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Transcript of Tablas Intercambiadores Ntu
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8/9/2019 Tablas Intercambiadores Ntu
1/8
Copyright: Glasgow College of Nautical Studies Page 1 of 8
Effectiveness/NTU Curves for Tubular Heat Exchangers
Definitions
)(
)()(
)()(
)/()(
))/(/()(
)(
)(
)//()(
))/(/()(
)//()(
2
2
fluidscoldandhotofestemperaturentrybetweendifference
ratecapacitylowerwithfluidofchangeetemperaturesseffectiven
Cm
AUunitstransferofnumberNTU
mtransferheatforareasurfaceA
KmWtcoefficientransferheatoverallU
ratecapacityheathigher
ratecapacityheatlowerR
KWratecapacityheatCm
KkgJcapacityheatspecificC
skgrateflowmassm
lower
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==
=
=
=
=
=
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Glasgow College of Nautical Studies offers distance learning courses for the Engineering Council Graduate DiplomaExamination.
Glasgow College of Nautical Studies, 21 Thistle Street, Glasgow G5 9XB, UKTel: 0141 565 2500 Fax: 0141 565 2599
www.gcns.ac.uk [email protected]
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Copyright: Glasgow College of Nautical Studies Page 2 of 8
Effectiveness/NTU Curves: parallel flow
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Copyright: Glasgow College of Nautical Studies Page 3 of 8
Effectiveness/NTU Curves: counter flow
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Copyright: Glasgow College of Nautical Studies Page 4 of 8
Effectiveness/NTU Curves:
one she ll pass and an even number of tube passes
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fectiveness
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Copyright: Glasgow College of Nautical Studies Page 5 of 8
Effectiveness/NTU Curves:
two shell passes and twice an even number of tube passes
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fectiveness
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Copyright: Glasgow College of Nautical Studies Page 6 of 8
Effectiveness/NTU Curves:
cross flow - both fluids unm ixed
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Copyright: Glasgow College of Nautical Studies Page 7 of 8
Effectiveness/NTU Curves:
crossflow - lower capacity fluid mixed
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Copyright: Glasgow College of Nautical Studies Page 8 of 8
Effectiveness/NTU Curves:
crossflow - higher capacity fluid mixed
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NTU
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ctiveness
