Design and Simulation of an Absorption Diffusion Solar Refrigeration Unit

Abstract

Abstract:The purpose of this study was the design and the simulation of an absorption diffusion refrigerator using solar as source of energy, for domestic use. The design holds account about the climatic conditions and the unit cost due to technical constraints imposed by the technology of the various components of the installation such as the solar generator, the condenser, the absorber and the evaporator. Mass and energy conservation equations were developed for each component of the cycle and solved numerically. The obtained results showed, that the new designed mono pressure absorption cycle of ammonia was suitable well for the cold production by means of the solar energy and that with a simple plate collector we can reach a power, of the order of 900 watts sufficient for domestic use.

Mathematical model of a vapour absorption refrigeration unit

“…This means that for a condenser temperature of 30ºC the maximum COP can be observed at a low T g (rather than a high one) and at low T a . Such trends have been observed in a similar simulation by Chaouachi et al [8] where as generator temperature was increased the COP decreased for an evaporator temperature of 0ºC and various condenser pressures. The COP limit of around 0.6 has also been observed by Kim et al [9].…”

Modeling of Boiling Two-Phase Flow in the Bubble Pump of Diffusion-Absorption Refrigeration Cycles

“…First, it increases the coefficient of performance of the cycle (COP) using the minimum possible heat and desorbing the maximum possible refrigerant (Zohar et al, 2008). Second, it can be heated using solar thermal energy by integrating the bubble pump tubes and a solar collector (Chaouachi and Gabsi, 2007;Jakob et al, 2008).…”

Solar Radiation at Total Solar Eclipse, 29-March 2006, at Tobruq

“…Continuing on a northeastern course, the umbra crossed central Libya and reached the Mediterranean coast at 10:40 UT. Northwestern Egypt also lied within the umbral path, where the central duration was 3 min 58 sec (Espenak and Anderson, 2004;Chaouachi and Gabsi, 2007).…”