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re: how to cool water temps without a chiller?
Posted on 7/3/23 at 9:50 pm to LSUTIGERTAILG8ER
Posted on 7/3/23 at 9:50 pm to LSUTIGERTAILG8ER
quote:
Return Jet fountain sprayer/aerater thing.
I have 2 of them on my 10k Gallon pool. Last summer they worked great. I set my pool to run about 3 hours at night, the coolest part of the day, from about 2-5am. It kept the overall pool temp at 88-90 degrees most of the summer, which isn't bad.
This summer, though, it is so damn hot that even running them at night is not cooling it off.
1
Posted on 7/4/23 at 9:56 am to Buck Dancer
Interesting, so these pool chillers are basically just condensing units for an AC. They just run the pool water through an air cooled radiator basically?
Posted on 7/4/23 at 10:18 am to tide06
quote:
Pool waterfalls/fountain/sprayers
I’d try this before anything. Buddy uses em and it keeps his in mid 80’s
Posted on 7/4/23 at 11:41 am to Buck Dancer
quote:
Is this the heater/ chiller you have? How do you like it? May be interested in a heater/chiller.
Thats the one i just got installed two weeks ago.
Rheem owns Raypak. They’re a big AC manufacturer.
This post was edited on 7/4/23 at 1:55 pm
Posted on 7/4/23 at 1:48 pm to LSUTIGERTAILG8ER
Here is the redneck version of a chiller…..take your lawn sprinkler and aim it at the pool before and during swimming. Refreshing
Posted on 7/4/23 at 7:47 pm to LSUTIGERTAILG8ER
I made my own aerators out of PVC pipe. They stuck out of the water about 18” with a horizontal slit about every 1”. I set my pump to run from the time the temp dropped below my water temp to the time the temp got equal to my pool temp. (Just look at the forecast on your phone)
Do not run it during the day. Depending on the humidity you may actually be warming your water.
This knocked a couple degrees per night out of my water until it got to 87 or 88. Then it was steady.
Do not run it during the day. Depending on the humidity you may actually be warming your water.
This knocked a couple degrees per night out of my water until it got to 87 or 88. Then it was steady.
Posted on 7/8/23 at 11:47 am to jamiegla1
I beg to differ sir. Last Friday night my water was 93°. Saturday I went to Splash and picked up a couple of those PVC things that attach to the pool return. White with some blue and yellow flower looking thing on the end. Cut the blue plastic leaf looking thing off and painted them gray. Ran it for a few days, works great. My engineer buddy explained the concept of latent heat of vaporization. If the air temperature at night drops low enough, and you can turn your pool pump RPMs high enough to get a good spray, they do work. This morning pool temperature was 85°.
By the way, I had called the pool guy and he quoted me $3300 for a chiller. Two of those spray things from Splash were $70…
By the way, I had called the pool guy and he quoted me $3300 for a chiller. Two of those spray things from Splash were $70…
Posted on 7/8/23 at 6:42 pm to rlp
That company doesn’t expect to have any customers that are thrifty chemical engineers.
Please someone check my math… For the Raypak linked above … according to its specs, it puts out 100k btu/hr, so would need to run 25 hours at its rated 5kw to cool 30kgals of water 10 degrees. At $0.08/kWh, that’s a little over $10. I assume some heat is lost to the dirt the pool sits in, too, so call it $15. Doesn’t seem too bad, if it’s built to last.
Disclaimer, I’m a few cold pops in and didn’t let my operator buddy check this, so it’s probably all wrong.
Please someone check my math… For the Raypak linked above … according to its specs, it puts out 100k btu/hr, so would need to run 25 hours at its rated 5kw to cool 30kgals of water 10 degrees. At $0.08/kWh, that’s a little over $10. I assume some heat is lost to the dirt the pool sits in, too, so call it $15. Doesn’t seem too bad, if it’s built to last.
Disclaimer, I’m a few cold pops in and didn’t let my operator buddy check this, so it’s probably all wrong.
This post was edited on 7/8/23 at 7:25 pm
Posted on 7/10/23 at 12:15 pm to tide06
quote:
Pool waterfalls/fountain/sprayers
If anyone around Lafayette wants to try one, I have one that they won't let me return. It didn't fit my jet.
Posted on 7/10/23 at 6:34 pm to turkish
quote:
Please someone check my math… For the Raypak linked above … according to its specs, it puts out 100k btu/hr, so would need to run 25 hours at its rated 5kw to cool 30kgals of water 10 degrees. At $0.08/kWh, that’s a little over $10. I assume some heat is lost to the dirt the pool sits in, too, so call it $15. Doesn’t seem too bad, if it’s built to last.
