C O N T E N T S

Abstract. Liquid absorption tri-thermal refrigeration systems are
particularly promising in solar cooling. Designed and sized in order to
reply to nominal conditions, these machines are often submitted to
varying operating conditions. Being able to predict their influences on
the machine and the associated energy performance is revealing rather
tricky. After a brief review of the operating principle, we present the
experimental results obtained on a test bench where were applied various
experimental conditions on a ROTARTICA Solar of 4.5 kW. In a second
step, a model is developed to predict the chiller’s performance based on
operating temperatures. To do this, the main parameters of the model
have been identified thanks to three different tests and validated on other
experimental results. The simulation’s results are in agreement with the
measures. Finally the sensibility of the parameters identified is studied
and discussed.
Key words: modeling, identification, simulation, absorption.
MODELISATION D’UN SYSTÈME DE RAFRAICHISSEMENT
SOLAIRE PAR ABSORPTION UTILISANT (H 2 O – LIBR)
by
R. TOUAIBI, M. TAHAR ABBES, R. BOUSSEHAIN,
M. FEIDT, E. VASILESCU, M. COSTEA et B. KHELIDJ
Abstract. Absorption solar cooling is a very modern technology to
cool a room by using a binary solution and a source of free heat using a
solar collector. This paper will be devoted to the study of a system
designed to cool via solar absorption using the mixture of lithium
bromide-water (LiBr/H 2 O) with water as the refrigerant. The principle of
operation is first introduced, and then the system modeling is presented.
Modeling is an essential step in evaluating the potential of this technique.
Models of the system components will be developed to perform the
complete modeling of the system equipped with two types of solar
collectors in order to improve its performance. The model can be used to
provide a prototype for application in Algeria.
Key words: cooling, absorption, solar, modeling, lithium bromide.
ON PRESSURIZATION OF A COMPARTMENT DUE TO
RUPTURE OF COOLANT PIPING IN A NUCLEAR POWER