Written in English
|Statement||by Toly Agazim and James G. Shakman|
|Contributions||Shakman, James G.|
|The Physical Object|
|Pagination|| leaves :|
|Number of Pages||66|
Efficiency of heat transmission in a vacuum evaporator. by Toly Agazim,James G Shakman. Share your thoughts Complete your review. Tell readers what you thought by rating and reviewing this book. Rate it * You Rated it *. texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK The efficiency of heat transmission in a vacuum evaporator Item Preview remove-circle The efficiency of heat transmission in a vacuum evaporator by Diemecke, Curt W; Yamamoto, I. Pages: Full text of "Heat transmission in a vacuum evaporator" See other formats of Technaio'^ UNIVERSJ 17 LIBMRIES AT 2 52 Dormitzer, H. C. Heat transmission in a vacuum evaporator FOR USE m umMN oniv 'T-.y\i>;--V A THESIS PEESSHTKD BY ) AID U TO THE PEESILEJJT AMD FACDITY OF TEE AEKCUE IISTITUTE OF TECEHOLOGY FOE TEE DEGHEE . engineering. Heat transfer can be broken down into three processes: conduction, convection and radiation. By utilizing the properties of a vacuum, it is possible to eliminate (or at least greatly reduce in a laboratory setting) the heat transfer by conduction and convection so that one can study the properties of radiant heat Size: 41KB.
The plate evaporator is designed to operate at pressures extending from 10 psig ( barg) to full vacuum when using any number of effects. However, the maximum pressure differential normally experienced between adjacent annuli during single effect operation is 15 psi (1 bar).File Size: KB. the vacuum chamber with a heater. • Seal and evacuate the chamber. • Heat the source. When the temperature reaches the evaporation temperature, atoms or molecules start to leave the surface of the source and travel in a more or less straight path until they reach another surface (substrate, chamber wall, instrumentation). •File Size: 1MB. In an evaporator handling an aqueous salt solution, the overall coefﬁcient U(kW/m2 deg K) is given by a form of equation as: 1/U2 = 7 ×10−5t b+, the heat transfer area is 40 m2, the temperature driving force is 40 deg K and the latent heat of vaporisation of water is kJ/kg. If the down-time for cleaning is 15 ks ( h), the File Size: KB. Sometimes both may be accomplished. Evaporator design consists of three principal elements: heat transfer, vapor-liquid separation, and efficient utilization of energy. In our sugar industry the solvent is juice, heat is supplied by condensing steam, and the heat is transferred by indirect heat transfer across metallic surfaces.
Evaporation efficiency. A two-effect falling-film evaporator with thermocompressor requires about kg of steam to evaporate 1 kg of water, and a five-effect evaporator requires kg of steam. Without the thermocompressor, the specific steam consumption would be approx. and kg per kg of water evaporation respectively. improving the performance and energy efficiency of the evaporator plant as it is among the biggest consumers of - Vacuum reading at the inlet of the vacuum system should be approximately 26 to 27 in. Hg. Any lower this sensible heat in an efficient manner. However, in time, the internal liquor boxes will start leaking or even File Size: 41KB. It is used in calculating the heat transfer, typically by convection or phase transition between a fluid and a solid. The heat transfer coefficient has SI units in watts per squared meter kelvin: W/(m 2 K). Heat transfer coefficient is the inverse of thermal insulance. This is used for building materials (R-value) and for clothing insulation. In a second step, the fouling, which reduce the heat-transfer efficiency in heat exchangers, is also considered as a function of time and control decisions, in order to optimally drive the process considering the long-term effect. This fouling behaviour forces periodic stops for cleaning, which will be also object of Cited by: