People look for different qualities in beer -- bitter versus fruity, light ales versus dark stouts and even cold versus room temperature. If you like your beer cold and poured from a keg, there are several ways to ensure it stays cold throughout the life of the keg.
Keep kegs on ice
A simple way to keep your beer keg cool is to keep it submerged in ice. Use a large, clean dustbin and layer it with ice. Place your keg inside and add ice around the sides. A standard sized keg might require several kilograms of ice to completely cover it. This will effectively keep your keg cool as long as the ice doesn't melt completely. Regularly check the temperature of your beer and add more ice as needed. Dry ice is an alternative to standard wet ice. Just be aware that you run the risk of your beer freezing with dry ice. Also, dry ice should always be handled with protective gloves.
Use a kegerator
Kegerators are basically fridges designed for kegs. They are available at most major electrical appliance shops and accommodate standard-size kegs. Some are designed to accommodate multiple kegs for setting up different taps and have temperature control devices. You can also convert a working fridge into a keg storage and dispensing unit using a few tools and a carbon dioxide tank
Insulate your keg
A variety of portable keg coolers provide insulation to your cold keg. Keg coolers, also known as keg jackets, are usually made from a standard insulation material like polypropylene. They are designed to prevent a cold keg from warming up due to rising temperatures. Keg coolers come in multiple sizes to fit snugly around standard-size kegs so that no or very little ice is needed. The coolers have an opening on the top for the dispenser. They might also have wheels on the bottom for portability.