Ethanolactivated carbon is a promising adsorption pair for cooling applications. Khattab solar energy department, national research center, tahrir street, cairo, egypt received 3 june 2003. Also, intermittent adsorption and absorption systems for food refrigeration is a viable prospect where extreme insulation is used. A novel solarpowered adsorption refrigeration module n. Nitin korde2 1 pg student, department of mechanical engineering, ghrcoem, ahmednagar, sppu, pune, india 2 guides, hod, department of mechanical engineering, ghrcoem, pune, sppu, pune, india abstract the sun is a magnificent energy source for us. Performance of the solar adsorption refrigeration system under various conditions and parameters for iraq climate. Therefore, it is necessary to increase the systems performance with higher cop. College of engineering and technology, jalna abstractthe adsorption refrigeration is based on the evaporation and condensation of a refrigerant combined with adsorption. Adsorption refrigeration, adsorbent, adsorbate, adsorption airconditioner, adsorption cooling,desorption, solar energy. Compared to absorption refrigeration, which is usually large in system size, there are preferable advantages of adsorption refrigeration, such as lower temperature requirement of heat source, smaller system, flexible application, etc.
None of these publications is available in electronic form. In this design a physical adsorption and chemical reactions are used simultaneously for a heat and cold generation. To develop such a system with low cost and higher cop, the. Realization and test of the adsorption refrigeration prototype the adsorption collector comprises two 2 external tubes with a diameter of 40 mm containing each one a coaxial tube with a diameter of 14 mm and a length of 450 mm. Key features principle of adsorption refrigeration cycle fig. The general goal of this paper is to present the results of an investigation of a new environmentally friendly refrigerator. This system uses a mobile adsorber, which is regenerated out of the refrigeration cycle and no condenser is applied, because the solar regeneration is made in the ambient air for the regeneration, a sk14 solar cooker is considered. Aug 15, 2010 the solar adsorption refrigeration sar system has economical and environmental aspects that motivate many researches to investigate its capability in cooling system design. However, certain drawbacks have become obstacles to its real applications and commercialization. Design and realization of a solar adsorption refrigeration. The adsorption refrigeration system has several advantages compared to the absorption refrigeration system. The solar adsorption refrigeration sar system has economical and environmental aspects that motivate many researches to investigate its capability in cooling system design. The solid adsorbent has the affinity to adsorb the refrigerant vapour. Result and discussion heat transfer in the adsorbent bed the adsorption refrigeration cycle is a heat powered cycle, where the adsorbent bed is the thermally driven compressor.
Adsorption refrigeration based on condensation and evaporation with adsorption reaction. This paper proposes a new approach for the performance analysis of a singlestage solar adsorption refrigeration system with activated carbonr4a as working pair. Solar adsorption refrigeration represents important criteria of solar energy due to excellent matching between high sunshine and the refrigeration need. In recent years, considerable attention has been paid to adsorption refrigeration. Electricity demand peaks on hot summer days150 gigawatts more in. Adsorption systems can be activated by a heat source with a temperature as low as 50c 122f, while the heat source temperature for an absorption system should be at least 90c. Absorption refrigeration systems that use librwater as a refrigerant have a coefficient of performance cop in the range of 0.
The adsorption refrigeration system was composed of the adsorption bed, the evaporator, the condenser, the vacuum pump, and the solar trough collector figure 1. An experimental study was performed on an adsorption refrigeration unit powered by a solar energy and equipped with three different types of activated carbon 1. The adsorption compressor operates in two modes adsorption and desorption when it is. Experimental investigation of silica gel water adsorption system 88 v. Review on study of solar powered adsorption refrigeration system. Solar airconditioning and refrigeration achievements. Adsorption refrigeration free download as powerpoint presentation.
Intermittent adsorption refrigerator energy forum at permies. A fin tube type solar adsorption refrigeration system, cn 202209810 u. The increasing fossil fuel price and the awareness of environmental problems offer many potential applications to thermal powered adsorption cooling. Review and future trends of solar adsorption refrigeration.
