 citations

Journal ArticleDOI
TL;DR: In this article, the authors studied the enthalpy relaxation of glassy glycerol prepared by quenching of the liquid in a top-loading type adiabatic calorimeter developed by their group.
Abstract: We have studied the enthalpy relaxation of glassy glycerol prepared by quenching of the liquid in a top-loading type adiabatic calorimeter developed by our group. The glassy sample was prepared by plunging the sample cell into liquid nitrogen. The cooling rate, 5 K s −1 , was about 100 times faster than the rate available in ordinary adiabatic calorimeters. The heat capacity of the rapidly quenched glass (RQG) was only slightly different from that of the normally quenched glass (NQG). RQG released much larger enthalpy than NQG and the relaxations started at a much lower temperature than the glass transition temperatures of NQG. We analyzed these data in terms of the Adam–Gibbs theory. We demonstrate that the relaxation is accelerated by the larger configurational entropy (prominent structural disorder).

22 citations

Journal ArticleDOI
Mario Monti1, I. Wadsö1
TL;DR: Heat production in human erythrocytes from healthy subjects has been measured under different experimental conditions and obtained heat effect values for specified standard conditions were within uncertainty limits the same for the different calorimeters.
Abstract: Monti, M. & Wadso, I. Microcalorimetric Measurements of Heat Production in Human Erythrocytes. IV. Comparison between Different Calorimetric Techniques, Suspension Media and Preparation Methods. Scand. J. clin. Lab. Invest. 36, 573–580, 1976.Heat production in human erythrocytes from healthy subjects has been measured under different experimental conditions. Simultaneous measurements were made on the same samples using different types of microcalorimeters: a static ampoule calorimeter, an air perfusion calorimeter, and a flow calorimeter. Obtained heat effect values for specified standard conditions, Pd`, were within uncertainty limits the same for the different calorimeters. Cells were suspended either in autologous plasma or in a phosphate buffer. Pd` values for buffer suspensions were significantly higher than those for plasma suspensions. Erythrocyte samples prepared by the column adsorption technique gave higher Pd` values than those obtained by a conventional centrifugation procedure.

22 citations


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