Plate Heat Exchanger and Water Heater


  #1  
Old 09-28-13, 01:11 PM
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Plate Heat Exchanger and Water Heater

Here is an idea that I have been toying with over the last year or so.

On the incoming cold like to a water heater taking a plate exchanger and tie in the out going hot line to it.
cold water passing through one side of the plate and the other side has the out going hot.
The idea is to increase the temp of the cold water some to lower the turn around time in the water heater.

Thoughts ????
 
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Old 09-28-13, 02:28 PM
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Thoughts ????

You are asking us if it makes sense to preheat the incoming water with water we just heated in the water heater ?

No.... it doesn't make any sense.
 
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Old 09-29-13, 10:50 AM
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At what point would it?

Water temp of 35F?

With the anti scald items in the house one could set the temp at 125 out on the heater and bump the incoming cold by 15F and shorten the heating time.
 
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Old 09-29-13, 04:12 PM
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So this is for convenience at the expense of cost (energy)?
 
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Old 09-29-13, 05:15 PM
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What you propose accomplishes nothing.
You need a minimum of 125 degF at a hw faucet and by warming up the incoming water you will reduce the outgoing and will need to turn the hw tank to make up for it.

Preheating incoming water only makes sense with waste heat or maybe with a heat pump that uses less energy than the hw tank.
 
 

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