Abstract
The aim of this paperwork is to provide a performance comparative study of an adsorption refrigeration system powered by solar heat storage based on Moroccan irradiation. The system operates with ammonia as refrigerant and activated carbon as adsorbent. A parabolic through collector is used to collect the solar energy and store it in a heat storage tank. A dynamic simulation program interpreting the real behavior of the system has been developed. The pressure, temperature and adsorbed mass profiles in the Adsorber have been revealed. The system performance is estimated in terms of the specific cooling power (SCP) and the solar coefficient of performance (SCOP). The solar irradiation and the real ambient temperature variations corresponding to the six climatic zones in Morocco are considered. The effect of those conditions on the performance of the system has been investigated. The results show the capability of our system to realize more than one cycle and produce cold during the day. For an optimal configuration of the system and operating conditions of evaporation temperature, Tev=0 °C, condensation temperature, Tcon=30 °C and generation temperature, T3=100 °C, the process could achieve a SCP of 151 W.kg-1and its solar COP could attain 0.148. The system performances improve especially in sunny area.
Highlights
A variety of cooling technologies is available in market
This study proposes a performance comparative analyze of a solar adsorption refrigerator based on heat storage that is collected by a parabolic through collector and where the pair adsorbent/adsorbate is activated carbon/ammonia
5.1 Solar heat storage: For a configuration of the mass flow rate in the sensor piping equal to 0.01 kg.s-1and 0.015 m3 as volume of the heat storage tank (HST)
Summary
A variety of cooling technologies is available in market. Many of these technologies are not ecological friendly. Most of the refrigerants (CFC, HFC, HCFC...) used in these conventional technologies is not healthy for the environment and without high performance to reduce CO2 emissions contributing to the greenhouse effect[1][2] Another concern regarding this technology is the availability of electricity especially in rural areas. This study proposes a performance comparative analyze of a solar adsorption refrigerator based on heat storage that is collected by a parabolic through collector and where the pair adsorbent/adsorbate is activated carbon/ammonia. In this paperwork, the model identifies the influence of the six climatic zones in Morocco on the performance of the system
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