Abstract—Adsorption refrigeration workin the main component in the adsorption r Therefore the development key is laying on th leads to the improvement of the adsorption ref this study the state-of-the-art in the applicat refrigeration working pairs in both classical a pairs are presented, compared and summarize maximum adsorption capacity for the classic 0.259kg/kg for activated carbon/methanol an working pairs was 2kg/kg for maxsorb I concluded that, the performances of the adsor adsorption cooling systems are still need fu well as developing adsorption pairs having hi with low or no impact on environmental, to bu reliable and long life performance adsorption researches need to be focused on designing the provide efficient heating and cooling for th through distributing the adsorbent material surface, to allow good heat and mass transfer and the refrigerant. Keywords—Adsorption, Adsorbent/ Refrigeration. I. INTRODUCTION HE increase in people's living stan increase in needing of comfortable an working environment, this leads to an inc for Heating, Ventilation and Air-Con systems. Therefore for the target of clea efficient use of energy, research and deve of air conditioning need to have more dev conditioning and refrigeration systems renewable resources such as solar energ may leads to a decrease in the electri especially in peak periods. Also, the conventional air conditioning and refriger environment, as they use the traditional ref a significant increase the global wo accelerating depletion of the ozone laye alternative solutions to the develop re conditioning systems to be efficient in e environmental impacts such as adsorption The concept of adsorption refrigerati evaporation and condensation of a refrige Ahmed N. Shmroukh is a PhD student (ahmed. Ahmed Hamza H. Ali is a professor (ahmed. Refrigeration and Air Conditioning and chairperso Energy Resources Engineering and Ali K. Abel-Ra authors affiliated to Egypt- Japan University of Sci JUST, New Borg Elarab, Alexandria 21934, Egypt. Ahmed N. Sh Adsorption R State-of T ng pair is a vital and is refrigeration machine. he adsorption pair that frigeration machine. In tion of the adsorption and modern adsorption ed. It is found that the cal working pairs was nd that for the modern III/R-134a. The study rption working pairs of urther investigations as igher sorption capacity uild compact, efficient, n chillier. Also, future e adsorption system that he adsorbent materials over heat exchanger between the adsorbent /Adsorbate Pairs, ndards, leads to an nd suitable homes or crease in the demand nditioning (HVAC) an environment and elopment in the field velopment for the air to be driven from gy. In such case this ical energy demand adverse effect of ration systems on the frigerants, which has orming as well as er. Thus one of the efrigeration and air energy use and less based systems. ion is based on the erant combined with .shmroukh@ejust.edu.eg), .hamza@ejust.edu.eg) of on of the Department of ahman is a professor. All ience and Technology E- adsorption or chemical rea systems (ARS) uses solid ads a refrigerant to obtain cooli refrigeration system usually c a solid adsorbent bed or adso device and an evaporator [1]. in Fig. 1. The system ope reversible adsorption betw refrigerant, this reversibilit temperature and the vapor obtain a continuous and s generally two or more adsorb cycle (two-bed adsorption) desorption period and the oth adsorption period, then the co time”. The heating and coolin adsorbers reach the desired up of the refrigeration cycle, whi refrigerant fluid and the adso interest in development of ad for different reasons. Among quiet, long lasting, cheap to benign [3]. The adsorption c have the advantages of being parts, efficiently driven by renewable energy sources, a lubricants [4]. Fig. 1 Schematic diagram of th The adsorption refrigeratio the main component in the a Therefore the development ke that leads to the improvemen machine. A wide variety hmroukh, Ahmed Hamza H. Ali, Ali K. Abel-Rah Refrigeration Working P f-the-Art in the Applica action. Adsorption refrigeration sorbent beds to adsorb and desorb ing effect. The basic adsorption consists of four main components: orber, a condenser, an expansion . Schematic of the cycle is shown erates on the principle of the ween the adsorbent and the ty depends on the adsorbent pressure of the refrigerant. To stable cooling effect in ARS, bers are used. In the two-adsorber ), one is heated during the her adsorber is cooled during the omplete cycle is known as “cycle ng periods are reversed when the pper and lower temperature limits ich depend on the selection of the orbent [2]. Recently there is more dsorption refrigeration technology of them, the sorption systems are o maintain and environmentally cooling and refrigeration systems g, free or nearly free of moving low-temperature waste heat or and do not require any synthetic he adsorption refrigeration cycle [2] on working pair is a vital and is adsorption refrigeration machine. ey is laying on the adsorption pair nt of the adsorption refrigeration of working pairs are possible hman Pairs: The ation World Academy of Science, Engineering and Technology International Journal of Chemical and Molecular Engineering Vol:7, No:11, 2013 793 International Scholarly and Scientific Research & Innovation 7(11) 2013 scholar.waset.org/1307-6892/17246 International Science Index, Chemical and Molecular Engineering Vol:7, No:11, 2013 waset.org/Publication/17246