However, the cop of the prevailing solar adsorption refrigeration system is quite low. Experimental study of solar powered adsorption refrigeration system sneha patil1 s. Adsorption refrigeration system uses adsorbent beds to adsorb and desorb a refrigerant to obtain cooling effect. Refrigerator which runs on electricity provided by solar energy is known as solar refrigeration. Low adsorption heat is beneficial to the systems cop because the majority of heat consumption in the desorption phase is the adsorption heat.
This system has a lower efficiency, which leads to a higher need for driving energy. Experimental study on solarpowered adsorption refrigeration cycle. Solar adsorption refrigeration system is useful for requirements such as icemaking, air conditioning, medical and food reserve system in remote areas 2. Hence, various continuous adsorption cycles depending on their. Need refrigeration in areas not connected to power grid need to minimize environmental impact and fuel cost. Driving heat sources for thermal cooling instead of using electricity, the absorption and adsorption chillers are driven by heat sources. In simple words an adsorption is the process that key words. High temperature flat plate, concentrating or evacuated tube solar collectors are needed for improved cop. Final project solar refrigerator diy science fall 2015. Performance analysis of solar adsorption cooling system effect of. Systems capable of providing chilled water at 3 oc are also available. The refrigerating effect produced or the heat absorbed by ammonia refrigerant in the evaporator is qe h4 h3 kjkg of ammonia say the mass flow rate of ammonia in the evaporator be mr. The research on the adsorption refrigeration has been paid wide attention in recent years.
The zeopower company, and eg solar, both manufacture commercial versions of solar adsorption cooling or refrigeration systems. Introduction the adsorbate the molecules or atoms being. Experimental system of solar adsorption refrigeration with. Solar cooling used for solar air conditioning a clean. Solar airconditioning and refrigeration achievements and challenges hansmartin henning fraunhoferinstitut fur solare energiesysteme ise, freiburggermany. The system utilises a common evaporator placed inside a refrigerator box, a condenser, an expansion. In this study, multidimensional mathematical models have been generated to predict the coefficient of performance cop value of the sar system as function of the. Use of artificial neural network has been proposed to determine the performance parameters of the system, namely, coefficient of performance, specific cooling power, adsorbent bed thermal compressor discharge temperature, and. Electricity demand peaks on hot summer days150 gigawatts more in summer than winter in the u. History deserves to be remembered recommended for you. The solar adsorption refrigeration system has been tested under the meteorological conditions of calicut latitude of 11. Experimental study of solar powered adsorption refrigeration. A novel solarpowered adsorption refrigeration module. Solar adsorption refrigeration system is one of the promising solar thermal refrigeration system.
Advancement of solar adsorption cooling by means of heat. Pdf performance of the solar adsorption refrigeration system. In the last years, adsorption refrigerators using water as refrigerant and. Most of the solar powered icemakers designed can achieve a daily production of ice between 4 to 6 kg per m2 of solar collector, with a typical solar coefficient of performance between 0. Consequently, selection and optimization of solar collector is a vital role in the adsorption refrigeration system. Robertson, phillips, and the history of the screwdriver duration. The refrigerant pair can be taken by zeolite in powder form and water as refrigerant. In this study, solarpowered adsorption refrigeration cycle with generator filled by different adsorbents has been tested by exposing to solar radiation in medan city. Mechanical refrigerators powered by solar cells are available, but are too expensive. Solarpowered refrigerators may be most commonly used in the future generation.
Inside an insulated, closed cool chamber 1, an evaporator 2 holds liquid ethanol, which evaporates to cool the vaccines and is adsorbed by activated coal carbon stored in pipes of a solar collector 3 during the night. Activated carbons have good adsorption affinity to alcohols such as ethanol. Technology development in the solar adsorption refrigeration systems. There are 2 types of solar refrigerators the high tech expensive kind use a solar panel to power a normalfunctioning refrigerator the also technical but less expensive kind uses a. Experiments on solar adsorption refrigeration using zeolite and water siegfried kreussler and detlef bolz laboratory for solar energy, university of applied sciences luebeck, stephensonstr. The dc electrical power drives the compressor to circulate refrigerant through a vapor compression refrigeration loop that extracts heat from an insulated enclosure. New opportunities for solar adsorption refrigeration. An automatic solar tracking device with a parabolic trough was manufactured and applied in the system to improve the efficiency of the solar collector. Continuous solar adsorption refrigeration systems are being reported widely because of their higher system performance over intermittent alternatives and for their timely coincidence with the requirement of the cooling and refrigeration demand. A number of absorption refrigeration systems and research options are provided and discussed. Solar refrigerator the hotter it gets, the more important it is for cool food to stay cold. Oct 20, 2008 solar refrigeration can also be inexpensive and it would give the electric grid muchneeded relief.
