The roof configuration can also influence the temperature increase. Based on their construction the various types of evaporators are. The mc1 maxcool pump is designed for use the mc1 maxcool pump is designed for use in 115volt evaporative coolers rated up to 11,000 cfm of air delivery. These high capacity units come in 24 cataloged formations and range in size from 6,000 cfm to over 100,000 cfm.
Any humidity at 45% or less the swamp coolers evaporative work well. The systems design was based upon the humidifying capacity of an ultrasonic humidifier supplied by a quebec company, plastique frapa inc. The amount of heat absorbed by the water is lost given up by the air causing the air to become cool. Shop for sheet metal installation components at ferguson. The cooling effect of the evaporation of water is applied directly to the condenser refrigerant pipes in the evaporative condenser figs 6. Diagrams throughout this manual show the evaporative cooling system mounted to a customersupplied wood frame.
The framework is mounted outside the house on a pole with a metal cone to deter rats and a good coating of grease to prevent ants getting to the food. There are two basic types of evaporative air coolers eacs. Fan and pad greenhouse evaporative cooling systems 3 area covered by plants, and floor material i. Design and evaluation of galvanized metal sheets as evaporative cooling pads article pdf available in journal of king saud university 181 january 2005. Indirect evaporative air conditioning seeley international. Developments in the evaporative cooling industry have reliably increased the efficiency. Great for hot flashes from menopause, these temperature regulating. The mass flow of water over the condenser tubes must be enough to ensure wetting of the tube surface, and is of the order of 80160 times the quantity evaporated. New mexicans are most familiar with direct eacs that are also commonly used for residential cooling.
This section describes the evaporative coolers models for hvac in energyplus. Course contents evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. Energyeff icient ducted technical sheet evaporative coolers an economical cooling option for central air conditioning because of californias relatively low humidity, an energyefficient ducted evaporative cooler eedec may be a viable option and an economical alternative to a conventional central air conditioner. Water treatment cooling towers, evaporative condensers. Galvanized steel consists of a thin coating of zinc fused to a steel substrate. There are different kinds of evaporative cooling systems. It is ul classified for safety and features a low level design ensuring normal operation even if the coolers water level drops to as low as 12 in.
Types of cooling towers two basic types of evaporative cooling devices are used. Evaporative cooling works by evaporating water in the air stream. See page 8 for required clearances and lumber for customersupplied frame. Evaporative cooling an overview sciencedirect topics. Indirect evaporative air conditioners use a hyperefficient counterflow heat exchanger to produce 100% fresh, cool, outside air, with no added moisture. To resume operation of a drained system and at initial startup, clean all debris from the cold water basin and fill the system with fresh water. Leading the industry in providing solutions to the ageold problems associated with conventional coolers, mastercool is the smart choice. Indirect evaporative cooling performance is based on 75% saturation efficiency. Indirectdirect cooling is also a more effective system than standard evaporative units in that it can lower the supply air temperature by as much as 10f. Specializing in mastercool coolers and air conditioning parts and supplies. All evaporative cooler types have one thing in common.
It is designed for the environmentally and energy conscious consumer, and uses natures refrigerant, water, to cool unlike. A forming process for heated sheet metal, such as hotstamping, has limited use in deformable shapes. The first of these, the directcontact or open cooling tower figure 3, ex poses water directly to the cooling atmosphere, thereby transferring the source heat load directly to the air. The driving force of either direct or indirect evaporative cooling is the temperature difference between the drybulb table 1 a general comparison between the currently available air conditioning systems.
Evaporative cooling uses the fact that water will absorb a. Biggest problem facing the indirect evaporative cooling iec technology lies in its high level of dependency to ambient air condition. Evaporative cooling differs from typical air conditioning systems, which use vaporcompression or absorption refrigeration cycles. C aca aa tab c a 2016 this table of contents lists the complete contents of the rses service application manuals sam issued to date. If you purchased a metal frame kit from us for your evaporative cooling, read the information that follows. On the other hand, the indirect cooling method allows industrial spaces, restaurants or other businesses to cool their spaces to temperatures that are lower than those offered by portable swamp coolers like cool boss. In the case of evaporative cooling, the heat comes from the outdoor air being supplied to the building. The equipment operates on the principle of evaporative cooling and increasing the relative hu midity rh in the preservation chamber. Sam is no longer available in print formhowever, sam is available exclusively to rses members online. Evaporative cooling for metal buildings showing 115 of 15 messages.
Portable coolers cool small places or rooms, generally up to 300 square feet. The cooling water is contained inside a closed piping system and evaporative cooling occurs by running water over the pipe containing the heated water. Unlike central air conditioning systems that recirculate the same air, evaporative coolers provide a steady stream of fresh air into the house. 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. Evaporative cooler types evaporative coolers cool boss. 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. Pdf design and evaluation of galvanized metal sheets as. The 15 to 40fcooler air is then directed into the home, and pushes warmer air out through windows.
