Wednesday, March 5, 2008
People generally use misting fans for outdoor cooling in their gardens, patios and garages of their homes as well as other commercial establishments like restaurants, fairs, hospitality tents, amusement parks, sports arenas etc.
Misting cooling systems invariably work on the evaporation technique to produce ultra fine mist that relieves the environment of the heat stress. When the water droplets are released into the hot air, they absorb the heat present in the air and get released as vapor. The change of liquid to gas creates a cooling effect known as evaporative cooling. Misting fans can be used outdoors and in areas where the use of air conditioners is not feasible.
Most cooling fans are easy to install, environment-friendly and inexpensive to maintain. Many misting fans strangely consume negligible quantities of water to produce maximum cooling effect. The cooling fans are of various types - high, medium and low pressures.
High pressure fans produce greater cooling effect which is more suitable for more expansive open spaces. High pressure system are generally operated at 800 pounds of pressure or more and are also the most expensive to purchase as the components used must be sturdy enough to endure such high pressure.
Mid pressure misting fans come in a wide variety of options for use at commercial and residential areas. Medium pressure systems are quite often the choice of homeowners because they are efficient and yet not cost prohibitive. These systems typically operate at 100 to 200 pounds of water pressure.
Low pressure misting systems can operate on the normal domestic water supply pressure. They are the least expensive type of system and their effectiveness is understandably limited. Furthermore, because of the lower water pressure, there is a possibility of a higher frequency of clogging necessitating greater maintenance.
The temperature reduction - whatever the type of misting system - largely depends on the humidity levels of the area to be cooled. The effect of fan is more needed in places with high humidity. The flexibility of portable fans allow users to place it in different areas where needed. A properly installed, quality mist system allows you to enjoy your open areas even on hottest days.
Any reputable mist cooling company should be able to offer you all three types of misting systems, low, medium, and high pressure, and should also guide you decide which works best for your particular application.
Make it a point to select a licensed company that has been in the business of cooling systems for a long time. If you are purchasing online, you should verify that they list their full contact details with addresses, phone numbers, warranty instructions and customer support. There are many companies who don't even list these details so be cautious. You must also be sure they offer all replacement parts are easily available to contact for help after the sale.
A basic mist cooling system will consist of an inline filter, tubing and nozzles. Always look for metal fittings and brass nozzles and avoid plastic components as metal is known to endure better in the extreme hot climate. As most systems are small, they will not in any way spoil the aesthetics of your exteriors.
Read more: http://www.articlesbase.com/gardening-articles/keep-your-place-cool-with-a-misting-cooling-system-1848790.html
Sunday, March 4, 2007
Mist Cooling Systemsare popular in dry, hot areas, where evaporative cooling works best. These misting systems are found around patios and swimming pools, as well as many public areas. They work by spraying a fine mist of water into the air, which then quickly evaporates, making the air seem cooler. It can be compared to walking through a light fog, with similar cooling characteristics. Mist direction depends on how the nozzles are positioned, which is a matter of personal preference. Depending on the desired coverage area, this project should only take a day or two.
Things You'll Need:
Vinyl tubing, 1/4 inch in diameter
"T" shaped vinyl tubing connectors
Plastic wire staples
Connector, hose faucet to tubing
Instructions to Make a MIST COOLING SYSTEMS
1. Measure the area where the mist system will be located. For instance, if the hose faucet is to the side of the patio, measure from the faucet to the patio cover support, up the support and across the edge of the patio awning. The mist system can also run along the sides of the patio awning, if desired. This is the amount of vinyl tubing needed, plus 3 feet, just in case.
2. Wrap the threads of the outdoor faucet with Teflon tape and screw on the hose to tubing connector. Insert the tubing end into the vinyl tubing into the connector. It will be a tight fit since it is a pressure fitting; the tightness of the fit keeps it in place.
3. Connect the tubing to the patio supports or to the house, using the hammer and the plastic wire staples. Do this loosely at first, just enough to keep the tubing in place. This way, you an adjust the tubing as necessary. These plastic wire staples will hold the tubing in place without crushing it.
4. Determine where mist heads are needed. This is a personal preference. You can install mist heads from every foot to three feet apart and still be effective. Do not have a mist head spraying directly into a window or on a painted wooden surface, as water damage could occur.
5. Cut the line every place a mist head is desired with scissors. Cut the excess off the end, but keep it nearby. Place the "T" connections into these cuts. Cut about an inch of tubing from the excess, and place on end onto the "T." Repeat until all the "T"s have tubing on them. The end cut of the tubing is where the last mist head will go. There is no need for a "T" here.
6. Place the mist head into the tubing that is attached to the "T"s. Place a mist head at the end of the tubing. Turn on the water and check for leaks, as well as any mist heads that are not working. If some of the heads are not working, just replace them.
Image credit : Mist Cooling Systems Malaysia
Saturday, March 4, 2006
How To Use Patio Misting Systems: Mist Cooling Systems for PatiosWe have all seen those cheap patio misters they sell at the big box stores. For $29.00 you basically get a mini-spinkler system that connects to your garden hose and sprays small droplets of water on you and your guests. Of course you are a little bit cooler, but do you really want to be soaking wet at a barbecue? On those hot days, there's no doubt that having cooling systems outside sounds like a good idea. However, put down the cheap misting system and check out patio misting systems that really work. Here's how to cool off your patio with patio misting systems.
- Choose a high pressure patio misting system. It really is all in the pressure. With a higher pressure misting system, the nozzles can be pinched down tighter, producing a micro-fine mist that just floats in the air, more like fog. The cooling effect comes not from getting everyone wet, but from the evaporation of the mist into the air. Evaporation is a chemical process that actually uses heat from the air. With millions of tiny droplets evaporating in the air, serious cooling is the result of these patio misters. Choose a pump that can produce 1000 psi or more to achieve full evaporation.
- Hang the misting lines at the appropriate height. Depending on the typical humidity level in your area, lines may need to be installed a couple of feet higher to get the full evaporation and avoid wetting. Another option is to use smaller nozzles and simply use more of them.
- Choose the right nozzle spacing. Most mist system sources will offer lines in 24, 30, or 36 inch spacing. The closer you position the nozzles, the more cooling you will get. But if it is too much, or if it is too humid in your area, you may see some wetting. Follow the advice of a good misting system website or salesman, and don't be afraid to ask a lot of questions. See the following link to the same site where I got my Patio misting system. They have a very cool "Build-It Yourself" tool where you can type in your own temperature, humidity, height of install, etc. and see what the recommended specifications are. Other sites probably have something similar.
- Choose the right nozzles. Again, seek advice, but larger nozzles cool better, as they produce more mist. But take it too far and you'll get wetting down below.
- Filter your water if necessary. If your water contains calcium or other particles, install an inline filter right after the pump to be sure your misting nozzles don't clog. Cleaning nozzles isn't that tough, but it is time consuming. A $50 filter should take care of it though.
Now you know what to look for in these patio cooling systems. Basically, get yourself a quality system and make sure to get some help with the design first. A well designed misting system can be an amazing addition to any backyard or patio. A cheap one or a badly designed one can be a nightmare for your party guests!