Solar adsorption refrigeration sar system modeling. Infante ferreirab,1 aarsenal research, sustainable energy systems, gie. Study of the performance of a solar adsorption cooling system. Performance prediction of solar adsorption refrigeration.
A solarpowered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy solarpowered refrigerators are able to keep perishable goods such as meat and dairy cool in hot climates, and are used to keep much needed vaccines at their appropriate temperature to avoid spoilage. Furthermore, the thermodynamic cycle of the adsorption refrigeration system is illustrated on clapeyron diagram. Adsorption has been shown to be achieved by refrigeration for a long time zigler 1999. This cycle can be summarized in four thermodynamic steps. Solar adsorption refrigeration system is one of the. I do, however, consider the prospect of an open system described previously to be promising. Mani professor refrigeration and airconditioning laboratory department of mechanical engineering indian institute of technology madras chennai 600 036 india 122720 solar refrigeration. The external tubes are covered with black paint to increase the absorptivity at their surfaces. However, the adsorption cooling machines still have some disadvantages that hinder their wide application. May 09, 2016 robertson, phillips, and the history of the screwdriver duration. It is hoped that, this paper should be useful for any newcomer in this. Developing the world to help mitigate poverty and climate change. Other companies, like sundanzer, manufacture solar coolers or refrigerators that use conventional compressiontype refrigeration achieved by electrical systems based upon photovoltaics.
Adsorption chiller for solar air conditioning youtube. Pdf experimental analysis of zeolite base solar vapour. Review on solar adsorption refrigeration system mr. Preliminary studies on synthesis of zeolite from local clay, nigeria journal of scientific research 4 2712. Later, and with the development in power station efficiency and the introduction of chlorofluorocarbons in the 1930s, sorption refrigeration became a key technology enrique vladimir 1995. The adsorption container is integrated with a flat plate solar collector and contains a porous adsorbent medium. There is no need to drill and refine it or mine it out of the ground. A solar refrigerator is made of a solar collector, adsorbed natural gas vessel ang, and compact, portable refrigeration system, which consists of two. Solar airconditioning and refrigeration achievements and. Solar adsorption refrigeration is an option to overtake the drawbacks of the conventional cooling system. One of them is the rate of heat transfer which is the most important. There are 2 types of solar refrigerators the high tech expensive kind use a solar panel to power a normalfunctioning refrigerator the also technical but less expensive kind uses a coolant heated up by the. As solar energy is used as an energy source, cooling systems are environment friendly and it compete the absorption and compression devices. Adsorption cooling, solar energy, solar collectors.
Technology development in the solar adsorption refrigeration. Continuous adsorption can be realized through various cycles which are detailed in 3. Now, let as assume the refrigeration capacity of the unit to be 1tr. Jul 11, 2016 adsorption chiller compatible with the use of flattype solar collectors as well as with lowgrade waste heat from industrial processes and engines. Refrigeration technology about solar adsorption, absorption. Adsorption chiller compatible with the use of flattype solar collectors as well as with lowgrade waste heat from industrial processes and engines.
In the present study the performance of a two bed adsorption cooling. Ethanol is an environmentally benign, nontoxic refrigerant suitable for both air conditioning and refrigeration cooling systems. This enclosure includes the thermal reservoir and a phase change material. Review on study of solar powered adsorption refrigeration. Solar refrigeration can also be inexpensive and it would give the electric grid muchneeded relief.