Browse Forums Heating, Cooling & Insulation Re: Evaporative Cooling - is it worth having? 10Dec 13, 2007 11:50 am Lets hope one of those airconditioning "discussions" doesnt break out here!
In our new place we have had a couple of 30 deg+ days so far and most of the house has stayed nice and cool with no need for air-conditioning except maybe for the master bedroom which faces the afternoon sun.... ...which couldnt really be avoided as all our living areas have the "perfect" northerly orientation! (and eaves which shade the windows beautifully!) We have the ducted refridgerated air ready to go....but if we only need it 10 times are year then will be very happy - sooooo worth it on a 40 degree day to walk into that COLD air Built Porter Davis "Dromana" 2007. Re: Evaporative Cooling - is it worth having? 11Dec 13, 2007 12:15 pm hmmmm
no eaves!!! all the bedrooms upstairs with a northerly aspect! Refridgerated ducted air con is a must.... Cost to run? Who cares as long as I am comfortable.. Re: Evaporative Cooling - is it worth having? 12Dec 13, 2007 12:38 pm I had reason (work wise) to visit the design & assembly people from this place:
http://www.airchange.com.au/ach/products.asp?id=3 They make evaporative coolers that actually work as a heat exchanger - and don't introduce extra moisture into the air - all the evaporation is done 'outside' and the air is circulated through a cooled coil/membrane. The result is very little use of water (a lot of it is recycled around in the unit - somewhat like a cooling tower) and the air is not made any more moist than it is, nor is it dried out. The power aspect is the biggest thing. They consume something like 5-10% of an equivalent refrigerated aircon unit, so in older buildings & schools built with 'just enough' capacity in the switchboard, they can install up to 10 of these where they could previously only install 1 a/c unit due to power capacity. Dunno if they do homes, or strictly government & commercial work, but I reckon it's a great concept that makes evaporative cooling more desireable - as it loses the biggest negative with evap cooling - the moisture laden air. Re: Evaporative Cooling - is it worth having? 13Dec 13, 2007 1:31 pm commodorenut,
Looking at their site, they seem to be making ventilation units that preserve current internal air temp. Given that most refrigerated splits don't ventilate, I think that this would be much use in that environment. Re: Evaporative Cooling - is it worth having? 14Dec 13, 2007 2:29 pm how efficient is this evap cooler? like how much to run /hour? how much water used/hour?
i did try to googled it, but found no answer so far Re: Evaporative Cooling - is it worth having? 15Dec 13, 2007 2:49 pm I don't know all that much about it, as I was there solely to look at a small part that goes into them, but they had one running, and it was a cool breeze coming from it. They did briefly explain the process though.
There were 2 methods they showed me: 1. They basically bring in exterior air, pass it through a heat exchanger too cool it, then it enters the room. The interior air exhausted out through another heat exchanger - making the most use of the cooler interior air, rather than hot exterior air, and their is also evaporation occurring outside (to aid cooling). 2. They recirculated interior air through the heat exchanger & back into the room - further cooling it. Imagine a very thin waterproof membrane - water on the outside of it is evaporating (outside) while air passing on the opposite side of the membrane is cooled by that evaporation process - the air stays seperate to the water. Now imagine 100 of these sandwiched together in a block, with a large volume of air passing through the internal air's "dry" side, and a volume of water & air passing through the external 'wet' side. I don't know a whole lot about water consumption, but it was in the vicinity of a few litres per hour on one of the ones he showed me. Re: Evaporative Cooling - is it worth having? 16Dec 13, 2007 7:31 pm Interesting device CDN. Thanks for sharing it.
I'm still getting my head around it's cooling capacity v energy and it's good to see another approach. From the web site they seem to be geared towards the commercial space and changing air more so - versus pure cooling/heating . Is that correct? Steve Re: Evaporative Cooling - is it worth having? 19Dec 16, 2007 8:01 am Steve, if flew is building with H3nley, then they will be getting a 5 star rated Brivis ducted heating unit. It is standard in their houses. Re: Evaporative Cooling - is it worth having? 20Nov 01, 2008 9:10 am flew Hi There We were trying to cut down on the cost of our new house and my husband thinks the cooling might not be that good and that we could put in a wall mounted air conditioner later. Is Evaporative cooling worth having? Is it better than the wall mounted ones We have one: Pros - use much less electricity, fresh air constantly drawn in, maintains air humidity Cons - not so good in humid weather, can use a lot of water (check manufacturer's specs, can't do heating like RCAC, needs to be serviced and shut down annually (DIY or pay ~$100) In fairness nobody gave a crap about the ACCC and the gag clauses continued in the pro forma templates of a few other builders after the ACCC took on Wisdom, and more… 19 75496 Hi I am wanting some opinions about the build of a steel shed I am going to get one about 4.5 x 2.5 m steel shed and the height will be about 2.3-2.4m high The one I am… 0 15169 |