Minimum Heating Hot Water Temperature
Minimum Heating Hot Water Temperature
(OP)
Hello All,
I have a question regarding the minimum temperature of hot water entering a heating coil. If I want 95 F leaving air temperature from the coil, what would be the minimum entering water temp that I can have and still get the leaving air temperature I need? I have a situation where I have 120 F water entering the coil. I have determined the GPM's by knowing the load and assuming a delta T of 20 degrees. Typically heating hot water is in the 160 to 180 degree range so I have never though about this before, however with such a low temp entering water this has made me concerned that maybe I will not get the temperature rise in the air that I need. All help is much appreciated! Thanks!
I have a question regarding the minimum temperature of hot water entering a heating coil. If I want 95 F leaving air temperature from the coil, what would be the minimum entering water temp that I can have and still get the leaving air temperature I need? I have a situation where I have 120 F water entering the coil. I have determined the GPM's by knowing the load and assuming a delta T of 20 degrees. Typically heating hot water is in the 160 to 180 degree range so I have never though about this before, however with such a low temp entering water this has made me concerned that maybe I will not get the temperature rise in the air that I need. All help is much appreciated! Thanks!





RE: Minimum Heating Hot Water Temperature
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RE: Minimum Heating Hot Water Temperature
RE: Minimum Heating Hot Water Temperature
RE: Minimum Heating Hot Water Temperature
A 2 row coil and at least 40 deg differential is usually the norm these days.
You save much pump energy flowing less water and the pipe sizes/pumps/etc are smaller which benefits 1st cost.
I woul advocate primary /secondary pumping when using a boiler system tho. 20 deg differential across the boiler and the secondary for the max differential you can get away with.
That's my way to skin the cat.
RE: Minimum Heating Hot Water Temperature
RE: Minimum Heating Hot Water Temperature
RE: Minimum Heating Hot Water Temperature