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Block schematics of fractionating towers at primary-distillation refineries are examined. Causes of unsatisfactory tower performance are analyzed. A program is developed for modernization of internal contact devices in the towers. It is proposed to use regular packings in lieu of vacuum-tower...
It is shown that the indicated efficiency gives an exaggerated assessment of thermodynamic perfection of the working process of piston compressors and leads to a biased estimate of mechanical losses. It is established that an alternative to the indicated efficiency is internal efficiency of the...
Performance of solar refrigerating units using ammonia, methylamine, ethylamine, dimethylamine, methanol, and ethanol as refrigerants (adsorbates) and activated carbon as adsorbents has been studied. A mathematical model has been built to determine the level of thermodynamic perfection based on...
A description is given of a powder pigment recovery system used at a factory for making protective coatings. The system provides higher throughput by the use of two series-connected ITsN cyclones and an additional fine-finishing filter. Tests have given the overall performance in dust trapping...
Models of operation of regular, hydrostatic, and hydrodynamic end seals are examined. A procedure is proposed for calculating heat generation in the end slot of a seal. In comparison with experimental data, the error in the calculation is not higher than 10%.
The paper discusses the connection between limiting strength state and safety. The standard condition for strength is examined and a possible approach is presented for transferring from the rigid standard limiting state to a soft one as regards safety in a probabilistic formulation.
A procedure is proposed for power analysis of the cutting of worn pneumatic-tire casings into fragments. An example is cited for analysis of the thrust force and process power required for transverse and longitudinal cuts in the carcass-breaker-tread bands of pneumatic tires.
To analyze the trends of hydrogen engine building, gaseous and liquid hydrogen storage systems are compared. The advantages and prospects of running Stirling engines on hydrogen are noted. The concept of building infrastructure of KrioAZS cryogenic fuel filling complexes for motor vehicles is...
The paper discusses applying the mechanics of small cracks to test results on smooth specimens for use in sign-varying bending. Approximate formulas are derived for the shape of the nucleating crack in bending and the rate of growth. A hypothesis is formulated and verified on the equality of the...
A formula for calculating the mass-transfer coefficient during the effervescent discharge of chlorine, which can be used for the design of bubbling reactors and absorbers, is derived on the basis of experimental data relative to the mass-transfer rate in a dichloroethane-chlorine system.
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