An experimental rig of twostage evaporative cooling unit is constructed and tested in the kuwait environment. Evaporative cooling will also add humidity to the data center to ensure it stays within optimum range. Stepbystep ideas search for two stage evaporative coolers basically, anyone who is interested in. According to the american society of heating and engineers ashrae, advanced twostage evaporative coolers can use 60%75% less. Increasing the mass flow rate of water to the air precooler improves the effectiveness of the twostage. Performance of twostage evaporative coolers at various outdoor air conditions was numerically studied, and its geometric and physical. Pdf evaporative cooling is an environmentally friendly and energy efficient cooling method that only uses water as the working fluid to cool air. Installing an evaporative cooling system is an alternative method of using an air conditioning system that pumps refrigerant through compression and evaporative cycles. Performance analysis of twostage evaporative coolers.
Since the cooling energy delivered depends on both the. Liquidcooling secondary fluids and products shellandtube plateandframe. This cooling option is much more energy efficient than cooling with refrigerant standard air conditioning, but its not suitable for all cooling applications. The direct stage is also utilized to humidify the air during winter when the addition of humidity is necessary to maintain the comfort level of the space. Two stage evaporative cooling systems can improve efficiency and reduce the amount of moisture added to the air. Experimental performance of twostage evaporating cooling system. Twostage evaporative cooling system use a precooler, more efficient pads, and more efficient motors, and do not add a lot of moisture to the room as compared to single stage evaporative coolers. Two stage evaporative cooling 4 the effectiveness of the two stage evaporative cooling system is improved with an increase in mass flow rate of water. Thus, lack of knowledge about its feasibility and implementation are the motivations to study this new hybrid system. What is twostage evaporative cooling system and how it. The experimental unit utilizing evaporative cooling technology.
Pdf 1twostage evaporative cooling systems in hot and humid. Experimental investigation of twostage indirectdirect evaporative cooling system in various climatic conditions. In this paper we have studied an assisted evaporative cooling system is design and analysis to get increases in cooling efficiency to get hot environment and reducing a mint of moisture added to air. This method comprises two stages as you can guess from the name of the process. Study, design and analysis of two stages evaporative. A twostage system of nocturnal radiative and indirect. Performance analysis of a twostage evaporative cooler mechanics. Evaporative cooling is a costeffective solution that can significantly extend the economizer free cooling operating range and can be seamlessly integrated with trane systems.
The internets original and largest free woodworking plans and projects links database. The best results so far in evaporative cooling have been achieved through this method. The system is formed of an indirect evaporative cooling unit iec followed by a direct evaporative cooling unit dec. Cooling is provided whilst keeping the evaporative process outside, which avoids elevating the indoor humidity level. Two stage cooling systems are well known in the art and have been used for many years. Study, design and analysis of two stages evaporative cooling. Space cooling has become a major source of energy use, such that, during the hot summer months, cooling performance of two stage indirectdirect evaporative cooling system is experimentally. Evaporative cooling design guidelines ced engineering. Pdf experimental investigation of twostage indirectdirect. Us6931883b2 two stage indirect evaporative cooling system. Aug 06, 1985 two stage cooling systems are well known in the art and have been used for many years. Indirect direct evaporative coolers two stage evaporative.
Purushothama, in humidification and ventilation management. Since the low setting is adequate to meet household cooling demands 80% of the time, a two stage unit runs for longer periods and produces more even temperatures. Crocheting, embroidery, knitting, quilting, sewing search for 2 stage evaporative cooling system basically. After leaving the dry passages, a major air portion travels into the direct stage and the remainder of the air is induced by a pressure drop in the direct stage to.
Evaporative cooling design guidelines manual iv this report by nrg engineering is funded by the new mexico energy minerals and natural resources department, 1220 south st. Arctic indirect evaporative cooling systems idec uses high efficiency dri cool module first stage which achieves the indirect evaporative cooling using water evaporation without increasing humidity in supply air. In the present study, a mathematical model of a twostage evaporative cooling tsec system is presented, which consisted of two direct evaporative coolers and a. 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. Our plans taken from past issues of our magazine include detailed instructions cut lists and illustrations everything you need to help you build your next project. Hanging a wet cloth over an open window cools the air passing through the cloth. Basically, a two stage cooling system utilizes a first evaporative cooler to precool the incoming air. The systems include onestage direct evaporative cooling dec, onestage indirect evaporative cooler iec linked to an external cooling tower, twostage indirectdirect evaporative coolers iecdec, and threestage. For this purpose, a twostage evaporative cooling experimental setup consisting of an indirect evaporative cooling stage iec followed by a. All systems, regardless of their classification, use the same principles of forced water evaporation to reduce the temperature of the air. This cooling option is energy efficient in comparison with the refrigerant cooling technology, which only provides with standard air. Space cooling has become a major source of energy use, such that, during the hot summer months, cooling performance of twostage indirectdirect evaporative cooling system is experimentally.
