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[23744] Artykuł:

Boiling heat transfer enhancement in subsurface horizontal and vertical tunnels

Czasopismo: Experimental Thermal and Fluid Science   Tom: 32, Zeszyt: 8, Strony: 1564-1577
ISSN:  0894-1777
Wydawca:  ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
Opublikowano: Wrzesień 2008
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału		 Liczba
punktów
Robert Pastuszko orcid logoWMiBMKatedra Mechaniki**10020.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 20
Klasyfikacja Web of Science: Article

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Keywords:

Pool boiling  Subsurface structure  Enhanced surface 


Abstract:

Complex experimental investigations of boiling heat transfer on structured surfaces covered with perforated foil were taken up. Experimental data were discussed for two kinds of enhanced surfaces formed by joined horizontal and vertical tunnels: tunnel structures (TS) and narrow tunnel structures (NTS). The experiments were carried out with water, ethanol and R-123 at atmospheric pressure. The TS and NTS surfaces were manufactured out of perforated copper foil of 0.05mm thickness (hole diameters: 0.3, 0.4, 0.5mm) sintered with the mini-fins, formed on the vertical side of the 5mm high rectangular fins and horizontal inter-fin surface. The effects of hole (pore) diameters, tunnel pitch for TS and tunnel width for NTS on nucleate pool boiling were examined. Substantial enhancement of heat transfer coefficient was observed. The investigated surfaces showed boiling heat transfer coefficients similar to those of existing structures with subsurface tunnels, but at higher heat fluxes range.


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