In 1905,200 btumin or 12,000btuh was established as 1 ton of refrigeration, and in 1902 a 400ton airconditioning system was installed in. The most common example in human is the process of perspiration. Assessment of evaporative cooling enhancement methods. The munters cooling method involves covering the intake area with an evaporative cooling media and running the system like a typical evaporative or swamp cooler, as shown in figure 3. Dir ect evaporative cooling dec is based on mec hanical and thermal contact bet ween. Desiccant enhanced evaporative airconditioning devap nrel. During the process of perspiration, it absorbs heat to cool the body. Our companys focus on innovation is manifest in the many patents authored by ccs executives and staff. The united states patent and trademark office has granted patent no. Evaporative cooling is produced by passing atmospheric air over wet pads and the first heat exchanger. Evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. The air passes straight across the humidifier into the cooling chamber in direct evaporative cooling system, while the air is first precooled with. Technology that enables this includes enhanced spiralfinned coil designs and adaptive controls. An evaporative cooling system is disclosed which uses a heat pipe device comprising first and second heat exchangers to transfer heat from the space being cooled to an evaporative cooler.
Evaporative cooling is an atomic physics technique to achieve high phase space densities which optical cooling techniques typically can not reach atoms trapped in optical or magnetic traps are cooled as the trap depth is decreased and the hottest atoms with the highest kinetic energy leave the trap. The evaporative cooling ec technology is based on he a t and mass transfer between air and cooling water. Pescod, a heat exchanger for e nergy saving in an airconditioning. Performance evaluation of three different types of local. Fortunately, manufacturers have stepped up to the plate, offering solutions that reduce evaporative cooling system size. Evaporative cooling definition and meaning in biology. Indirect and direct evaporativecoolingassisted outdoor air system. Heat seal strips 18 are formed at the inlet and outlet of the plates and air flow perforations 11 are formed through the plates.
The process is indicated in the psychrometric chart below. Control means for the evaporative cooler comprising a plurality of temperature. Compressed air cooling system for data center justia. The primary responsibility of a business man is to provide the secure and comfortable feeling to the clients who visit their office. Additional heat exchanger and gas washers may be included in the system. Review of research and application of evaporative cooling.
Evaporative cooling system of internal combustion engine. Their cooling effect is dependent on the temperature difference between the drybulb and wetbulb temperature wetbulb depression of the entering air, the velocity of the air moving through the medium, and the quality and condition of the medium itself. A complete cooling system will typically include a cooling tower, an evaporative condenser or some cooling element, a recirculating system, a heat exchanger, plus other equipment such as sumps, pumps, storage tanks and water treatment equipment and chemicals. It is made from specifically engineered cellulose paper that is chemically treated to resist deterioration and meets the ul environmental greenguard gold certifications emission standards. An evaporative cooling system is disclosed which uses a heat pipe device. Evaporation of water removes heat from the atmospheric air and from the first heat. Anyone who has spent some time in a hot, stuffy warehouse understands how torturous heat and humidity can be. For instance, the brine from ro processes is cooler than that of. Typically a 1kw evaporative cooling system can manage a 20kw load. A diluted absorber solution is transported from an absorber section 19 by an absorber pump 20 to a solar heat collectorregenerator 15 where the absorber solution is heated and refrigerant is partly vaporised. When warm, dry unsaturated air is pulled through a watersoaked pad, water is evaporated and is absorbed as water vapor into the air. Types of evaporative coolers direct evaporative coolers use a fan to pull outside air through media pads that are kept.
Nrel has applied for international patent protection for the devap concept see. Evaporative air conditioning is, in many instances, capable of simulating the cooler conditions so often found at or near large expanses of water. The hot atoms leaving the trap are on the tail of the maxwellboltzmann distribution and. Systecon receives patent for critichill evaporative. Used in conjunction with coolair fans, a temperature reduction of 1025 degrees is commonplace. This paper aims to investigate the evaporative cooling limitations of compressor intakeair for improving the performance of gas turbine power plants. Briefly, in accordance with my invention, i provide improved apparatus for directing a flow. Comfort cooling was obtained by ice or by chillers that used ice. Panjiva uses over 30 international data sources to help you find qualified vendors of evaporative cooling. The singleinlet direct evaporative coolers of today are more efficient than their swamp cooler counterparts of years ago. The supplemental chiller is shut down during conditions when the evaporative cooler can.
