Tank Coils

The thermal design of tank coils involves the determination of the area of heat-transfer surface required to maintain the contents of the tank at a constant temperature or to raise or lower the temperature of the contents by a specified magnitude over a fixed time. 

Methods for calculating heat loss from tanks and the sizing of tank coils have been published by Stuhlbarg [Pet. Refiner, 38, 143 (April... 

There is almost no degree of freedom in the choice of the crystallizer type Crystallization in fine chemicals manufacture is usually carried out in jacketed stirred tanks. Coils can also be used to enhance cooling, but crystals are often formed on their surface. This encrustation results in a large increase of the thermal resistance, and, consequently, a decrease of the cooling capability of the tank. Any roughness of inner surfaces of the tank can be a germ for crystals, particularly the cooled surfaces. Therefore, crystallizers are often made with polished cooled surfaces. 

Stirred tank, coil inside liquid-condensing steam 120-440... 

The vapours which escape the tower are condensed in condenser 19. First, we distil the distillate which boils out at a temperature below 70 °C and contains low-boiling by-products. It is collected and used later to flash the tower tank. Then we distil dibutil ether, which is collected and sent to dry. The product remaining in the tank, which mostly consists of tris(y-trifluoropropyl)silane, is cooled, filtered of tarry matter and poured into collector 23. The product collected there after several operations is sent by nitrogen flow (0.07 MPa) into rectification tower tank 24, where tris(y-trifluoropropyl)silane is distilled from tank residues. The jacket of tank is filled with ditolylmethane or l,3-bis(triphenoxysiloxy)benzene, and the tank coil is filled with vapour. 

Some compounds, however, display no resonance at this temperature, e. g. ICN 10) and piperazine 12) in the former compound, strains may explain the absence of the lines observed at higher temperatures. Operation at liquid nitrogen temperature is convenient because it enhances the Boltzmann factor and the tank coil quality factor. On the other hand, long relaxation times may reduce line intensities below observability, so that it may be better to operate at a slightly higher temperature where relaxation times are shorter while the Boltzmann factor and the coil quality are not much decreased13). 

Tank Coils Pipe tank coils are made in a wide variety of configurations, depending upon the application and shape of the vessel. Helical and spiral coils are most commonly shop-fabricated, while the hairpin pattern is generally field-fabricated. The helical coils are used principally in process tanks and pressure vessels when large areas... 

The a.c. radiofrequency power (1.2 meg. cycle/sec.) to the A- and B-type reactors was supplied by a modified C-12 Radyne plasma generator of IKW rated output. The modification consisted of placing a secondary winding within the tank coil of the generator. The power output was tapped off from this winding. Measurement of the power dissipated in the discharge was achieved by determining the power factor... 

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