By Manfred Nitsche, Raji Olayiwola Gbadamosi
Heat Exchanger layout consultant: a pragmatic consultant for making plans, opting for and Designing of Shell and Tube Exchangers takes clients on a step by step advisor to the layout of warmth exchangers in day-by-day perform, displaying how you can be sure the powerful using temperature distinction for warmth move.
Users will the way to calculate warmth move coefficients for convective warmth move, condensing, and evaporating utilizing basic equations. Dew and bubble issues and contours are lined, with all calculations supported with examples.
This functional advisor is designed to assist engineers clear up usual difficulties they could stumble upon of their day by day paintings, and also will function an invaluable reference for college students studying in regards to the box. The ebook is commonly illustrated with figures in aid of the textual content and contains calculation examples to make sure clients are totally outfitted to pick, layout, and function warmth exchangers.
- Covers layout procedure and sensible correlations had to layout useful warmth exchangers for procedure application
- Includes geometrical calculations for the tube and shell part, additionally overlaying boiling and condensation warmth transfer
- Explores warmth move coefficients and temperature differences
- Designed to assist engineers clear up ordinary difficulties they could come across of their daily paintings, but in addition excellent as an invaluable reference for college students studying concerning the field
Read or Download Heat Exchanger Design Guide: A Practical Guide for Planning, Selecting and Designing of Shell and Tube Exchangers PDF
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Warmth Exchanger layout advisor: a pragmatic advisor for making plans, picking and Designing of Shell and Tube Exchangers takes clients on a step by step advisor to the layout of warmth exchangers in day-by-day perform, displaying the way to confirm the potent using temperature distinction for warmth move. clients will the way to calculate warmth move coefficients for convective warmth move, condensing, and evaporating utilizing basic equations.
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Extra resources for Heat Exchanger Design Guide: A Practical Guide for Planning, Selecting and Designing of Shell and Tube Exchangers
Determination of the ﬂow velocity wT in the tubes À Á V m3 h 51 ¼ 1 m=s ¼ wT ¼ 0:0142 Â 3600 aT Â 3600 3. Determination of the Reynolds number Re ¼ wT Â d i 1 Â 0:021 ¼ 22826 ¼ 0:92 Â 10À6 n 4. Calculation of the Pr number Pr ¼ n Â c Â r Â 3600 0:92 Â 10À6 Â 1:16 Â 995 Â 3600 ¼ ¼ 6:32 l 0:605 5. Determination of the Nusselt number Nu ¼ 0:023 Â Re0:8 Â Pr0:33 ¼ 0:023 Â 228260:8 Â 6:320:33 ¼ 129:62 6. 108 W/m K 1. First, the ﬂow cross section across for the cross stream with the pitch T is determined do 38 ¼ 0:0528 m2 across ¼ Di Â B Â 1 À ¼ 1:1 Â 0:2 Â 1 À 50 T Alternative calculation with the number of tubes nacr in the cross stream nacr ¼ Di 1100 ¼ 22 ¼ 50 T across ¼ B Â ðDi À nacr Â do Þ ¼ 0:2 Â ð1:1 À 22 Â 0:038Þ ¼ 0:0528 m2 2.
10 it is shown for a DN 500 heat exchanger that stream B, that is, the ﬂow part ﬂowing across the tube bundle increases with increasing bafﬂe spacing. Less bafﬂes result in the occurring of less leakage and bypass streams but less bafﬂes with wider bafﬂe spacings decrease the ﬂow velocity and deteriorate the heat transfer. These curves are valid for the following heat exchanger data: Shell diameter DN 500 with 256 tubes 20 Â 2, 6 m long, triangular pitch 26 mm, four passes. Shell-side product: 15 m3/h kerosine, which is cooled with water from 114 to 40 C.
Hence the driving temperature gradient is reduced. The LMTD becomes smaller with increasing leakage. 6 Logarithmic mean temperature difference (LMTD) as a function of the bypass leakage. 6 shows that the increasing number n of change in reversing the ﬂow direction the temperature efﬁciency becomes better. This is because with each shell-side pass, both streams mix. 2 Â shell diameter or maximum 2 C temperature change per shell pass. 7 shows the deﬁciency in the mean temperature difference with increasing leakage.
Heat Exchanger Design Guide: A Practical Guide for Planning, Selecting and Designing of Shell and Tube Exchangers by Manfred Nitsche, Raji Olayiwola Gbadamosi