This research paper explains the working principles of twostage evaporative cooling systems and assesses their performance. Portable coolers or systems with vapor compression backup are not eligible, nor is used or reconditioned equipment. When an evaporative cooler provides only a portion of the cooling effect, then it becomes a component of a central hydronic or a packaged unit system. Unlike traditional evaporative coolers, the oasys uses a molded plastic cabinet that is resistant to corrosion. Course contents evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. Energy efficient twostage evaporative cooling system. 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. The best 2 stage evaporative cooling system free download. This research paper explains the working principles of two stage evaporative cooling systems and assesses their performance in hong kong which has a hot and humid climate.
In fact, this process has been used for hundreds if not thousands of years. Ideal for high power electronics systems where heat loads have moved beyond what traditional air and water cooling systems can effectively manage. Keywords cooling, air condition system, cooling tower. Systems and methods for indirect evaporative cooling and for two stage evaporative cooling us8468846b2 en 20080722.
The twostage evaporative cooling system suffers from high capital cost and pumping costs necessary to operate the extra indirect evaporative cooling system. The systems include one stage direct evaporative cooling dec, one stage indirect evaporative cooler iec linked to an external cooling tower, two stage indirectdirect evaporative coolers iecdec, and three stage system of evaporative. Evaporative cooling an overview sciencedirect topics. The systems design was based upon the humidifying capacity of an ultrasonic humidifier supplied by a quebec company, plastique frapa inc. The system was formed of an indirect evaporative cooling unit iec followed by a direct evaporative cooling unit dec. Pdf study,design and analysis of two stage evaporative cooling. Therefore, the system introduces less moisture into a building than a conventional single stage direct evaporative cooler table 1. Their usage in extense is well documented in the book, evaporative airconditioning, by john r.
Parkers twophase evaporative liquid cooling system is based on our own patented technology, and uses noncorrosive, nonconductive fluid which vaporizes and cools hot surfaces on contact. The thermal performance of four different arrangements of evaporative air coolers have been evaluated experimentally during the hot summer of kuwait. Twostage evaporative cooling system use a precooler, more efficient pads, and more efficient motors, and do not add a lot of moisture to the room as compared to singlestage evaporative coolers. They use a precooler, more effective pads, and more efficient motors, and dont add as much humidity to the home as singlestage evaporative coolers. It is a technology that could substantially reduce the airconditioning cooling energy requirement in buildings and provide other important environmental benefits. Parkers two phase evaporative liquid cooling system is based on our own patented technology, and uses noncorrosive, nonconductive fluid which vaporizes and cools hot surfaces on contact. Evaporative cooling is a process which takes advantage of the latent heat of evaporation of water to absorb sensible heat from the surrounding air with which it is in contact. Indirectdirect according to the american society of heating and engineers ashrae, advanced two stage evaporative coolers can use 60%75% less electricity than conventional refrigerantbased ac systems. 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. Evaporative cooling is a reliable, lowtech method to provide cooler air during hot weather. Systems and methods for indirect evaporative cooling and for two stage evaporative cooling us10260818b2 en 20110221.
Get instant access to entire 2 stage evaporative cooling system today. Indirect or two stage systems can be further classified as ducted or nonducted. Pdf 1twostage evaporative cooling systems in hot and. Since the low setting is adequate to meet householdcooling demands 80% of the time, a twostage unit runs for longer periods and produces more even temperatures.
A 2 stage evaporative cooling system can deliver cool indoor air with a relative humidity in the 50%65% range, while direct system typically condition the air at. This design guidelines manual for evaporative cooling addresses the relative. Study, design and analysis of two stages evaporative cooling system prof. Thermal design of twostage evaporative cooler based on thermal. Pdf experimental investigation of twostage indirect.
Pdf twostage evaporative cooling systems in hot and humid. As they are expensive as compared to the single stage coolers they are used in areas where the day temperature exceeds 100f. At the end of the paper the procedure of designing the 2 stage evaporative cooling system for a residential building can be done. Evaporative coolers have two major advantages over traditional air conditioners. Our plans taken from past issues of our magazine include detailed instructions cut lists and illustrations everything you need to. Pdf twostage evaporative cooling systems in hot and. Equalize line dx evap evaporative condensers low temperature. Arctic evaporative coolers arctic industrial coolers.
