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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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TL;DR: In this article, the energy of the reaction between F2g and UPd3(c) to give Pd(PdF6)(c), about 15 mass per cent Pdc and UF6(g), has been measured in a bomb calorimeter.
29 citations
TL;DR: In this paper, the design of new high pressure equipment for structural and dynamical studies on samples in solution is described, and two sample cells for applying pressures up to 150 and 700 MPa (i.e. 1.5 and 7 MPa), respectively, are mounted on special sticks and inserted into the calorimeter of a cryostat to regulate the temperature.
Abstract: The design of new high pressure equipment for structural and dynamical studies on samples in solution is described. We present two sample cells for applying pressures up to 150 and 700 MPa (i.e. 1.5 and 7 kbar), respectively. These cells are mounted on special sticks and inserted into the calorimeter of a cryostat to regulate the temperature. Different parts of the equipment – the pressure controller, the sticks and the cells – are described. In addition, radiography tests which were performed with neutrons in situ at the Institut Laue Langevin to verify the tightness of the cells and the hydrostatic transmission of the pressure to the sample are presented. First results on model lipids are in agreement with former results by R. Winter et al. [Towards an understanding of the temperature/pressure configurational and free-energy landscape of biomolecules, J. Non-Equilib. Thermodyn. 32 (2007), pp. 41–97].
29 citations
Patent•
03 Jul 1991TL;DR: In this paper, a direct convective air flow calorimeter is proposed to measure sensible and insensible heat losses, and may measure indirect heat losses as well, which can be scaled to accommodate animal as well as human subjects.
Abstract: A direct convective air flow calorimeter characterized by fast response time, high efficiency, and transient, as well as steady state, heat measurement capability. The calorimeter generally measures sensible and insensible heat losses, and may measure indirect heat losses as well. The calorimeter can be scaled to accommodate animal as well as human subjects. The convective calorimeter includes an adiabatic chamber wherein circulatory air flow is provided about the inner periphery of the chamber while baffles are used to shield the subject from the circulatory air flow. The chamber is also provided with ventilating air flow. Finally, sensors are used for determining the heat addition to the circulatory air flow, which represents the sensible heat loss from the subject being tested, and for determining selected properties of the ventilating air flow.
29 citations
TL;DR: In this paper, an infrared camera is used to deduce the heat flux produced by the chemical reaction from the processing of temperature fields, and continuous experiments are performed with a very good control of the reagents mixing.
Abstract: The aim of this work is to present an infrared calorimeter for the measurement of the kinetics and the enthalpy of high exothermic chemical reactions. The main idea is to use a millifluidic chip where the channel acts as a chemical reactor. An infrared camera is used to deduce the heat flux produced by the chemical reaction from the processing of temperature fields. Due to the size of the microchannel, a small volume of reagents (ml) is used. As the chemical reagents are injected by a syringe pump, continuous experiments are performed with a very good control of the reagents mixing. A specific injection system enables to perform two flow configurations: co-flow and droplets. Thanks to the thermal isoperibolic conditions, the chemical reaction can be easily characterized with a previous specific calibration. Here, the gradual mixing by species diffusion and the enthalpy of a strong acid base reaction are monitored in co - flow configuration.
29 citations
01 Jan 1984
TL;DR: In this article, a heat release rate calorimeter devexoped at the National Bureau of Standards was used to measure the fire performance of a wide range of furnishings.
Abstract: A 200-word or less factual summary of most significant information. If document includes a significant bibliography or literature survey, mention it here) A heat release rate calorimeter devexoped at the National Bureau of Standards was used to measure the fire performance of a wide range of furnishings. The heat release rates measured in the calorimeter are determined through the use of oxygen consumption techniques. Data are presented on the free burning characteristics of 28 tests involving 23 different types of furnishings. The furnishings evaluated are classed into the following groups: easy chairs, sofas, waiting room and patient chairs, wardrobe closets, bookcase and bedding. The information presented in this report will provide a basis for selecting types of furniture to be used in health care facilities, hospitals and other living facilities. The test results also provide information needed by other areas of fire research, such as the study of fire growth in compartments and mathematical modeling of fire development. In addition to heat release rates, data are given on the rates of mass loss, thermal radiation and smoke production from the burning furniture specimens. 12.
29 citations