Enhance your cooling system with our solutions, which are based on the evaporative cooling and free cooling principles and reduce your energy consumption as well. The technology can be applied in numerous applications, including data centers, factories, livestock and greenhouses. Direct and indirect evaporative cooling using the evaporative process to precool the supply air stream can reduce the energy consumption of. 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.
Air is pulled across a thoroughly wetted medium as evenly as possible. To evaporate 1kg of water into an atmosphere, 680w of energy is required. The direct evaporative freecooling unit features integrated liebert icom unit controls to maximize data center protection, efficiency and insight. Evaporative cooling is the most energy efficient and cost effective form of cooling that exists. Evaporative cooling and free cooling vertiv cooling systems.
Direct evaporative cooling and ventilation technologies. In indirect evaporative cooling stage, the evaporation of water takes place in the air entering the side of an air cooled unit condenser, causing warm outside air to be cooled through an adiabatic cooling. Equipment cost is lower than a refrigeration system, installation is simple and inexpensive, and operating costs. You can duplicate the principle behind direct evaporative cooling by wrapping a wet. 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. Please refer to our industry and product pages for more information on how munters evaporative cooling technologies can provide reliable, cost. Indirect direct evaporative cooling animation duration. Indirect evaporative cooling can be used to lower both the dry bulb and wet bulb temperatures. Our welldesigned industrial and commercial quality evaporative cooler can reduce the. Indirect evaporative cooler westaire engineering inc.
Costway evaporative cooler, 4in1 cooling, fan, humidifier and anion, with 3 wind modes, 3 speeds, 6. Direct and indirect evaporative cooling pdf free download. Pdf the main objective of this research is to optimize the parameters. Evaporative cooling is one of the oldest and simplest methods for cooling air. Free cooling concepts for data centers nortek air solutions. Indirectdirect evaporative cooling system the care and attention which any piece of equipment needs and deserves. For a direct evaporative cooling process, the wet bulb efficiency is insensitive to. An experimental investigation of the performance of a directindirect evaporative cooling fresh air handling unit with different modes of operation is presented. Cooling and hvac units typically use evaporative cooling through either counterflow or crossflow systems, this can be further broken down to direct and indirect evaporative cooling.
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. Artic air ultra provides 20% more cooling power artic air ultra provides 20% more cooling power over the standard arctic air unit. As data center operators around the world seek to improve their overall pue rating many are turning to energy efficient methods of cooling. Direct evaporative coolers use a fan to pull outside air through media pads that are. Evaporative cooling systems for new homes southwest energy. Reports produced after january 1, 1996, are generally available free via the u. Evaporative cooler an overview sciencedirect topics. What are the benefits and disadvantages of indirect. The technology can be applied in numerous applications, including data centers. Cooling technologies for improved vegetable storage in mali evaluation pdf.
Performance of direct evaporative cooling system under egyptian. One of the most strategic ways for data centers to. Evaporative coolers can be employed as a compact and often the sole cooling system in a home. Evaporative precooling system blue energy technologies. Two stage evaporative air cooler manufacturers saudi arabia. Purushothama, in humidification and ventilation management. Direct evaporative cooler westaire engineering inc. For steam humidifiers, this energy typically comes from the electricity or gas being used to boil the water.
The best results so far in evaporative cooling have been achieved through this method. The latter can provide years of troublefree service and cool, clean. Direct evaporative turbine inlet cooling tic provides a costeffective, energyefficient, and environmentally beneficial means to enhance power generation capacity and efficiency of. You can duplicate the principle behind direct evaporative cooling by wrapping a wet handkerchief around your neck on a hot day and standing in front of a fan. Direct and indirect evaporative cooling are extremely energy efficient, negating the need for compressors in the cooling cycle. For steam humidifiers, this energy typically comes from the electricity or gas. An indirectdirect evaporative cooling system for cooling air for comfort purposes includes a single, variable speed blower positioned below an indirect evaporative cooling stage and a direct evaporative. A direct evaporative cooling system is the simplest and most popular evaporative cooling system available. Indirect evaporative cooling uses a heat exchanger to avoid this contact. It is the customers and installation personnel responsibility to determine if the unit is. When warm, dry unsaturated air is pulled through a watersoaked pad, water is evaporated and is absorbed as water vapor into the air. Evaporative cooling eers in excess of 100 may be achieved.
A simplified cooling efficiency correlation is proposed based on. Pdf calculations of the outlet air conditions in the. Pdf performance of direct evaporative cooling system under. This method comprises two stages as you can guess from the name of the process. Its so simple to set up and use just pour water in the tank, plug it in and. The effectiveness of each method depends on the extent to which. Direct evaporative precooling model and analysis info oak. In many plastic transformation processes, the required. Evaporative cooling differs from typical air conditioning. Evaporative cooling an overview sciencedirect topics. Evaporative cooling design guidelines ced engineering. A 2stage evaporative cooling system aka indirectdirect cooling represents the most advanced cooling system utilizing evaporative cooling technology.
It takes heat energy to change the water or any liquid from a liquid into a vapor. Review on evaporative cooling systems semantic scholar. This evaporative cooling design guidelines manual for new mexico schools and. Evaporative cooling differs from typical air conditioning systems, which use. Evaporative cooling is the process in which the evaporation of water removes heat from a system. This section describes the evaporative coolers models for hvac in energyplus. A general recommendation for applying direct evaporative cooling is to. Direct and indirect evaporative cooling strategies. Indirect direct evaporative cooling air coolers hybrid. Cooling is provided whilst keeping the evaporative.
In direct evaporative air cooling machines, the heat exchange process is enabled by means of a water pump that delivers water to cooling pads and a motor driven. They can also be used in combination with a regular air conditioner system. Lower speeds give more exposure time to the wetted media, thereby achieving more cooling. The heat and mass transfer between air and water film in the direct evaporative cooler is theoretically analyzed in present paper. The effectiveness of an ieac section alone will range from 60% to 78% depending on the configuration and the air speed past the heat exchanger see. There are different kinds of evaporative cooling systems. Best practice, direct evaporative cooling technology for. By incorporating in our direct evaporative cooler with our indirect evaporative cooler you get the best of both worlds.
Its advanced controls prevent over cooling and under cooling by selfoptimizing thermal system operations using machinetomachine communications and advanced algorithms. For watercooled, selfcontained directexpansion dx systems like floorbyfloor systems, a precooling coil upstream of the refrigerant coil is supplied with cold water. Improvements to cooling systems are one of the most effective ways to increase your bottom line and meet sustainability goals. Direct inlet fogging is a type of evaporative cooling method where demineralized water is converted into a fog by means of hp. 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.
Aztec indirect and indirectdirect evaporative cooling. Us5664433a indirect and direct evaporative cooling. Single stage direct evaporative coolers are typically small in size as it only consists of the membrane, water pump, and centrifugal fan. Direct evaporative systems cool and humidify outside air and blow it inside a home. Adding a direct evaporative stage to the indirect cooling process causes further reduction in drybulb temperature. For indirect or direct evaporative coolers, specify the indirect and direct portions as two separate devices. Nonetheless, since free ridership was much lower than projected, the evaporative cooler. Can provide free cooling even if there is no building return air.
Course contents evaporative coolers, often called swamp coolers, are cooling systems that use only water and a blower to circulate air. Customers can achieve leed points and can get utility rebates. 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. Pdf experimental analysis of mist injection and water. Evaporative cooling design guidelines cedengineering.