Evaporativecooling air conditioning systems use the cooling effect of the. In this research, the feasibility of solar assisted desiccant. Oncethrough cooling withdraws large volumes 23,000 to 27,000 galmwh from a body of water and returns it to that source at an elevated temperature, which causes additional evaporative loss from that body of water. When evaporative processes are used to cool an element of the building, which then acts as a heat sink, this is known as indirect evaporative cooling. Extending produce quality for longer periods makes the solar powered evaporative cooling system suitable for use in rural communities where there is no electricity. Recirculating evaporative cooling withdraws a lesser amount 500 to 650. Evaporative coolers, also called swamp coolers, rely on this principle, cooling outdoor air by passing it over watersaturated pads, causing the water to evaporate into it. Department of energy building america program through the midwest research institute national renewable energy laboratory division n. The objective of this paper is to study the performance of a solar driven desiccant evaporative cooling system in providing cold water for a radiant airconditioning system in khartoum sudan. Solar cooling systems are attractive because cooling is most needed when solar energy is most available. Absorbs up to 87% of your roofs solar load reduces upfront and everyday costs lowers bills for kwh used lowers demand charges as your peak drops reduces wear on existing ac when present extends roof life, by keeping it cool all day protects roofs against solar shock of sudden.
In a second embodiment of the invention, the cooling system comprises a solar cooling unit, one or more modular refrigeration chiller units and a water loop that can be selectively directed through the solar cooling unit, through one or more of the modular refrigeration chiller units or through a combination thereof. These components are alu minum pad, cool air fan, pump and sump. Oct 28, 2015 this study was designed to develop a solar powered evaporative cooling system for the storage of perishable crops. An overview of opencycle desiccant cooling systems and. To date, most collectors used in solar cooling systems are the high. Solar cooling is one of the promising technologies given the fact that solar energy is the cheapest and most widely available renewable energy that matches the cooling load requirements. Concentrating solar power commercial application study. Further increase in heat exchanger effectiveness is unlikely.
Advanced solar assisted desiccant and evaporative cooling. Evaporativecooling systems are characterised by low energy use compared with refrigeration cooling. The basic design consists of a storage pot placed inside a bigger pot that holds water. An o ce building located in chabahar, iran, as a high cooling load demanding region, was considered as the case study. Solar cooling systems by themselves, however, are usually not economical at present fuel costs. Solar airconditioning and refrigeration achievements and.
Us8283555b2 photovoltaic solar power generation system with. Development of a solar powered evaporative cooling storage. However, its performance can be improved using highperformance cooling pads and solar panels. You will learn about absorption cooling systems, rankine cycle heat engine cooling systems, desiccant cooling, and other solarpowered systems having potential for commercial applications. In doing so, a computer program was used to simulate the. Thermal solar cooling techniques absorption cooling desiccant cooling energy is transferred through phasechange processes energy is transferred through latent heat processes adsorption cooling energy is transferred through phasechange processes 12. In evaporative cooling devices, refrigeration is generally achieved by. The solar system may consist of xcpc collectors using water as fluid and a water storage tank, which will increase the use of the solar system. Modeling and simulation of evaporative cooling system in. In these way our solar powered indirect evaporative cooling can be used all year air conditioning system.
Driving force of system is based on solar chimney and electric fan for day and night time operations, respectively. This work concerns an innovative solar assisted desiccant and evaporative cooling dec system for building air conditioning. Allowing direct solar exposure to the media pads increases the evaporation rate. The objective of this paper is to study the performance of a solardriven desiccant evaporative cooling system in providing cold water for a radiant airconditioning system in khartoum sudan. We love living here and wish we could take our home with us, but we cant. Absorption cooling absorbent refrigerant libr h2o h2o nh3 substances used. Two temperatures are important when dealing with evaporative cooling systemsdry bulb temperature and wet bulb temperature. You can also choose from ce, ul, and csa solar evaporative cooler there are 1,631 suppliers who sells solar evaporative cooler on, mainly located in asia. Energy performance building indoor air solar desiccant based cooling system trnsys. How to convert a swamp cooler to solar powered hunker. An evaporative cooler is a device that cools air through the evaporation of water.
