Hydraulic analysis

Thermal-Hydraulic Analysis must be extended to at least 24 hours into the accident. This study used calculations for feed-and-bleed operation with a charging pump, and with gravity teed from the refueling water storage tank (RWST),... 

Chu, K. J., and A. E. Dukler, 1974, Statistical Characteristics of Thin Wavy Films, AIChE J. 20 695. (3) Chu, P. T., H. Chelemer, and L. E. Hochreiter, 1973, THINC IV An Improved Program for Thermal Hydraulic Analysis of Rod Bundle Cores, WCAP-7965, Westinghouse Electric Corporation, Pittsburgh, PA. (App.)... 

Rowe, D. S, 1973, COBRA IIIC A Digital Computer Program for Steady State and Transient Thermal Hydraulic Analysis of Rod Bundle Nuclear Fuel Elements, BNWL-1695, Battelle Northwest Laboratory, Richland, WA. (3)... 

The sizing of piping is based upon a hydraulic analysis for the water distribution network for the WCCE. The main delivery pipe should be sized to provide 150% of the design flow rate. A residual pressure and flow requirement at the most remote hydrocarbon process or storage location from the supply source dictates the sizing for the remaining system. Normal reliability requirements usually suggest that minimum of two sources of supply be available that are in themselves remote from each other. Therefore two remote flow calculations must be performed to determine the minimum pipe distribution size. NFPA 24 requires that the minimum residual pressure available in a fire main not be less than 6.9 bars (100 psi.). Velocity calculations should be performed which verify flows are not more than the limits of the material that is employed. 

Hydraulic analysis and controlling mechanism For the determination of the mass transfer coefficient, and the case of wastewater treatment, the correlation proposed by Chern and Chien (eq. (3.345)) is used. As a criterion, the Biot number as defined by Hand et al. (eq. (4.105)) is used. 

Hydraulic analysis Using Figure 3.27, the appropriate gas superficial velocity and the column diameter for the heterogeneous flow regime can be selected. An appropriate choice for the reactor diameter and the superficial gas velocity is 0.5 m and 0.1 m/s, respectively. The height to diameter ratio in columns is greater than unity and a value of 5 is reasonable. Therefore, the value of 2.5 m has been selected for the column height. As a result, the reactor volume is equal to 0.49 m3. This volume is occupied by the reaction mixture, which is the gas, the liquid, and the solid phase. 

Hydraulic analysis Thus, we suppose a typical design for the agitated tank which means that (Table 3.3)... 

Hydraulic analysis The porosity of the bed at incipient fluidization is evaluated by using the Limal-Ballesteros correlation (eq. 3.467) ... 

Why adsorption, ion exchange and heterogeneous catalysis in one book The basic similarity between these phenomena is that they all are heterogeneous fluid-solid operations. Second, they are all driven by diffusion in the solid phase. Thus, mass transfer and solid-phase diffusion, rate-limiting steps, and other related phenomena are common. Third, the many aspects of the operations design of some reactors are essentially the same or at least similar, for example, the hydraulic analysis and scale-up. Furthermore, they all have important environmental applications, and more specifically they are all applied in gas and/or water treatment. 

Apart from the analysis of kinetics, mass transfer, and equilibrium of the processes at a fundamental level, the analysis of material, and in fixed beds energy balances in the reactors, as well as a number of analytical solutions of the reactors models are presented. Furthermore, the hydraulic behavior of the reactors is presented in detail. Hydraulic analysis is basically... 

This implies that the LMTD or MTD as computed in equations 20 through 26 may not be a representative temperature difference between the two heat-transferring fluids for all tubes. The effective LMTD or MTD would be smaller than the value calculated, and consequently would require additional heat-transfer area. The tme value of the effective MTD may be determined by two- or three-dimensional thermal—hydraulic analysis of the tube bundle. Baffle—Tube Support Plate Area. The portion of a heat-transfer tube that passes through the flow baffle—tube support plates is usually considered inactive from a heat-transfer standpoint. However, this inactive area must be included in the determination of the total length of the heat-transfer tube. 

Hydraulic analysis of the Aspen Plus simulator produces thermodynamic ideal minimum flow and actual flow curves for rigorous distillation column simulations. These types of calculations are performed for RADFRAC columns. Using the input summary given in problem 4.48 construct the stage-flow curves. Assess the thermodynamic performance of the column. 

The thermal-hydraulic analysis and thermal stress analysis of plate-type SO3 decomposer had... 

In our approach a detailed hydraulic analysis is carried out, where the flow and transport properties at the small scale are analysed by means of the fracture network software FracMan, Derschowitz et al. (1998), and MAFIC, Miller et al. (1999), that handle complex fracture geometries and fracture transmissivity distributions. The approach is probabilistic. A large number of network... 

Moreover, coupled thermal and hydraulic analysis in the far field is conducted using the homogenized parameters and the heat flux from the near field. This series of simulations shows that it is necessary to consider the effects of coupled processes in the near field on the regional groundwater flow system. 

In order to reduce the unit energy cost, it is essential to adopt a superheated steam cycle. Operating experience of elevated temperature components in FBR indicates that creep-fatigue damage can be well taken care of in the design. Thermo-hydraulic analysis needs to be detailed to have complete knowledge of thermal loading. 

Subchannel analysis is commonly used for thermal hydraulic analysis of single fuel subassemblies. Bulk average values characterize the fluid dynamics and thermal coolant conditions in each subchannel. Thermal and hydraulic interactions between subchannels are taken into account. 

Plant safety assessment projects improve the abilities of designers, operators, and regulators to evaluate the safety of their plants through the use of internationally accepted methodologies and computer analysis codes. An example of a key accomplishment in this area is training technical personnel to use the COBRA-SFS computer code to perform thermal-hydraulic analysis (shown in Fig. 4). 

Design of main system arrangement, of key components such as a steam reformer and a steam generator and of control method, especially start-up procedure and development of computer code for transient thermal-hydraulics analysis have been conducted. The steam generator is designed to have a safety function as an interface. 

Anonymous (1956). N.L. Barbarossa. Proo. 6 Hydraulics Conference Iowa Frontispiece. P Anonymous (1970). Nicholas Leonard Barbarossa. ICOLD Congress Montreal 6 110. P Barbarossa, N.L. (1959). Hydraulic analysis of surge tanks by digital computer. Journal of the Hydraulics Division A CP 85(HY4) 39-78 86(HY5) 106-112. 

Size the Distillation Column. This includes the hydraulic analysis to establish operating ranges, pressure drop, and mass transfer efficiency. The result is a set of dimensions, including column diameter and height, number of actual trays (or height of packed bed), details of internal devices, and profiles of temperature and pressure. 

Structural mechanics analysis indicates that the acceptable temperature difference between the primary temperatures from IHX outlets is about 40 K. Thermal hydraulics analysis indicates that with one module isolated in one loop, the temperature difference is 10 K at 90 % power. With 2 modules isolated, this temperature difference is 24 K at 67 % power. To achieve this, it is necessary to reduce the core flow (to 67 %) in proportion to the power as well as the sodium flow in the unaffected loop (50 %) as in the affected loop (50 %) The... 

The question is What could cause feed vaporization First, hydraulic analysis was conducted for the exchangers. Comparing pressure drops between the clean condition and the measured pressure data in 1998 indicated a gap of 60 psi in pressure drops. With a gain in pressure by 60 psi in the preheat train, the feed would not vaporize even after the energy modification projects are implemented. 

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