Heat generation data

For non-Newtonian liquids and suspensions, an apparent viscosity is determined using correlations which include power input and the Reynolds number. Scale-up comparisons based on heat generation data only were determined by comparison of results from RC1 experiments and from a 675-liter reactor [208]. In the experiments, a Bingham plastic fluid was used to determine the film heat transfer coefficient. This presents a worst case because of the low thermal conductivity of the Bingham plastic. Calculated inside film heat transfer coefficients determined in the RC1 tests were about 60% lower than the values determined in the pilot plant reactor, even though substantial effort was made to obtain both geometric and kinematic similarity in the pilot reactor. 

Verhoeff, J. and A. H. Heemskerk, "Gas Production and Heat Generation Data Concerning the Thermal Runaway of Liquid Reaction Systems," I. Chem. Eng. Symposium Series, 85 (1984). 

All we have to do to accomplish this purpose is to know the rate of heat generation in the chemical, in concrete terms, the heat generation data of the chemical, and, the rate of heat transfer from the chemical, having an arbitrary shape and an arbitrary size, placed in the atmosphere under isothermal conditions, to the atmosphere, in concrete terms, the heat transfer data of the chemical, in the early stages of the self-heating process, respectively. 

For the heat generation data of a chemical of the TD type, irrespective of liquid and powdery, including every gas-permeable oxidatively-heating substance, refer to Sections 2.4. 

It is thought, therefore, that the variables which characterize the reduced form of the F-K equation are not the heat generation data of a powdery chemical of the TD type but the heat transfer data of the chemical, i.e., the effective thermal diffusivity, the shape factor, and the radius, r. 

On account of this effect, the value of 7 ,. calculated by substituting the heat generation data, which are calculated based on the experimental data obtained with the glass closed cell in the adiabatic self-healing test, into Eq. (72) derived... 

Three values of the BAM test for BPO calculated each by substituting the three pairs of heat generation data, which are each calculated based on the experimental data obtained each with the three kinds of cells, which are referred to in Fig. 42, in the test, into Eq. (72) are presented in Table 4, assuming that 400 cm each of three samples of BPO are each charged in the 500 cm Dewar flask used in the BAM heat-accumulation storage test and are each placed in the atmosphere under isothermal conditions, keeping the other conditions constant. 

The result of the regression analysis to calculate the heat generation data of TBPB, i.e., the values of the two coefficients, a and b, of Eq. (44), nAt = alT, + b, holding for the self-heating process, in the early stages, of 2 cm of TBPB charged in the open-cup cell and subjected to the adiabatic self-heating test, is presented in Table 6. 

The result of the regression analysis applied, in order to calculate the heat generation data of TBPB, to five combinations of the value of In t with that of 1/T, which are each determined, based on five digital records obtained each from five adiabatic selfheating tests, which are started from each T,. in the range of 73.18 to 79.62 °C with mutual intervals of 1 2 K, performed each, for 2 cm each of five samples of TBPB charged each in the open-cup cell, for the time, A t, required for the temperature of each sample of TBPB to increase by the definite value of AT of 1.25 K from the corresponding T,. Data used are in common with those presented in Fig. 45 and plotted in Fig. 46. 

It is also of course possible to calculate the A for an arbitrary volume of a liquid confined in an arbitrary closed container and placed in the atmosphere under isothermal conditions by applying the reduced form of the Semenov equation. It is, however, required in such a case to obtain both the heat generation data and the heat transfer data of the liquid under confined conditions. In this connection, the adiabatic self-heating tests were performed, in the present chapter, at atmospheric pressure for nine organic liquid peroxides, other than DTBP, respectively, because these nine peroxides are not very volatile or do not decompose to evolve corrosive and/or toxic gases while tested, respectively. 

And actually, it has been substantiated that it is possible to calculate the Tc for an arbitrary volume of a liquid charged in an arbitrary container and placed in the atmosphere under isothermal conditions, by substituting both the heat generation data of the liquid, which are calculated based on the experimental data obtained in temperature differences of 1.25 K between the Tu and the T, and, the main heat transfer data of the liquid, which are measured in temperature differences of 1.25 K between the 7),v, and the under... 

In this connection, the individual values of c and / , as well as the heat generation data, a and b, of a liquid depend on the kind of the liquid, but these values do not depend on its shape and size. 

The result of the regression analysis to calculate the heat generation data of TBPB is presented in Table 6 in Section 4.7. 

The heat generation data, a and b, of TBPB were calculated in Subsection... 

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