No comment in the math, but once my Raypak got the water down to 88 degrees, i’ve been tracking it and it runs for 1 -2 hours a day to maintain the 88 degrees in full sun/ hot days. If it’s cloudy or rainy, it runs noticeably less to maintain the 88 degrees.
Posted on 7/10/23 at 7:03 pm to TDTOM
quote:
If anyone around Lafayette wants to try one, I have one that they won't let me return. It didn't fit my jet.
It might fit your jet, there is probably a nipple or other fitting that you need to pull out of your jet first. On mine, there are 2 grooves on the inside of the fitting that they make a little wrench for, looks like a plastic card.
tool
This post was edited on 7/10/23 at 7:04 pm
Posted on 7/10/23 at 7:10 pm to indytiger
quote:
It might fit your jet, there is probably a nipple or other fitting that you need to pull out of your jet first. On mine, there are 2 grooves on the inside of the fitting that they make a little wrench for, looks like a plastic card.
No, I don't have threads on the inside of the jet. Therefore, there is nothing for the fountain to screw into.
Posted on 7/11/23 at 12:00 pm to indytiger
quote:I had the same thing. I used some needle noses opened wide and got it out while floating on a floatie in the pool .
On mine, there are 2 grooves on the inside of the fitting that they make a little wrench for, looks like a plastic card.
Posted on 7/16/23 at 11:52 am to lsu1987
quote:
My engineer buddy explained the concept of latent heat of vaporization
hes right about latent heat of vaporization. Of course, thats what the intention of these things are. Can you ask him about droplet size and its effect on mass transfer? Thats essentially what youre doing. You need to transfer mass from the liquid to vapor phase and return that cooler liquid back to the pool. He could go take a look at an industrial cooling tower and then compare that to the 4 little things on your pool.
Let's not forget that by installing these annoying little sprayers, youre also removing the ability of those nozzles to circulate your pool. The only way they can achieve a small droplet size is by severely restricting the flow and increasing pressure at the orifice inlet.
An 8 degree drop in one night is astonishing, to be honest. I have questions. But I also know that if something works, they why not do it. Im just saying that when I tried it, the cost of a lack of circulation and the annoyance of an array of sprinklers in my pool was not worth the 1 degree improvement I saw
Posted on 7/16/23 at 12:15 pm to jamiegla1
The sun sets in my backyard thus my pool is quite warm. I'm either going to have to invest in a chiller or rig up a shade. We're just not getting the normal rain patterns that we're use to.
Posted on 7/17/23 at 9:19 am to LSUlefty
quote:
The sun sets in my backyard thus my pool is quite warm. I'm either going to have to invest in a chiller or rig up a shade. We're just not getting the normal rain patterns that we're use to.
This is my problem as well. My backyard (and thus pool) faces northwest, so it gets the brunt of the sun from about 9am until around 7pm. No shade whatsoever, so these nearly 100 degree days with no rain or cloud cover to break it up make my little PVC sprayer nearly useless. Plus, the low at night isn't even getting below 80, so even running it all night doesn't do much.
Posted on 7/17/23 at 9:28 am to BMoney
quote:
My backyard (and thus pool) faces northwest, so it gets the brunt of the sun from about 9am until around 7pm.
Same.
Posted on 7/17/23 at 10:24 am to tigerskin
quote:
Here is the redneck version of a chiller…..take your lawn sprinkler and aim it at the pool before and during swimming. Refreshing
What I've been doing this year, is replacing water every weekend. I use a siphon hose and drain the pool down about 6" to 12" every Friday. I know its not exact, but it does seem like placing the siphon near the surface takes the hottest water at the top out. Then I refill the pool from tap, which is about 83-84 deg. Combined with night time fountains, it helps my tiny pool stay around 88 degrees for the weekend. I use the old finger-over-hose siphon trick so draining doesn't use power. Water in Baton Rouge is cheap, about $1 every time I do this. Replacing the water every week requires a negligible amount more in chemicals.
Posted on 7/17/23 at 10:43 am to AutoYes_Clown
Update...
I simply changed the timer on the pool to run overnight from 6:45pm to 6:45am
(unless we are in the pool during the day) and my temps have been 87-88 in the mornings as oppposed to prior 91-92 deg.
Its been enough of a difference to notice when using the pool for sure.
Heavy rain downpour yesterday eve and overnight and this am pool water temp was 86.
Ill take it.
I simply changed the timer on the pool to run overnight from 6:45pm to 6:45am
(unless we are in the pool during the day) and my temps have been 87-88 in the mornings as oppposed to prior 91-92 deg.
Its been enough of a difference to notice when using the pool for sure.
Heavy rain downpour yesterday eve and overnight and this am pool water temp was 86.
Ill take it.
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