Study of a two-phase secondary refrigerant 2: Experimental analysis of thermal and rheological behaviour

The first part of this article deals with the determination of intrinsic th ermophysical properties of an ice slurry composed of an aqueous solution of ethanol with ice in suspension. In this second part, we present experiment al studies of thermal and rheological behaviour of this ice slurry. In a fi rst time, heat transfer in a brushing surface heat exchanger were investiga ted To evaluate the heat transfer coefficient between the ice slurry and th e wall surface, a suitable correlation is developed The influence of ice su spension on the pressure losses for ice slurry flowing in straight lengths of tubes and in singularities was studied. Finally, the measurements of tem peratures in a storage tank show a strong stratification with another distr ibution of concentration in ice and alcohol. (C) 1999 Elsevier Science Ltd and IIR. All rights reserved.