Air Conditioning – Evaporative Or Refrigerated?
With warmer weather our thoughts often turn to create a more comfortable environment for living , working and playing. You might just remember the humid, sticky and sleepless nights you endured last summer and said “that’s it, no longer living in an oven!” It’s not that important what led you to this decision, but now you have to make some other choices. For more information, visit their website at Mouritz air conditioning installations
For example, are you going to go for a fully ducted home system, or just a room air conditioner to make the hot nights more bearable? Or maybe you could go for a split system, where two refrigerant lines connect an outdoor unit to an indoor unit. If you own your own house, these are all choices but what if you ‘re renting? Many landlords would not be happy to have you make changes to their building without agreeing to leave the entire facility for the next tenant. Instead, you would probably not be able to pay for an upgrade you can only use for a short period of time.
A portable air-conditioner is the solution to this problem. This article is going to focus on that type of unit. So, what options do you have in portable air conditioners? Well, there are basically two unit types; evaporative, and refrigerated. Let’s glimpse the differences.
The principle of passing air over water is used by the evaporative units. If you were running a fan in a room you ‘d just be blowing hot air around the room. This moving air would marginally cool you down because it removes the heat from the surface of your skin, but in extreme conditions the effect is not significant. Still feeling hot and very uncomfortable. If you blow the air through a wet cloth, some of the heat from the air would be absorbed and evaporated by water. Thus, the air coming out from the other side would be cooler. Essentially this is how an evaporative unit functions. A pump moves water over a pad (wet cloth) from a reservoir tank and one fan blows air through the pad.
It is a concept which is quite simple. There are some drawbacks however. The first is that of performance. At best, you’ll drop the temperature just by a few degrees. Using ice with water can improve this a little. The other negative is that there will be a significant increase in humidity, which will make the room feel ‘sticky.’ You’ll also need to top up the tank over and over again. The benefits are in terms of cost and portability. You can buy one of those units for less than $100 and there are no special requirements for installation. Just fill in with water, plug in and exit the power.
Refrigerated units look identical but their process is very different. They also rely on evaporation but it is a refrigerant evaporation contained within a closed high pressure system. The system consists of a compressor pumping the refrigerant around the system, an evaporator that works similar to a car radiator and the work of the interconnecting pipe. At high pressure, the refrigerant leaves the compressor and is transported to the evaporator facing the inside of your home. The refrigerant in the evaporator is allowed to expand, and in doing so, the temperature will drop. This cooler refrigerant may pass through a bobbin. Air from the room is blown over the coil, and the heat from the air is absorbed through a compressor coil by the refrigerant to be taken back to the compressor. Another fan passes air over the compressor coil to cool down and expel the heated refrigerant to the outside air. This is ducted outwards in a portable device through a window package.