The CHF enhancement combining nano-fluid and honeycomb porous plate in a saturated pool boiling
Several studies have proposed the use of nanofluids to enhance the in-vessel retention (IVR) capability in the severe accident management strategy implemented at certain lightwater reactors. Systems using nanofluids for IVR must be applicable to large-scale systems, i.e., infinite heated surface...
| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
American Society of Mechanical Engineers (ASME)
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/65473/ http://irep.iium.edu.my/65473/ http://irep.iium.edu.my/65473/ http://irep.iium.edu.my/65473/7/65473%20CHF%20ENHANCEMENT.pdf |
| Summary: | Several studies have proposed the use of nanofluids to
enhance the in-vessel retention (IVR) capability in the severe
accident management strategy implemented at certain lightwater
reactors. Systems using nanofluids for IVR must be
applicable to large-scale systems, i.e., infinite heated surfaces.
However, the effect of the size of heater with nanoparticle
deposition was revealed that the CHF is decreased with the
increased heater size. On the other hand, the CHF using a
honeycomb porous plate was shown experimentally to be more
than twice that of a plain surface with a heated surface diameter
of 30 mm, which is comparatively large compared to 10 mm.
This enhancement is resulted from the capillary supply of liquid
onto the heated surface and the release of vapor generated
through the channels.
In the present paper, in order to enhance the CHF of a large
heated surface, the effects of a honeycomb porous plate and a
nanofluid on the CHF were investigated experimentally. As a
result, the CHF was enhanced greatly by the attachment of a
honeycomb porous plate to the modified heated surface by
nanoparticle deposition, even in the case of a large heated
surface |
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