We carry many parts and supplies for evaporative coolers. Evaporative cooling technology is simple and basically consists of wind and water. The process air flows across the surfaces of the layers at a particular velocity, which causes water inside the voids of the porous layers to evaporate. It will consist of the component parts as listed in the following sections. Water treatment cooling towers, evaporative condensers, ice. For these reasons and more the idu is an excellent option for industrialcommercial applications that require anywhere from 1,000 cfm up to 120,000 cfm. Evaporative cooling in evaporative cooling process, both temperature and humidity of air changes along the lines of constant wet bulb temperature shown as line ab. 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. There is no change in heat content and the energy is merely converted from sensible energy to latent energy.
Quick guide to evaporative cooling for industrial and commercial buildings. This manual is intended to be used as a tool for the design of successful and efficient evaporative cooling systems and will allow engineers to specify and design evaporative cooling systems with confidence. Evaporative cooling design guidelines ced engineering. This is because workers are frequently exposed to burns, cuts, falls and scrapes, when they are fabricating sheet metal. Celdek evaporative media is made from a specially engineered cellulose paper that is chemically treated to resist deterioration. Marketing claims continue to swirl around series 300 stainless steel in the evaporative cooling industry. Ductwork metal duct fittings metal duct evaporative. Cooling is provided whilst keeping the evaporative process outside. Design and evaluation of galvanized metal sheets as evaporative cooling pads article pdf available in journal of king saud university 181 january 2005 with 617 reads how we measure reads. Design of new evaporative cooler and usage of different. Evaporative cooling guidelines manual quick reference field guide lesson.
I wont go into the details of what types of molecules these are, but then if you have your water molecules here, water molecules that are sitting on the surface, and im drawing this is kind of a crosssection. The top is usually solid and thatched, with an overhang to deter flying insects not shown in figure 2. This combination provides material that has the mechanical properties of steel enhanced with the corrosion resistance of zinc. Our cross fluted, unequal angle pad design promotes the highly turbulent mixing of air and water for optimum cooling and humidification. Outside air is mixed with hot inside return air for desired supply temperature. In summary, evaporative cooling is the process of removing heat from a surface due to the evaporation of water. Sheet metal fabrication is considered to be a very dangerous job, therefore you should be extremely careful, and follow all safety procedures, in order to avoid injuries, accidents and even fatalities, in some cases. A porous medium is made into thin layers which are arranged in parallel. Evaporative cooling involves supplying 100% fresh air and thereby maintains air quality. 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. Features eedec units are more efficient than conventional evaporative coolers because of the following advanced features. Open loop an open loop system pumps the heated water into a tank at the top of the tower.
Evaporative cooling systems are up to 7 times more economical than such ac systems, and the initial costs are lower. Three different types of evaporative cooling pads were used, namely. Evaporative cooling equipment inspection sheet claim number. Purushothama, in humidification and ventilation management. The bare tube evaporators are made up of copper tubing or. Formability improvement technique for heated sheet metal. The most common and affordable evaporative cooling type, direct coolers pass air directly over or through watersaturated padding, returning cooler, humidified air to the room or house. Evaporative swamp cooler parts, pads, covers and mastercool pads and pumps. This adiabatic cooling process is also used to create the chilled water that feeds our indirect evaporative cooling coil. Ware houses or garages, and it may also be used outofdoors on portico or on work sites. The evaporative cooling module shall be selfcontained. When operating an evaporative cooler, windows are opened part way to allow warm indoor air to escape as it is replaced by cooled air. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in. Performance evaluation of three different types of local.
When warm, dry unsaturated air is pulled through a watersoaked pad, water is evaporated and is absorbed as water vapor into the air. Porous materials for direct and indirect evaporative cooling. The best cooling sheets that will help keep you cool and dry all summer long. Product data sheet coolstream n how it works evaporative cooling is an efficient and effective alternative to conventional air conditioning. Sheet metal and air conditioning contractors national. Furnish proof satisfactory to the owner or his representative, of. A newer type of evaporative cooling, indirect cooling uses a secondary air stream that is pre. During the majority of annual operating hours cooling of data center air is done by transferring heat to the scavenger air stream while passing through a coated aluminum heat exchanger. White rust on galvanized steel introduction galvanized steel has a long history as an effective and economical material of construction for evaporative cooling systems. Its material is chemically impregnated with special compounds to prevent rot and ensure a long service life. The mechanisms of evaporative cooling remain the same, but size and application vary in todays market.
The second type, often called a closedcircuit cooling tower, involves. Apart from personal and portable evaporative coolers, most units are built to cool a room or whole house. 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. Evaporative cooling only works where the humidity is low. A direct evaporative cooling process is shown schematically in fig. Direct evaporative cooling is an adiabatic process where the dry bulb temperature is lowered without changing the amount of heat idec dec dec idec in the air. We carry mobile mastercool pads and cooler pumps and can ship anywhere in the continental united states. As americas evaporative cooling choice for years, mastercool is second to none.
This article describes the design and performance of new alternative noncellulosic evaporative cooling pads made from galvanized metal sheets. The sheet metal and air conditioning contractors national association smacna. Ductwork metal duct fittings elbow 90 degree adjustable. Evaporative cooler engineering specification 598 1. In order for the water to evaporate, the water must absorb heat. Th is cleaning action directs water toward the air entering face of the pad where it is needed most.
1257 927 101 1519 1549 215 377 122 1275 314 751 150 1617 572 577 1230 1569 656 655 259 1596 318 1521 1366 176 321 470 149 1154 155 136 78 59 418 459