Different types of Air conditioning...Help???
Jun 16th 2005, 6:31 pm
#16
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Joined: Nov 2004
Location: Nuevo Mexico
Posts: 4,452
Re: Different types of Air conditioning...Help???
Funny. Just ran across this thread. AC versus evaporative (a.k.a. swamp cooler) is one of the eternal arguments here in New Mexico. Up here in Santa Fe (~5 - 40% humidity, ~75 to 95 F summer) we usually use swamp coolers because they are dirt cheap to run. Down in Albuquerque, 5 to 10 F warmer it's a mix of the two - a lot of people complain swamp coolers don't go cold enough.
Jun 16th 2005, 9:39 pm
#17
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Joined: Mar 2003
Posts: 4,432
Re: Different types of Air conditioning...Help???
Originally Posted by steve99
We use our evaporative in the summer, normally just in the evenings and for an hour or so as were going to sleep, probably only 20 or 30 times during the summer. We're right on the coast so dont have any humidity issues.
For the little we're inside in the summer it doesnt warrent using the reverse cycle, we swop over in the winter and run this as it heats the main lounge up very quickly.
You say the reverse cycle is very efficient to use in heat mode, any ideas what it costs to run? we've had our on every night for the past week or so for 3 or 4 hrs and we're worried we're gonna end up with a huge electricity bill.
On the compressor unit its says heating capacity 9300 W(A) and heating input is 3000 W
How do you convert that into $'s
steve
For the little we're inside in the summer it doesnt warrent using the reverse cycle, we swop over in the winter and run this as it heats the main lounge up very quickly.
You say the reverse cycle is very efficient to use in heat mode, any ideas what it costs to run? we've had our on every night for the past week or so for 3 or 4 hrs and we're worried we're gonna end up with a huge electricity bill.
On the compressor unit its says heating capacity 9300 W(A) and heating input is 3000 W
How do you convert that into $'s
steve
Cost = Cost_per_unit_Power * Power * Time.
$ = $/kWh * kW * h
$ = dollars.
$/kWh = $0.10 (check your electricity invoice).
kW = 3,000 Watts = 3 kW.
h = 4 hours.
Cost = $0.10 * 3 kW * 4 h = $1.20
Note quite correct.
Multiply cost by commpressor duty cycle - the fraction of the time the compressor is working.
Even that needs qualification - some compressors work at different rates depending on the heat load - that is that are not either on or off.
Last edited by Megalania; Jun 16th 2005 at 9:49 pm.