Use of standalone indirect evaporative coolers is thus relegated to arid. This is placing great pressures on an electric grid that must. One transfers the heat from warmer water to cooler air, mainly by an evaporation heattransfer process, and is known as the evaporative or wet cooling. When warm, dry unsaturated air is pulled through a water soaked pad, water is evaporated and is absorbed as water vapor into the air. Course contents evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. The limitations of the evaporative cooling capability are analyzed and formulated in terms of the characteristic dimensions involving the temperature ratio, the power gain ratio pgr, thermal efficiency change, and humidity ratio. A pump is configured to disperse water over the evaporative medium pad. Celdek evaporative cooling pad celdek evaporative cooling pads are designed to provide maximum cooling, low pressure drop and years of reliable service.
A control system operates the water pump and the fan distributes the cool air. Types of cooling processes two basic types of water cooling processes are commonly used. Overview of the maisotsenko cycle a way towards dew. Principles of evaporative cooling system a pdh online. Us5460004a desiccant cooling system with evaporative. The only significant energy use is in the fan for the air movement. Technology, markets, and economics larry kinney, southwest energy efficiency project abstract the southwest is growing rapidlya 37% increase in population is projected from 2000 to 2020 versus 16% for the total us. The processes and apparatus of the present patent disclosure are, however. Processes of the type described in the maisotsenko patents have come to be known as indirect evaporative cooling processes. The hydrophobic porous material has pores with predetermined dimensions so as to resist any fluid in its liquid state from. A typical design, as shown in a 1945 patent, includes a water reservoir usually with level controlled by a float valve, a pump to. A system for cooling and gases in which the process gas is dehumidified in a desiccant module and subsequently treated in a heat exchanger. Evaporative cooling simulations are carried out to provide a guideline for the optimization in the experiment.
The conversion of sensible heat to latent heat causes a decrease in the ambient temperature as water is. The cooled atmospheric air is then used to cool the condenser of a vapor. Air cooling systemsfor thermal comfort were built in the 1890s, but they did not find widespread use until the development of mechanical refrigeration in the early 1900s. Evaporative aircooling is an environmentally friendly and energy efficient method of cooling air using water as cooling medium. Many households use conventional cooling systems as a backup to their evaporative cooling systems during these periods. The benefit of a recirculation system is that the flow directed over the media can be sufficiently higher than the evaporation rate to achieve a reasonable distribution and minimize the size. The major components of the evaporator cooling system are the evaporative cooling unit and the ductwork. Concept of evaporative cooling evaporative cooling is the process by which the temperature of a substance is reduced due to the cooling effect from the evaporation of water.
Claims were only used as general guidance as to what type of. Evaporative cooling and boseeinstein condensation of rb. These patents mark ccs advancements in cooling tower structure and improved cooling tower thermal performance. Adjustable sump water bleedoff valve assembly in cooling tower and direct evaporative section. Patent granted for aircraft liquid cooling apparatus. In the united states, this type of system is marketed under the iq. Two types of space loads affect building humidity and temperature. Installing an evaporative cooling system is an alternative method of using an air conditioning system that pumps refrigerant through compression and evaporative cycles. The direct evaporative cooling process in a psychrometric chart air at with dry bulb temperature 70 o f and relative moisture 60% state a is cooled down state b by evaporating water.
Asetek, a company known for designing watercooling solutions for pc hardware that it sometimes licenses to other manufacturers, has lost a patent infringement lawsuit it had levied against cooler master. When viewed in this light, mechanical evaporative cooling systems are often far more efficient than alternative dry systems. The following texts are the property of their respective authors and we thank them for giving us the opportunity to share for free to students, teachers and users of the web their texts will used only for illustrative educational and scientific purposes only. Us4693852a droplet injection system for evaporative. The other transfers the heat from warmer water to cooler air by a. We deliver energy efficient, cost effective evaporative cooling systems that keep spaces, premises, products, people and animals cool, at a cost that wont break the bank. A combination air conditioner comprising a refrigeration type air conditioner and an evaporatively cooled. Evaporative cooling is the natural way of cooling, similar to a breeze flowing across a lake. Evaporative cooling is a reliable, lowtech method to provide cooler air during hot weather. Evaporative cooling pads that are saturated with water, a substantial cooling effect is realized due to the evaporation of that water. In a preferred embodiment, the heat exchanger has a dry channel in which. Absorptiontype cooling device for household use, according to patent document jp2010032193a.
