Thermal conductivity of Freons F-13V1 and F-23 over a wide range of state parameters

Геллер, В. З.; Gorykin, S. F.; Zaporozhan, G. V.; Voitenko, A. K.

doi:10.1007/bf00867116

Cited by 6 publications

(8 citation statements)

References 3 publications

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“…The liquid phase is generally represented to within 3% at pressures to 60 MPa. The saturated vapor data of Zvetkob et al [72] are represented to within 4%; however the supercritical data and near critical data of Geller et al [71] show larger deviations; in this region the estimated uncertainty is 15%. A dedicated thermal conductivity model, rather than an ECS model may be better able to capture the variation of supercritical thermal conductivity.…”

Section: Discussionmentioning

confidence: 91%

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PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

Huber¹,

Lemmon²

2021

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This report summarizes the results of work performed for US Army GVSC by the National Institute of Standards and Technology (NIST), Applied Chemicals and Materials Division on the development of a computer program for fire-suppressant bottle-filling calculations under interagency agreement number 11478007. The work includes the development of an Excel spreadsheet that is to be used with the NIST23 (REFPROP) to provide two bottle-filling calculations (1) given vessel size, mass of agent, mass of pressurizing agent, and filling temperature compute the filling pressure, and the temperature and pressure conditions at which the fluid in the vessel becomes single phase, and (2) given the vessel size, mass of agent, and filling temperature and pressure, compute the mass of pressurizing fluid, and the temperature and pressure conditions at which the fluid in the vessel becomes single phase. The agents

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Section: Discussionmentioning

confidence: 91%

“…Similarly, the deviations with selected thermal conductivity data [70][71][72][73][74] are shown in Fig. A11 and A12.…”

Section: Discussionmentioning

confidence: 99%

PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

Huber¹,

Lemmon²

2021

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“…The disagreement between theory and experiment does not exceed 3%. for Freons with one carbon atom: a) 1, R11 [9,12]; 2, R12 [9,12]; 3, R13 [10,[12][13][14][15][16]; 4, R14 [16]; 5, R21 [13,17,18]; 6, R22 [9,12]; 7, R23 [8,10]; 8, R32 [27] and b) 1, R11 [9,12]; 2, R12 [9,12]; 3, R13 [10,[12][13][14][15][16]; 5, R21 [13,17,18]; 6, R22 [9,12]; 7, R23 [8,10]; 8, R32 [27]. for freons with two carbon atoms: a) 1, R113 [10,12,14,18,28,29,32,33…”

Section: T T T T T T Tmentioning

confidence: 99%

“…Thermal Conductivity of the Gas. The processing of experimental data [3][4][5][6][7][8][9][10][11] on λ g in the form…”

mentioning

confidence: 99%

Method of Construction of Generalized Temperature Dependences of the Thermal Conductivity of Freons in Various States of Aggregation

Arutyunov

Козлов

2019

J Eng Phys Thermophy

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A method of construction of generalized dependences of the reduced thermal conductivity of Freons on their temperature on saturation lines of a liquid and a vapor and at a pressure of 0.1 MPa has been constructed, which is based on the principle of minimization of the Helmholtz free energy. Selection of the scale of the sought function and of its arguments was carried out from the characteristic-function minimum, which has permitted obtaining calculation formulas to determine the sought properties of the substances under study with an error not exceeding the experimental error.

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“…Interestingly, an uncertainty estimate of 5 yo is given in the TPRC for kCSHB at the temperature of interest to this study. I n the case of CF,Br we have used a value of k taken from an earlier (ASHRAE 1976) handbook and have ignored a later measurement (Geller et al 1975) of kCFaBr which gives a value which is 4.7 yo greater.…”

Section: W M Pitts and B J Mcca8reymentioning

confidence: 99%

Response behaviour of hot wires and films to flows of different gases

Pitts

McCaffrey

1986

J. Fluid Mech.

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Measurements of the voltage output for hot-wire and film anemometers placed in flows of nine different gases have been made as a function of flow velocity. It has been possible to correlate the measurements quite accurately by treating the data in terms of suitably defined Reynolds and Nusselt numbers. In order to obtain these correlations it has been necessary to consider and correct for the effects of probe-end conduction losses, temperature dependencies of gas molecular properties, flow slip at the probe surfaces, and gas accommodation. With the exception of the results for helium (for which accommodation effects are strong), the most important correction is shown to be that for the different temperature dependencies of the gas molecular properties. This finding is contrasted with previous studies which have assumed that the largest effect among different gases was due to variations in the Prandtl number. The importance of the nature of the flow over the cylindrical devices to the heat transfer behaviour is described. A previously unreported hysteresis in the heat transfer behaviour for Re ≈ 44 has been characterized and attributed to the presence or absence of eddy shedding from the heated cylinder.

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Thermal conductivity of Freons F-13V1 and F-23 over a wide range of state parameters

Cited by 6 publications

References 3 publications

PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

Method of Construction of Generalized Temperature Dependences of the Thermal Conductivity of Freons in Various States of Aggregation

Response behaviour of hot wires and films to flows of different gases

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