Home Page link

Need a thermal switch

Home| Search | About
Login Password
Register Now! Lost Password?

Home Repair - - If it ain't broken, don't fix it. Otherwise look here. 

Bookmark this page:  YahooMyWeb Yahoo!  Google Google  Windows Live Favorites Windows Live  del.icio.us del.icio.us  digg digg  Add to Netscape Netscape
Subject Author Date
Need a thermal switch DanaK 06-24-2006
If you were  Registered and logged in, you could reply and use other advanced thread options
Posted by DanaK on June 24, 2006, 12:06 am

Hi,

I've got a project in mind but I'm having problems finding the right
equipment
for it. I need a thermal switch or thermostat, whichever.
I'd like to set up a
set of water misters to run when the outside
temperature gets to between 90 and
95 degrees. The spray system would
need some kind of thermal switch or
thermostat that was either weather
proof or having a long coil of tubing to the
sensing bulb that would
allow the main switch unit to be out of the weather.
The switch would
then run a solenoid valve, probably something like the 24vac
automatic
sprinkler valves after applying electricity to a 120vac to 24vac
step-down transformer.

The application for this is to provide a precooled air source to my air
conditioner's compressor-condenser coil. Since we're in a hard water
area I was
figuring I'd need to provide some kind of conditioned water
for this system to
prevent the scaling up of the coil. I've seen some
in-line chemical anti-liming
filters for water misters and evaporative
coolers in Lowe's but I was wondering
if the added chemical(s) that
these would provide wouldn't just add to the
problem. The chemical is
supposed to keep the calcium in suspension for
evaporative a/c coolers
as well as these water misters but, in my mind, the
chemicals have to
be deposited somewhere even if the mist is fully evaporated by
the time
it passes through the coils. Would I probably have to install a small
r.o. unit for this? They don't make much water (10gpd usually) but
the misters
don't run all the time and don't use much water when they
do.

All of this does cost a little but the electrical load reduction on
temperatures
from 95 to 105 degrees could be reduced by 23% and
sometimes more from what I
read.

This is just a crazy idea I had one sleepless night while listening to
the
outside compressor run ad nauseum trying in vain to catch up and
not making much
headway. The idea has been patented recently, darn it,
by a person in Plano, TX
but I don't have his/her address to see if they
marketed any kind of kit for
this. Also the concept has been around for
as long as there have been
refrigeration units judging from the patents
referenced in this latest one.

Thanks for anyone's help.
Dana


--
DanaK

Radiant Heat 468x60
Posted by RBM on June 24, 2006, 8:01 am
Look for a greenhouse supply catalog. They have both mister systems and
enclosed and remote bulb line voltage thermostats, used for controlling fans




>
> Hi,
>
> I've got a project in mind but I'm having problems finding the right
> equipment for it. I need a thermal switch or thermostat, whichever.
> I'd like to set up a set of water misters to run when the outside
> temperature gets to between 90 and 95 degrees. The spray system would
> need some kind of thermal switch or thermostat that was either weather
> proof or having a long coil of tubing to the sensing bulb that would
> allow the main switch unit to be out of the weather. The switch would
> then run a solenoid valve, probably something like the 24vac automatic
> sprinkler valves after applying electricity to a 120vac to 24vac
> step-down transformer.
>
> The application for this is to provide a precooled air source to my air
> conditioner's compressor-condenser coil. Since we're in a hard water
> area I was figuring I'd need to provide some kind of conditioned water
> for this system to prevent the scaling up of the coil. I've seen some
> in-line chemical anti-liming filters for water misters and evaporative
> coolers in Lowe's but I was wondering if the added chemical(s) that
> these would provide wouldn't just add to the problem. The chemical is
> supposed to keep the calcium in suspension for evaporative a/c coolers
> as well as these water misters but, in my mind, the chemicals have to
> be deposited somewhere even if the mist is fully evaporated by the time
> it passes through the coils. Would I probably have to install a small
> r.o. unit for this? They don't make much water (10gpd usually) but
> the misters don't run all the time and don't use much water when they
> do.
>
> All of this does cost a little but the electrical load reduction on
> temperatures from 95 to 105 degrees could be reduced by 23% and
> sometimes more from what I read.
>
> This is just a crazy idea I had one sleepless night while listening to
> the outside compressor run ad nauseum trying in vain to catch up and
> not making much headway. The idea has been patented recently, darn it,
> by a person in Plano, TX but I don't have his/her address to see if they
> marketed any kind of kit for this. Also the concept has been around for
> as long as there have been refrigeration units judging from the patents
> referenced in this latest one.
>
> Thanks for anyone's help.
> Dana
>
>
> --
> DanaK



Posted by on June 24, 2006, 8:28 am

>I'd like to set up a set of water misters to run when the outside
>temperature gets to between 90 and 95 degrees...

