I'm looking a SMALL low flow water pump for an idea

[TheEquineFencer]

When we rebuilt the shop the last time we expanded the footprint a couple of feet and we found a 30-40 foot well with a 2 inch pipe and well point in it. I put a section of 4 -5 inch PVC around where the pipe came out with plans to install another new pipe and point later on. What I'd like to find is a small fairly low flow water pump to pump water out when I get another pipe in to pump water out to a cooling coil I have that came out of a chiller system. I don't want to pull a LOT of water out with something like a 1/2 HP regular water pump. I figure with the ground water at 55*-60* and the air temp like it is now at 100* outside it'll provide some cooling if nothing else it's take some of the humidity out of the air if I leave it running a while. I'm figuring I'll just use it when the air temp is over 80* outside. a 12VDC pump would be OK as later on I'd like to try to get it off grid with a solar or wind system to charge a battery bank. I'm open to ideas.

 

[vekster]

you would have to look at the suction available on a small pump. shallow well pumps could work but you say you dont want a lot of water.
you could bypass unused water back into the well or use it for irrigation.

 

[TheEquineFencer]

you would have to look at the suction available on a small pump. shallow well pumps could work but you say you dont want a lot of water.
you could bypass unused water back into the well or use it for irrigation.

I'd thought about that, but I'll bet running the same water back through the pump will increase the water temp plus that'll be a lot of wasted energy. The water table around here is usually kind of high. I guess what I'd like to find is something like a miniature well water pump or something that I could build to do the samething.

 

[gewf631]

Don't know how big your cooling coil is, but I'd think you would need a lot of surface area to cool enough air to reduce the temperature in your garage by any noticeable amount.
I'm no HVAC tech, but isn't the coolant running into a typical furnace A-frame somewhere around zero degrees (F)?
I don't dispute that running 50-degree water will have some effect, but I would think you'd want something that can handle a lot of water, with a lot of surface area for the air to flow-over.

 

[pseudorealityx]

A couple of issues/questions...

1) Coils don't work well if the flow is very low. You end up with laminar'ish flow, and it won't transfer heat very well.

2) 60 degree water and assume a 10 degree delta T. So you've got the 'average' water temp at 65 degrees. 65 degree coil isn't going to condense much moisture out of the air.

3) Where is the water you pump through the coil going to go?

 

[dlhindiana]

This may not be enough water but what about the pumps in waterfalls or fountains that you use in landscaping?

 

[TheEquineFencer]

A couple of issues/questions...

1) Coils don't work well if the flow is very low. You end up with laminar'ish flow, and it won't transfer heat very well.

2) 60 degree water and assume a 10 degree delta T. So you've got the 'average' water temp at 65 degrees. 65 degree coil isn't going to condense much moisture out of the air.

3) Where is the water you pump through the coil going to go?

I think it's called a "total loss" system, the water is dumped onto the ground, or in my case the ditch right behind the shop and will soak back into the ground. The cooling coils I have are from a 12 ton chiller system, they are rather large, probably 10-20 times the size of a regular "A" coil. Without going up to the shop to measure them, I'd say about 2-1/2 Ft x 5ft and about 4-6 inches thick each.

 

[TheEquineFencer]

This may not be enough water but what about the pumps in waterfalls or fountains that you use in landscaping?

I thought about them, but they do not "lift" water very far. I'd love to have something like a miniature shallow well pump.

 

[pseudorealityx]

I think it's called a "total loss" system, the water is dumped onto the ground, or in my case the ditch right behind the shop and will soak back into the ground. The cooling coils I have are from a 12 ton chiller system, they are rather large, probably 10-20 times the size of a regular "A" coil. Without going up to the shop to measure them, I'd say about 2-1/2 Ft x 5ft and about 4-6 inches thick each.

What kind of fan are you to put behind a 5'x2.5' coil? This thing is going to be 'big' by the time you finish up.

 

[TheEquineFencer]

I'm kinda memory unclear on this but don't they have an air powered pump?
A something wheel.
I should know this, we had one on some dive equipment
A more valve, which I never remember the name of is blocking the name from me right now.

It's not Fulton, but it's something like that.
Once the vacuum is established the air is easily regulated.

Or once the vacuum/prime is established couldn't a variable motor like a tread mill be used to regulate your water gpm?

An innovative idea! I knew there was a reason to ask you guys. I'll keep that idea in mind...

 

[TheEquineFencer]

What kind of fan are you to put behind a 5'x2.5' coil? This thing is going to be 'big' by the time you finish up.

I'm not to that point yet. The fans I was planning on using burned when the shop burned down a couple of years ago. Right now, I have an "assortment" from box fans, pedestal fans to Large 36 inch floor fans.

 

[dmcintosh]

http://www.dannermfg.com/Store/Products/Danner/PID-02512.aspx

We use this style of pump often at work, but rarely use them in a suction application. They work great, are sizes for what you are looking for, but not sure what the suction height would be.

 

[bgarrett]

I dont understand your need, but motorhomes use 12 volt SHURFLOs. I use one to pump out of the creek. Maybe that will help you