C O N T E N T S

coefficient of performance
WAVY FINS PITCH INFLUENCE ON WATER-AIR HEAT
EXCHANGER PERFORMANCE
by
MIHAI NAGI, IOAN-DANIEL CĂRĂBAŞ and PAUL ILIEŞ
Abstract. In this paper there is experimental research developed, on
how does the pitch of sinuous fin, on the air side, influence the thermic
transfer coefficient and pressure drop. The results have been generalized
and the Colburn curves have been plotted according to Reynolds, and the
friction coefficient according to Reynolds.
Key words: fin pitch, heat changers, thermic transfer, Colburn,
Reynolds.
EXERGY ANALYSIS OF THE TRANSIENT REGIME OF
VAPOUR COMPRESSION REFRIGERATION SYSTEMS
by
RAHAL BOUSSEHAIN, ELENA EUGENIA VASILESCU, YOUCEF
ABDELLOUCHE, MICHEL FEIDT and ALEXANDRU
DOBROVICESCU
Abstract. This paper presents a method of analysis of the exergy
destruction on each component of a vapor compression refrigeration
system during the transient regimes of functioning. Using experimental
data, one calculated the exergy destruction as a function of time under
the influence of some factors that perturb the stationary regime, as the
deactivation of a piston, the variation of the mass flow rate and of the
initial temperature of the cooled fluid, the diminution of the compressor
speed.
Key words: exergy destruction, refrigeration, transient regime.
SIMULATION OF A DOMESTIC ABSORPTION OF CHILLER
by
NADÈGE CHATAGNON, MARC BACHMANN,
GUILLAUME ANIES and JEAN CASTAING-LASVIGNOTTES