How about running them when the AC fan runs?

>The switch would then run a solenoid valve, probably something like
>the 24vac automatic sprinkler valves after applying electricity to
>a 120vac to 24vac step-down transformer.

How about 2 120V solenoid valves from a dead washing machine in series?

>The application for this is to provide a precooled air source to my air
>conditioner's compressor-condenser coil. Since we're in a hard water
>area I was figuring I'd need to provide some kind of conditioned water
>for this system to prevent the scaling up of the coil...

That won't help, if the water touches the coil. I save 20% by trickling
rainwater from some tubing with holes over the coil of a window AC.
The water runs down into a plastic drum containing a $10 10 watt
Harbor Freight submersible fountain pump.

>All of this does cost a little but the electrical load reduction on
>temperatures from 95 to 105 degrees could be reduced by 23% and
>sometimes more from what I read.

This works best with low outdoor humidity, although Yogi Gaswami saved
about 20% in central Florida by building an evaporative cooler around
an outdoor coil with standard commercial greenhouse parts.

Nick


Posted by HeatMan on June 24, 2006, 3:56 pm

>
> Hi,
>
> I've got a project in mind but I'm having problems finding the right
> equipment for it. I need a thermal switch or thermostat, whichever.
> I'd like to set up a set of water misters to run when the outside
> temperature gets to between 90 and 95 degrees. The spray system would
> need some kind of thermal switch or thermostat that was either weather
> proof or having a long coil of tubing to the sensing bulb that would
> allow the main switch unit to be out of the weather. The switch would
> then run a solenoid valve, probably something like the 24vac automatic
> sprinkler valves after applying electricity to a 120vac to 24vac
> step-down transformer.
>
You're asking for trouble.

> The application for this is to provide a precooled air source to my air
> conditioner's compressor-condenser coil. Since we're in a hard water
> area I was figuring I'd need to provide some kind of conditioned water
> for this system to prevent the scaling up of the coil. I've seen some
> in-line chemical anti-liming filters for water misters and evaporative
> coolers in Lowe's but I was wondering if the added chemical(s) that
> these would provide wouldn't just add to the problem. The chemical is
> supposed to keep the calcium in suspension for evaporative a/c coolers
> as well as these water misters but, in my mind, the chemicals have to
> be deposited somewhere even if the mist is fully evaporated by the time
> it passes through the coils. Would I probably have to install a small
> r.o. unit for this? They don't make much water (10gpd usually) but
> the misters don't run all the time and don't use much water when they
> do.
>

Even without the hard water, there is a good chance that you will lime up
that condenser with in a season or two. Then, you'll have to buy a new
condenser coil and that can be nearly as much as a condensing unit.

> All of this does cost a little but the electrical load reduction on
> temperatures from 95 to 105 degrees could be reduced by 23% and
> sometimes more from what I read.
>
> This is just a crazy idea I had one sleepless night while listening to
> the outside compressor run ad nauseum trying in vain to catch up and
> not making much headway. The idea has been patented recently, darn it,
> by a person in Plano, TX but I don't have his/her address to see if they
> marketed any kind of kit for this. Also the concept has been around for
> as long as there have been refrigeration units judging from the patents
> referenced in this latest one.
>
There is a place on-line that sells these kits fairly cheaply and they even
mention the need to de-lime the condenser coils regularly.

The best way, IMHO, is to insulate your house and put your straight cool
condensing unit on the north or east side of the house. Keep shrubs,
bushes, and any kind of overhang 36 inches from the sides and 6 to 8 feet
from the top. Pull the curtains on the south and west side of the house to
try to defeat the sunlight from heating up the house any more than it has
to. Get the unit serviced professionally to make sure it's in tip-top
operating efficiency.



Similar ThreadsPosted
Need a thermal switch June 24, 2006, 12:08 am
Thermal Insulation Board February 28, 2006, 4:57 pm
fireplace thermal coupler May 15, 2006, 1:48 am
Questions about thermal windows. October 10, 2006, 5:22 pm
leak in thermal expansion tank October 24, 2005, 6:53 am
How to test a thermal expansion tank? December 13, 2005, 8:20 am
Kenmore dryer thermal cut-off popped again February 8, 2006, 2:00 pm
Hydrokinetix Thermal Storage System October 24, 2007, 10:07 pm
FA: --- AGEMA 510 THERMAL IMAGING CAMERA. VERY NICE - 099 August 5, 2005, 3:10 am
FA: --- AGEMA 510 THERMAL IMAGING CAMERA. VERY NICE - 099 August 5, 2005, 1:11 am

Contact Us | Privacy Policy

XML SitemapXML Sitemap