Heating and air conditioning - Cooling Tower water usage.

Author

Cooling Tower water usage.

James Storm

2006-02-10, 10:21 pm

I have a customer with 2 large BAC cooling towers. Hooked to them are 2
York 300 ton screws, (2) 200hp screw air compressors and other stuff.
With metered "city" water the sewer bill is calculated by what the water
meter says. This company ran through the main meter in January was
300,000 gals. Metered water to the towers was 260,000 gals. So that
means that 40,000 gals is used for bathrooms and other stuff. Hot dump
to rid some of the minerals from water is metered and also the backwash
for the sand (pool) filter is metered. Both of those meters recorded
only 5,000 gals. That means that cloud plume going into the air is worth
255,000 gals a month. I think the meters will pay for them selves in
sewer bill savings.
--
James Storm
aka Stormy Weather
jstorm@ptd.net

Murdentech

2006-02-11, 10:21 am

Seems there should be some relative calculation for evaporation per 100 tons
or something, somewhere in all that ASHREA data.

Seems like we evaporated about 1 million gallons a year on a couple of 100
ton Trane Centrifugals back in the early '90's.

Sounds about right if your running 600 tons plus over there.

I'd hate to see their sewage bill before meters were installed !! They need
to seek a refund or credit.

Jeff

"James Storm" <jstorm@ptd.net> wrote in message
news:CpqdnUF2taK0onDeUSdV9g@ptd.net...
>I have a customer with 2 large BAC cooling towers. Hooked to them are 2
>York 300 ton screws, (2) 200hp screw air compressors and other stuff. With
>metered "city" water the sewer bill is calculated by what the water meter
>says. This company ran through the main meter in January was 300,000 gals.
>Metered water to the towers was 260,000 gals. So that means that 40,000
>gals is used for bathrooms and other stuff. Hot dump to rid some of the
>minerals from water is metered and also the backwash for the sand (pool)
>filter is metered. Both of those meters recorded only 5,000 gals. That
>means that cloud plume going into the air is worth 255,000 gals a month. I
>think the meters will pay for them selves in sewer bill savings.
> --
> James Storm
> aka Stormy Weather
> jstorm@ptd.net

Rich 1

2006-02-13, 7:21 pm

Stormy,

I would suggest you check with Efficiency Technologies in Tulsa. They
have a computer program that may be of help. It's great at keeping
track of water usage. The amount of water you use in a system is
influenced by a lot of things, tonnage, usage-24/7 etc. But it is also
affected by the quality of the water treatment and the operating
conditions of the chillers themselves.

Rich Goulet
Goulet Associates, Inc.
Naperville, IL

James Storm wrote:
> I have a customer with 2 large BAC cooling towers. Hooked to them are 2
> York 300 ton screws, (2) 200hp screw air compressors and other stuff.
> With metered "city" water the sewer bill is calculated by what the water
> meter says. This company ran through the main meter in January was
> 300,000 gals. Metered water to the towers was 260,000 gals. So that
> means that 40,000 gals is used for bathrooms and other stuff. Hot dump
> to rid some of the minerals from water is metered and also the backwash
> for the sand (pool) filter is metered. Both of those meters recorded
> only 5,000 gals. That means that cloud plume going into the air is worth
> 255,000 gals a month. I think the meters will pay for them selves in
> sewer bill savings.
> --
> James Storm
> aka Stormy Weather
> jstorm@ptd.net

.p.jm@see_my_sig_for_address.com

2006-02-13, 7:21 pm

I wonder if there's a nifty controller out there to monitor the actual
quality of the exhaust plume, in order to control fan speed for
maximum vaporization ? All the water that leaves as water droplets
instead of vapor is largely wasted ......

On 13 Feb 2006 14:45:46 -0800, "Rich 1" <rgoulet@wideopenwest.com>
wrote:
[color=darkred]
>Stormy,
>
>I would suggest you check with Efficiency Technologies in Tulsa. They
>have a computer program that may be of help. It's great at keeping
>track of water usage. The amount of water you use in a system is
>influenced by a lot of things, tonnage, usage-24/7 etc. But it is also
>affected by the quality of the water treatment and the operating
>conditions of the chillers themselves.
>
>Rich Goulet
>Goulet Associates, Inc.
>Naperville, IL
>
>James Storm wrote:

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James Storm

2006-02-13, 10:21 pm

Rich 1 wrote:
> Stormy,
>
> I would suggest you check with Efficiency Technologies in Tulsa. They
> have a computer program that may be of help. It's great at keeping
> track of water usage. The amount of water you use in a system is
> influenced by a lot of things, tonnage, usage-24/7 etc. But it is also
> affected by the quality of the water treatment and the operating
> conditions of the chillers themselves.
>
> Rich Goulet
> Goulet Associates, Inc.
> Naperville, IL
>
> James Storm wrote:
>
>
>
The towers are just over a year old. Nice control system with VFD drives
via temperature control. The belts are four together under a common
back. First time for me to see one. Vibration sensor to shut them down
when all hell breaks loose.
The simple math for the latent heat of vaporization equals 219 tons per
hr. One chiller runs 24/7 (manually rotate) at 65 to 75% with 2 air
compressors getting their air and oil cooled.

I think things are going well but never took the time or had the
equipment to find the water usage.
Now I know and as they say YMMV.

--
James Storm
aka Stormy Weather
jstorm@ptd.net

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