Evaporative cooling systems are characterised by low energy use compared with refrigeration cooling. Thus, both cooling capacity and system cop will be maximized for the degree of dryness state 2 achieved. An evaporative cooling system consists of an intake chamber, filters, supply fan, directcontact or indirectcontact heat exchanger, exhaust fan, water sprays, recirculating water pump, and water sump. This cooling system can maintain a greenhouse interior temperature and relative humidity to about 20. Solarpowered air conditioning for buildings in hot. The main application of evaporative cooling is the airconditioning of premises in hot and arid regions.
As the water evaporates it cools the pad and the air that passes through it. Introduction the cooling unit consists of a solar panel mounted on a location to fetch maximum sunlight and it is connected by a battery and an inverter unit through a network of electrical wires, which in turn is connected with the evaporative cooler. Humidification of excessively dry air improves comfort to an extent. May 06, 2014 thermal solar cooling techniques absorption cooling desiccant cooling energy is transferred through phasechange processes energy is transferred through latent heat processes adsorption cooling energy is transferred through phasechange processes 12. Solar cooling seminar report, ppt, pdf for mechanical. Fan and pad greenhouse evaporative cooling systems 2 frequently drift out of calibration and should be checked against standards on a regular basis. However, when the desiccant cooling system must handle the entire load, it overdries the process air so evaporative cooling can be used for the sensible cooling. The evaporative cooler was tested and evaluated using. Also explore the seminar topics paper on solar cooling with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020. An emerging solution for homes in hot dry climates with modest cooling loads prepared for u. Components of a solar cooling system a solar cooling installation consists of a typical solar thermal system made up of solar collectors, storage tank, control unit, pipes and pumps and a thermally driven cooling machine. The solar concentrator focuses sunlight onto a front side the cell to generate electricity. The equipment operates on the principle of evaporative cooling and increasing the relative humidity rh in the preservation chamber.
Artic solar thermal collectors are normally applied as heating system in solar assisted desiccant cooling systems. Desiccant cooling systems are very good at providing latent cooling by reducing the humidity ratio of building air. An introduction to solar cooling systems pdh library. Evaporative cooling evaporative cooling is a process that reduces air temperature by evaporation of water into the airstream. The best time to measure wet bulb temperature to calculate the potential cooling performance of the evaporative cooling system is in the afternoon. Analysis of advanced solar hybrid desiccant cooling systems. This cool dry air is then fed into the home in order to cool down the rooms. This paper describes design and fabrication of air conditioning system that uses solar evaporation to obtain cooling. Figures based on cooling an area of 100 sqm, with 6 areas to be cooled. You will be introduced to the fundamentals of system sizing, controls, piping, pumps and valves, and solar collectors. Efficient active cooling evaporative cooling in some climates, evaporative swamp coolers can be very effective in both reducing energy bills and avoiding that crumby, airconditioned space feeling. After 31 years of living in our home in northern california, we are moving to a new location.
Cooling is provided whilst keeping the evaporative process outside, which avoids elevating the indoor humidity level. An evaporativecooling system consists of an intake chamber, filters, supply fan, directcontact or indirectcontact heat exchanger, exhaust fan, water sprays, recirculating water pump, and water sump. Some examples of evaporative cooling designs are described below. If solar cooling can be combined with solar heating, the solar system can be more fully utilized and the economic benefits should increase. Solar cooling is especially appealing if the solar thermal system is also used for other applications such as heating, domestic hot water, etc. Feasability of solar desiccant evaporative cooling. Thus, maximum operation time and lowcost driving heat for sorption chillers are key for economic efficiency of solar cooling systems. The systems design was based upon the humidifying capacity of an ultrasonic humidifier supplied by a quebec company, plastique frapa inc. Review of passive heatingcooling systems of buildings. In winter, solar heated air used directly to warm the house. Dehumidifiers, heat exchangers, indirect evaporative coolers, and vapor compression chillers were arranged into four configura tions to cover a range of design.
