A portable evaporative air cooler, or swamp cooler, is a great alternative for inexpensive cooling. These are both less expensive to purchase and less expensive to run compared to a portable ac unit. Also, the mechanism small cooler is much less complex than an ac unit, so it will require less maintenance and upkeep.
An evaporative air cooler operates on the principle of an endothermic reaction. An endothermic reaction is a process that absorbs energy in the form of heat. The evaporative air cooler passes air by using a wet media (wick). As the air passes through the water in the wick evaporates and the reaction causes heat in the air to be absorbed.
This may not be so simple to understand, but the process is one that we experience every time we sweat. On a hot day, sweat evaporates off from your skin causing the same endothermic reaction as an evaporative air cooler does. Another example is having to leave a swimming pool on a breezy and hot day. Even though the temperature may be over one hundred degrees, the water rapidly evaporating off from your body could make you feel chilled or cold. A traditional ac unit uses a liquid like Freon to absorb heat. It then dumps heat outside the area being cooled through ventilation. An evaporative air cooler instead cools the air utilize the endothermic reaction described.
Evaporative air coolers are better suited for dry climates. More water can be evaporated in dry air than in humid air, making these much more effective when humidity is low. Also, unlike when using a traditional ac unit, the area being cooled should not be sealed up. The area should be ventilated so the humid air produced by the cooler can be carried away and replaced by drier air.
Since a swamp cooler consumes water, a sufficient water reservoir size should be considered. The rate at which an evaporative air cooler consumes water is around half a liter an hour depending on the humidity level, so a six to ten liter reservoir is recommended. An evaporative air cooler should have an air flow of at least 500 cubic meters per hour. Brands, such as the SPT evaporative air cooler cooler may offer other features this ionizer or ice features. These additional features increase cost, but prices for a portable evaporative air cooler is always a lesser amount than an equivalent portable ac unit. Plus, they are cheaper to run and.