Comparison between Evaporative Air Cooler and Conventional Air Conditioner
Evaporative Air Cooling
Refrigerated Air Conditioning
|Uses only 10% of the electricity compared with conventional air conditioner.
|Uses large amounts of electrical power because of compressor.
|As temperature rises efficiency of the Evaporative Air Cooler improves.
|As temperature rises efficiency of the air conditioner reduces.
|Cooling capacity is only limited by the air conditions. Up to 50KW of cooling can be achieved with only 1 KW of electricity used
|Cooling is limited by theoretical Coefficient of Performance which means a maximum of 3.5 KW of cooling for 1 KW of electricity consumed.
|Open doors and windows do not affect performance
|Open doors and windows significantly reduce performance.
|Uses no harmful gases for its function. So, Evaporative Air Cooler is Eco-Friendly.
|Uses environmentally harmful gases.
|Avoiding relative humidity below 50% significantly reduces static electricity problems
|Leads to low relative humidity which can create high static electricity conditions.
|Few moving parts – one fan, one pump and three solenoid valves.
|Many moving parts including complex and expensive components such as the compressor.
|Easy and simple to service.
|More difficult and expensive to service.
|Always supplies 100% fresh air.
|Only supplies about 15% fresh air. 85% is re-circulated. It is not fresh.
|Air is cooled only once.
|Air is cooled many times.
|Has no upper limit on temperature.
|High ambient temperatures can lead equipment to shut down due to compressor overload.
|Have bigger fans – pump large amounts of air.
|Smaller fans – pump less air.
|Provides flow of fresh cool air.
|Provides cool, re-circulated, stale air.
|Provides stable relative humidity levels which are more comfortable to work in.
|Can lead to low Relative Humidity which is not comfortable.
|Simple to create positive pressure in buildings giving hygiene and control benefits.
|More difficult to create positive pressure with recirculation systems.
|Operating costs are low.
|Operating costs are typically high.
|An evaporative cooler operates on 240-volt electricity, which means they don’t need special high-voltage circuits.
|Some of the air conditioners require special high-voltage circuits.