Evaporative Air Coolers

Evaporative Air Coolers

The first evaporated pad cooler was demonstrated in the Adams Hotel in downtown Phoenix, USA, in June 20, 1916. Arizona has a hot and dry climate and it seems natural that the modern evaporative cooler was developed in a region with such climatic conditions. If your Hotel, Lodge, B&B or Guesthouse is situated in a region with a hot dry climate (Gauteng, Free State, Eastern and Northern Cape, North West Province and Western Cape), then installing an evaporative cooling system is an eco-friendly and cost effective alternative to conventional air conditioning systems. It is also more energy efficient.

Air conditioners pump refrigerant (which produce emissions) through compression and evaporative cycles to cool interiors. Evaporative cooling systems chill flowing air by evaporating water. Warm exterior air is blown by fan through a dampened pad or heat exchanger. The airstream cools as the moisture from the pad evaporates into it, releasing cool air into the intended area. Key to the performance of the system is cross ventilation which is made possible by open windows and doors or designated ventilators.

What you need to know:

  • Uses around 80-90% less electricity than comparably sized refrigerant-based air-conditioning systems
  • No need to close doors and windows when the evaporative cooler is in use. The cooler operates with cross ventilation exchanging indoor air with natural outdoor air
  • Portable systems are also available
  • Strategically installed Ventilators enhance the performance of the system by regulating the movement of air into and out of your hospitality venue
  • Guest enjoy a healthier alternative to conventional air-conditioning systems
  • Evaporative coolers can generally cover a larger area compared to area covered by a same sized air-conditioner
  • Climate control inside the hotel depends on proper air balance. To limit humidity, you need to make sure that the same volume of air flow exits and enters the intended area. This can be tricky.
  • Installation is generally less expensive than a centralised conventional air-conditioning system
  • The device is also less expensive to operate and maintain than a conventional air-conditioner although regular maintenance is still needed
  • The cooling capacity of the cooler is reduced when the humidity is high. It has no dehumidification. As such it is not suited for regions with a high humidity factor
  • The system relies on clean water, free of mineral deposits or high mineral content – mineral deposits may be left on the pads and the cooled interior if the water has a relatively high mineral content
  • The cooler device must be drained and cleaned periodically
  • The device could sometimes give off a bad odour if filtering foundation (pad) is not adequate or in a state of disrepair.
  • It is possible to run evaporative cooling systems off solar power

 

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