Water is pumped at ordinary pressures to a distributing cap that. Both patents reference a liquidcooling system connected to a pump and radiator that is designed to be fully integrated into a single, maintenancefree. Cooltech is all about creating intelligent technologies for a cleaner, greener environment. Us6854278b2 method of evaporative cooling of a fluid and. This patent describes a motor vehicle having an internal combustion engine mounted in an engine room of a vehicle body comprising. Evaporative cooling systems building america solution center. A short presentation about the definition of evaporative cooling and how it compares to traditional air conditioning. Air cooling patents and patent applications class 261. An evaporative cooler cools the air by means of the evaporation of water. The new systems improve and expand capability while reducing energy use and water consumption.
The results obtained for relative humidity from the greenhouses with different types of evaporative cooling pads, as well as for the conditions outside the greenhouses, at 8 am are shown in table 2 and fig. The system is operable in either an open or closed system to generate either cold gas or cold fluid or both. An evaporative cooling system is disclosed which uses a heat pipe device comprising. The greenhouse with sliced wood pads gave the lowest relative humidity 39. The patented aaon evaporativecooled condenser in the evaporativecooled condensing process, water is sprayed over the condenser coil as the condenser fans draw air across the coil to evaporate the spray and cool the refrigerant tubes toward the ambient wet bulb. The analysis of variance showed that there were significant differences p 0. An evaporative cooling membrane device is disclosed having a flat or pleated plate housing with an enclosed bottom and an exposed top that is covered with at least one sheet of hydrophobic porous material having a thin thickness so as to serve as a membrane. An improved air cooling system wherein the water is cooled with the help of refrigerator compressor to 57 degree centigrade with the help of condenser, expansion device and an evaporator and wherein the body of the cooler has three sides wood wooi pads through which the chilled water passes through with the help of the pump. With the proposed evaporative aircooling system, we can achieve the reduction of the temperature. Principle of evaporative free air cooling workspace. The pump is configured to cooperate with the pan to recirculate. Field data performance of the evaporative cooling apparatus. Principles and application of evaporative cooling systems. In the chart below are normal dimensions for these components.
Improving best air conditioner efficiency by 2030% through a high. Mosharinovel modeling of an indirect evaporative cooling system with crossflow configuration. While an evaporative cooling system can effectively meet the objectives of comfort cooling, it usually does not eliminate the need for. Asetek files patent infringement lawsuit against cooler. The system includes a housing including a metal base sheet and a metal side wall and having at least one opening fitted with an evaporative medium pad and an exhaust vent. Heat exchanger plates 6 for indirect evaporative coolers, of the type having a. It is not only uncomfortable to work in, but it can be downright dangerous for the welfare of your workers. Suited for virtually all geographic locations, the. At least one of the plenums can supply air to a computer room. Using a control system to minimise energy usage of fans coupled with evaporative cooling, relatively low flow rates of air are required. What are the advantages and disadvantages of evaporative. Co ltd multiple type air conditioner for combined use of refrigeration and heating. A lawsuit filed earlier this month by liquid cooling solutions developer asetek alleges that cooler masters seidon family of sealedloop coolers introduced recently infringe upon patent no. Two types of desiccant dehumidification processes are.
Wo2010011687a3 heat exchanger plate for indirect evaporative. They state, in evaluating the best cooling strategy for a data center, it is critical to view water usage holistically, including water use where the power is made. Extreme heat and humidity can, and frequently does, cause heat strokes. The air temperature is lowered due to its contact with the water and has a relaxing, cooling effect on people. The operating efficiency of indirect evaporative cooling processes and. Asetek loses patent infringement lawsuit against cooler. Invented by systecons engineering team, led by ceo terry moses, critichill is an indirect evaporative cooling system with a supplemental chiller that can be bypassed as weather conditions dictate. Limitations of inlet air evaporative cooling system for. A system for removing heat from components in a computer room of data center includes one or more air storage containers that hold compressed air, one or more compressors that supply compressed air to the air storage containers, and one or more plenums in fluid communication with at least one of the storage containers. Cooling through evaporation is the natural occurrence. International journal of engineering research and general. An evaporative cooler is a device that cools air through the evaporation of water.
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