Resultant temperature

Nonvolatile Solvents. In practice, some gases tend to Hberate such large amounts of heat when they are absorbed into a solvent that the operation caimot be assumed to be isothermal, as has been done thus far. The resulting temperature variations over the tower will displace the equiUbrium line on 2tj—x diagram considerably because the solubiUty usually depends strongly on temperature. Thus nonisothermal operation affects column performance drastically. 

Differential-Temperature Thermal Flow Meters. Meters of this type inject heat into the fluid and measure the resulting temperature rise or, alternatively, the amount of power required to maintain a constant temperature differential. The power required to raise the temperature of a flowing stream by an amount AT is given by the relation ... 

Model foim. On the basis of the nature of the data, an exponential model was selected initially to represent the trend if = a + he. In this example, the resultant temperature would approach as an asymptotic (a with c negative) the wet-hnlh temperature of the surrounding atmosphere. Unfortunately, this temperature was not reported. 

For best results temperature should he maintained hetween 322 and 327 K (130 and 140°F) for the first few days and hetween 327 and 333 K (130 and 140°F) for the remainder of the active composting period. If temperature goes beyond 339 K (150°F), biological activity is reduced significantly... 

Flame Temperature The heat released by the chemical reaction of fuel and oxidant heats the POC. Heat is transferred from the POC, primarily by radiation and convection, to the surroundings, and the resulting temperature in the reaction zone is the flame temperature. If there is no heat transfer to the surroundings, the flame temperature equals the theoretical, or adiabatic, flame temperature. 

Let a volume (dv) of mobile phase pass through the cell, carrying solute that is absorbed onto the surface of the adsorbent with the evolution of heat, and let the resulting temperature change be (d6). 

If the reaction is conducted both adiabatically and witli stoichiometric air. tlie resulting temperature is defined as tlie theoretical adiabatic flame temperature (TAFT). It represents tlie nia.xinuuii temperature tliat tlie products of combustion (flue) can acliieve if the reaction is conducted both stoichionietrically and adiabatically. For tliis condition, all tlie energy liberated from combustion at or near standard conditions (AH°c and/or AH°29s) appears as sensible heat in raising tlie temperature of tlie flue products, AHp, tliat is ... 

AH° = —65.17 kj. If all this heat could be transferred to 250. g of water, what would be the resulting temperature change of the water ... 

Under steady-state conditions, 3 = O the resulting temperature profile along the tube is given by... 

For turbulent flow in single-phase systems, the predicted temperature profile is not changed significantly if the Peclet number is assumed to be infinite. Therefore, in turbulent two-phase systems the second-order terms in Eqs. (9) probably do not have a significant effect on the resulting temperature profiles. In view of the uncertainties in the present state of the art for determining the holdups and the heat-transfer coefficients, the inclusion of these second-order terms is probably not justified, and the resulting first-order equations should adequately model the process. 

The flow rate of a hot coal/oil slurry in a pipeline is measured by injecting a small side stream of cool oil and measuring the resulting temperature change downstream in the pipeline. The slurry is initially at 300°F and has a density of 1.2 g/cm3 and a specific heat of 0.7 Btu/(lbm °F). With no side stream injected, the temperature downstream of the mixing point is 298°F. With a side stream at 60°F and a flow rate of 1 lbm/s, the temperature at this point is 295°F. The side stream has a density of 0.8 g/cm3 and a cp of 0.6 Btu/(lbm °F). What is the mass flow rate of the slurry ... 

On the other hand, samples can be irradiated at constant microwave power over a certain fixed period, for example at 100 W for 10 min. As there is no control over the resulting temperature or pressure, care has to be taken not to exceed the operational limits of the system and this type of program should only be used for well-known reactions with non-critical limits, or under open-vessel (reflux) conditions. Since in this method only the applied energy and not the resulting temperature is controlled, the quality of reaction control is often superior employing a temperature-controlled program. 

Some software packages additionally offer pressure-controlled method development, which relies on the resulting pressure as a limiting factor. The microwave power is regulated by the adjusted pressure limit, and thus there is no influence on the resulting temperature. Because the reaction temperature is the most crucial parameter for successful chemical synthesis, this program variation is used only rarely. For preliminary experiments, it is recommended that temperature programs... 

Let us take advantage of the inequality fih QK I permitting neglect of the terms of the order exp(-/M2K). Then the trace taken over high-frequency and low-frequency modes, Sp. .., is reduced to that for low-frequency modes, with all high-frequency vibrations considered only for the ground state. The resulting temperature GF (A3.6) takes the form ... 

It is further found that the adiabatic flame temperature is approximately 1300 °C for mixtures involving inert diluents at the lower flammable limit concentration. The accuracy of this approximation is illustrated in Figure 4.19 for propane in air. This approximate relationship allows us to estimate the lower limit under a variety of conditions. Consider the resultant temperature due to combustion of a given mixture. The adiabatic flame temperature (7f ad), given by Equation (2.22) for a mixture of fuel (Xp), oxygen (Xo2) and inert diluent (Xd) originally at 7U, where all of the fuel is consumed, is... 

There is a potential thermal runaway upon the combined occurrence of two or more of the above listed factors. For example, an accumulation of reactants in combination with insufficient heat removal leads to a runaway of the desired reaction. The resulting temperature increase (now uncontrolled) may lead to an explosive decomposition if other exothermic reactions, such as decompositions or polymerizations, occur within the range of the temperature increase. 

Quenching of the drained fluids was calculated as a function of the initial fluid temperature, and of the ratio between fluid and cold sulfuric acid. As a result of an automatic drain at 30°C above normal, the resulting temperature was found to be 90°C. 

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