hrti-design-manual

本文档详细介绍了沸腾和蒸发换热的相关知识,包括不同工质在不同条件下的沸腾曲线、压力影响、混合物沸点范围对再沸器性能的影响等。此外,还探讨了单管和管束沸腾曲线的对比、最大热流密度与临界温差的关系,并涵盖了核状沸腾、膜状沸腾等多个主题。同时,文档涵盖了两相流的基本关系、流动模式、流动限制、压降计算和热传递等方面的内容,对热交换器类型、构造和操作原理进行了深入讲解。

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figures
figure b5.1-1 pool boiling curve for water at atmospheric pressure
figure b5.1-2 effect of pressure on pool boiling for n-pentane on a flat plate
figure b5.1-3 effect of mixture boiling range on kettle reboiler performance
figure b5.1-4 typical comparison of boiling curves for a single tube and a tube bundle, n-pentane at 115 psia(793 kpa)
figure b5.1-5 effect of pressure on maximum heat flux and critical temperature difference, based on cichelli-bonilla data for a flat plate
figure b5.2-1 maximum heat flux, boiling on single tubes
figure b5.2-2 nucleate boiling heat transfer coefficient, at reduced pressure = 0.029, Fp = 1.0(about atmospheric pressure for hydrocarbons)
figure b5.2-3 nucleate boiling pressure correction
figure b5.2-4 boiling range mixture correction, equation for multiple components
figure b5.2-5 estimated minimum nucleate boiling heat flux, q1
figure b5.2-6 heat transfer coefficients as function of composition, C5-C14 mixture
figure b5.2-7 finned tube surface factor, pure hydrocarbons estimation for 483 and 762 fins/m(19 to 30 fins/in)
figure b5.2-8 heat flux based on total outside tube surface, q
figure b5.3-1 conceptual map, performance limitation types for vertical thermosiphon reboilers
figure b5.3-2 pressure factor for maximum heat flux correction in equation(b5.3-1)
figure b5.3-3 choke flow reference maximum heat flux for vertical thermosiphon reboiling inside tubes
figure b5.3-4 tube geometry correction to maximum heat flux
figure b5.3-5 vapor film boiling criteria for single components and mixtures boiling inside tubes
figure b5.3-6 downflow boiling correction
figure b5.6-1 minimum temperature difference for film boiling, equation(b5.6-3)
figure b5.7-1 falling film evaporator
figure b5.7-2 falling film evaporator as distillation column reboiler
figure b5.7-3 tubeside liquid distributors
figure b5.7-4 falling film heat transfer coefficient, zero shear
figure b5.7-5 holmes curves for flooding velocity(requires specific units)

tables
table b5.3-1 types of limitations

section b6
two-phase flow

b6.1 basic relationships
b6.1.1 homogeneous flow model
b6.1.2 separated flow model
nomenclature
references

b6.2 flow regimes
b6.2.1 horizontal flow
b6.2.1.1 tube side
b6.2.1.2 shell side
b6.2.2 vertical flow
b6.2.2.1 upflow boiling
b6.2.2.2 downflow condensation
b6.2.2.3 upflow condensation
nomenclature
references

b6.3 flow limitations
b6.3.1 flooding
b6.3.2 entrainment
b6.3.2.1 design equation for

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