Customers can replace an existing evaporative cooler or central ac system, or purchase a firsttime installed evaporative cooling unit, to qualify for a rebate. A two stage indirect evaporative cooler that moves air from a blower mounted above the unit, vertically downward into dry air passages in an indirect stage and turns the air flow horizontally before leaving the indirect stage. According to the american society of heating and engineers ashrae, advanced two stage evaporative coolers can use 60%75% less. Twostage evaporative cooling systems can improve efficiency and reduce the amount of moisture added to the air. Performance analysis of twostage evaporative cooler. A two stage evaporative cooling system can deliver cool indoor air with a relative humidity in the 50%65% range, while direct evaporative cooling systems typically condition the air at around 70% relative humidity. Pdf experimental performance of twostage evaporating cooling. Two stage cooling system university of arizona foundation. To the best of authors knowledge, a twostage system of nocturnal cooling and indirect evaporative cooling has not been suf.
Two stage evaporative cooling systems in hot and humid cli mate, in proceedings of the tianjinhong kong joint symposium 2009, 2930 jun 2009, tianjin, china, pp. Pdf experimental performance of twostage evaporating. Experimental evaluation of one, two, and three stage. A twostage evaporative cooling system can deliver cool indoor air with a relative humidity in the 50%65% range, while direct evaporative cooling systems typically condition the air at around 70% relative humidity. Twostage cooling means the air conditioner or heat pump has a compressor with two levels of operation. Twostage evaporative cooling systems in hot and humid cli mate, in proceedings of the tianjinhong kong joint symposium 2009, 2930 jun 2009, tianjin, china, pp. The cooling media could be as simple as a wet cloth. Discover classes, experts, and inspiration to bring your ideas to life. Design of ii stage evaporative cooling system for residential. For comparison, a conventional cooling system typically delivers air at 55f before it is distributed through ductwork throughout the house. Us6931883b2 two stage indirect evaporative cooling. The two stage evaporative cooling system suffers from high capital cost and pumping costs necessary to operate the extra indirect evaporative cooling system. Stage wise evaporative cooling systems can be either two stage or three stage.
This cooling had a two stage pad cooling system, which consists of option is much more energy. Heat and mass transfer modeling of two stage indirect. Evaporative cooling differs from typical air conditioning systems, which use vaporcompression or absorption refrigeration cycles. Pdf study,design and analysis of two stage evaporative. Us7765827b2 multistage hybrid evaporative cooling system. The best two stage evaporative coolers free download pdf and video.
When warm, dry unsaturated air is pulled through a watersoaked pad, water is evaporated and is absorbed as water vapor into the air. Experimental investigation of the performance of twostage. The best 2 stage evaporative cooling system free download pdf and video. In the first stage of a two stage cooler, warm air is precooled indirectly without adding humidity by passing inside a heat exchanger that is cooled by evaporation on the outside. The worlds most efficient and sustainable twostage evaporative cooler systems. The twostage evaporative cooling system, also known as direct or indirect cooling, is the most advanced and technologically developed cooling system, using the utilizing evaporative cooling technology.
Contact air2o to learn how our hvac solutions can save up to 70% energy. Evaporative cooling is an environmentally friendly and energy efficient cooling method that only uses water as the working fluid to cool air through the simple evaporation of water. A 2 stage evaporative cooling system aka indirectdirect cooling represents the most advanced cooling system utilizing evaporative cooling technology. Nov 03, 2018 the two stage evaporative cooling system, also known as direct or indirect cooling, is the most advanced and technologically developed cooling system, using the utilizing evaporative cooling technology. In the direct stage, the precooled air passes through a watersoaked pad and picks up humidity as it cools. Evaporative cooler single stage evaporative cooler.
Applications 3 in many locations and for many applications, evaporative cooling is. In technical terms, temperature is measured in two 2 important ways that relate to evaporative cooling. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in. What is twostage evaporative cooling system and how it works. Projected benefits of new residential evaporative cooling systems. Cooling is provided whilst keeping the evaporative process outside. Therefore, the system introduces less moisture into a building than a conventional singlestage direct evaporative cooler table 1. For comparison, a conventional cooling system typically delivers air at 55f before it is distributed through. This research takes advantage of the natural sinks as follows. Two stage evaporative air cooler manufacturers saudi arabia. Figure 6 from 1twostage evaporative cooling systems in. Twostage evaporative coolers are newer and even more efficient. Two stage cooling means the air conditioner or heat pump has a compressor with two levels of operation.
1048 1264 1342 1551 752 533 1507 1102 549 1347 12 1594 854 1576 1528 1490 273 820 1200 359 786 140 1563 1435 1423 609 1564 575 727 958 606 619 242 1238 13 545 1231