A solar power generation system includes a plurality of individual modules, each formed from a photovoltaic cell, a solar concentrator, a sealed evaporative cooling system and a heat sink. In this system, airtoair packaged wet heat exchangers are used to maximize the exploitation of the evaporative cooling potential associated with the exhaust air stream. An overview of opencycle desiccant cooling systems and materials. Evaporative cooling an overview sciencedirect topics. This can best be understood by summarizing the different solar cooling techniques.
Simulation analysis of the four configurations of solar. A basic system with all pv output inverted to ac, and all indirect. Pdf design and performance analysis of a small solar evaporative. The design will depend on the materials available and the users requirements. Solar evaporation, evaporative cooling, water level sensor. Pot designs these are simple designs of evaporative coolers that can be used in the home. Evaporative cooling is the most economical concept for cooling of a building. This is achieved by blowing warm, dry air through a permeable pad that is soaked with water. Explore solar cooling with free download of seminar report and ppt in pdf and doc format. Absorbs up to 87% of your roofs solar load reduces upfront and everyday costs lowers bills for kwh used lowers demand charges as your peak drops reduces wear on existing ac when present extends roof life, by keeping it cool all day protects roofs against solar shock of sudden summer storms. Application of solaroperated liquid desiccant evaporative cooling system for banana ripening and cold storage. Combining solar heating and cooling systems is not easy because of the different system requirements.
A swamp cooler is a simple device that produces cool air by evaporative cooling. The best time to measure wet bulb temperature to calculate the potential cooling performance of the evaporative cooling system is in. These devices are com monly used in air conditioning systems for heat recovery purposes during the winter. Application of solar operated liquid desiccant evaporative cooling system for banana ripening and cold storage. Explore hybrid solar desiccant cooling system with free download of seminar report and ppt in pdf and doc format. In this research, the feasibility of solar assisted desiccant evaporative cooling system for o ce buildings was studied. Also explore the seminar topics paper on hybrid solar desiccant cooling system with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019. In operation since 2007 brand of desiccant unit klingenburg desiccant cooling system solid licl min. A wide variety of solar evaporative cooler options are available to you, such as evaporative air cooler, air cooler, and air curtain. In many countries, solar cooling systems are one of the best candidates to tackling. Solar air cooler project pdf this guide was published within the framework of the solco project which is co. Pdf design and construction of an evaporative cooling.
Evaporative cooling basics from ca consumer energy center. May 11, 2017 figures based on cooling an area of 100 sqm, with 6 areas to be cooled. The basic idea was to design a system that is affordable, consumes less energy and gives the same effect as that of the conventional. As with solar heating, the techniques for solar cooling consist of passive systems and active systems. Advanced solar assisted desiccant and evaporative cooling system. This study was designed to develop a solar powered evaporative cooling system for the storage of perishable crops. Evaporative cooling differs from typical air conditioning systems, which use vaporcompression or absorption refrigeration cycles. Hybrid solar desiccant cooling system seminar report, ppt. Indirect evaporative cooling heat and mass transfer research heat and mass exchanger effectiveness energy ef. Within this context, wipo has started the project developing tools. You will learn about absorption cooling systems, rankine cycle heat engine cooling systems, desiccant cooling, and other solar powered systems having potential for commercial applications. In lowhumidity areas, evaporating water into the air provides a natural and energyefficient means of cooling. Pdf solar assisted evaporative cooling based passive air. Consequently, prototype solar desiccant cooling systems have been designed with heat exchangers having 0.
Analysis of advanced solar hybrid desiccant cooling. Csiro has invented a new three in one solar air conditioning system that provides hot water, cooling and heating. Storing cool energy produced during sunshine hours in a cool thermal storage tank is yet another option of storing energy. The evaporative cooler was tested and evaluated using tomato roma. Introduction to solar cooling systems ced engineering. An evaporative cooler also swamp cooler, swamp box, desert cooler and wet air cooler is a device that cools air through the evaporation of water. Comparison of different solarassisted air conditioning.
1495 786 456 990 788 559 289 771 332 784 316 1113 1186 140 125 1401 282 139 183 757 1377 1454 1385 305 1099 954 913 1023 387 962 1418 1054 614 1007 230 10 1136 1343 1073