Please recomend Book for Gas to Water Heat exchanger design

[RTRDave]

Heat Transfer is not my baby and I don't want to waste anyones time here. I am wanting to build a gas to Water heat exchanger. BTU input of 150K max. This is to heat a very large water tank to maintain it at a constant temp during the cooler months of winter. I want to pump water into the exchanger that has the exhaust gasses going through it....Please recomend your preferace on a design book for me. I really don't want to get into the depths of therory, I'd rather have something that is more along the lines for manufacturing, something more general. I am not looking for the HVAC design type level of detail.

Thank you for your help.

Dave

 

[pmover]

ok, something along the line of more theory, but should be helpful.

try:

http://www.wlv.com/products/databook/databook.pdf

good luck!
-pmover

 

[EdStainless]

If you a cooling the exhaust from a compustion process you need to watch out for condensation. You will start getting acids condensing at ~285F. This is why the last stage (coolest) on high efficency heaters has to be made from very higly alloyed materials.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[RTRDave]

I was planning on using 304 stainless for everything


Dave

 

[EdStainless]

If the gas is from combustion of natural gas or oil, and you plan on cooling below ~250F two things will happen.
1. You will need forced draft blowers since you will loose natural draft.
2. The coolest portions will need better corrosion protection than 304.
High eff furnaces and water heaters use alloys like SEA-CURE and AL 29-4C if there is a chance of condenstion. Once they collect the condensate they then vent with plastic.
The reason that they condense is to recover the heat of vaporization. This is a big number and really boosts eff.

= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.

http://www.trenttube.com/Trent/tech_form.htm

 

[greenche]

Download the ESCOA Engineering Manual for heat transfer from finned tubes.

http://www.fintubetech.com/escoa/

It provides rating calculations that allow you to calculate number of finned tubes and the configuration.

 

[GenB]

on larger tanks it is best to heat the water outside with a smaller heater then cirtculating with a small pump.
ER