IJSRD - International Journal for Scientific Research & Development| Vol. 3, Issue 05, 2015 | ISSN (online): 2321-0613 All rights reserved by www.ijsrd.com 350 Technology Development and Comparative Study of Adsorption Refrigeration Cycles Parash Goyal 1 Prashant Baredar 2 Arvind Mittal 3 1,2,3 Department of Energy Centre 1,2,3 Maulana Azad National Institute of Technology, Bhopal, India Abstract— Energy is considered the continuous driving power for economic growth and the major requirement for technological developments. The increasing rate of population, industry, and the per capita energy consumption are the major forces that cause the increase in energy demand during the coming years. However, the conventional energy types are neither reliable nor sustainable and the world’s reserves of oil are not large enough to be dependable in the near future. As a consequence, securing sustainable and renewable resources of energy with reasonable costs and without adverse impacts on our environment are the challenge. One solution to this is the application of the adsorption refrigeration systems that are driven by either solar energy or by waste heat. In the present study we have discussed the technological development of various adsorption refrigeration cycles. Moreover, we have provided a comparative study of some important adsorption refrigeration cycles. Key words: Adsorption Refrigeration Cycle, Hybrid System, Solar Refrigeration, Hybrid Systems I. INTRODUCTION Currently 80% on the energy on Earth emanates from fossil fuel resources [1]. It is estimated that this global energy consumption increases by 71% among 2003 and 2030 [2]. This rising energy consumption world- wide makes it urgent to find new solutions to use the energy resources in the more efficient in addition to rational way. In addition, The International Initiate of Refrigeration in Paris (IIF/ IIR) has estimated that approximately 15% of all the so-called electricity produced in depends upon is employed regarding refrigeration and air-conditioning processes of assorted kinds, and the force consumption for air-conditioning systems has been estimated to 45% on the whole households in addition to commercial buildings. The more common vapour compression refrigeration cycles are driven simply by electricity or temperature, which strongly increases the consumption of electricity and fossil vitality. Moreover, peak electricity demand during summer has re-enforced by the actual propagation of air- treatment appliances. So utilization of electricity is a big problem for vapour compression refrigeration program. In developing international locations, a large proportion of individuals live in rural areas where grid electricity is seldom available at present and is likely to be the case for your next few years. Therefore conventional, electrically powered watery vapor compression refrigeration systems might not be of much use for them. Moreover, these regular vapour compression program are driven simply by commercial, non-natural functioning fluids, like the actual chlorofluorocarbons (CFCs), the hydro chlorofluorocarbons (HCFCs) as well as the hydro fluorocarbons (HFCs). They're directly responsible regarding in ozone depletion and/or global increased temperatures. Therefore, the awareness on issues including the decrease of fossil gas resources (with the actual consequent increasing prices of energy), the severe environmental problems or maybe the location challenges (e. g., remote areas) involve the development involving new technologies in addition to led the human kind to appear with greater curiosity for ecological in addition to renewable energy resources. These include wind flow, solar, hydropower, biomass in addition to geothermal energies, or maybe thermal waste from various processes. The use of power from the sun for environmental control receives much attention due to the projected world energy shortage as a result of coincidence between the actual peak of cooling demand as well as the solar radiation availability. Refrigeration is a fascinating application of power from the sun because the incident radiation as well as the need for chilly production both achieve maximum levels inside the same period. With developing countries, solar refrigeration is surely an increasingly acknowledged priority because of the desires for food in addition to vaccine preservation and mainly because that solar energy is mostly widely available in these countries. Fig. 1 illustrates a possible classification of solar chillers and refrigeration cycles. Each of the strategy, except the adsorption cooling technique, maintains some great benefits of its conventional type but is afflicted with certain limitations. Photo voltaic refrigerators, in spite of these commercial success amid solar refrigerators, have high mounted cost and hopeless prospects for on the rural site manufacture. Liquid absorption units possess the problem of producing some absorbent using the refrigerant during age group, thus requiring rectification. Reliable absorbents characteristically break down after repeated cycles of operation, as regarding the CaCl2/NH3 couple [3, 4]. Generally, special treatments on the absorbents are necessary to obtain hard porous granules [5, 6], thereby increasing the system first cost. Solar adsorption refrigerators tend not to possess these drawbacks. Most importantly, they may be completely autonomous functioning and easily flexible to simple (soft) in addition to complex (high) engineering [7]. Adsorption occurs with the surface interface involving two phases, in which cohesive forces which include electrostatic forces in addition to hydrogen bonding, act relating to the molecules of all substances regardless of their state involving aggregation. Unbalanced surface forces with the phase boundary cause changes inside the concentration of molecules with the solid/fluid interface. The method of adsorption involves separation of a substance from one phase together with its accumulation or concentration with the surface of an additional. The adsorbing phase could be the adsorbent, and the material concentrated or adsorbed with the surface of that phase could be the adsorbate. Adsorbents are seen as surface properties for instance surface area in addition to polarity. There are a number of working pairs regarding solid adsorption. For the successful operation of a solid adsorption process, careful selection of the working medium