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Heat Transfer a Different Elevations

Heat Transfer a Different Elevations

Heat Transfer a Different Elevations

(OP)
When a heater is installed at a higher elevation than sea level does it take more or less gas to heat the bath

RE: Heat Transfer a Different Elevations

Not anywhere neat 100% sure I understand the question, but there is a post only a few clicks below this one about "Thermal conductivity of a vacuum", the main jist being that pressure does not affect thermal conductivity of a gas unless you get to extremely low levels, as in less than .01 Torr.

-Plasmech

Mechanical Engineer, Plastics Industry

RE: Heat Transfer a Different Elevations

The other half of the answer is that only the BOILING point is affected by pressure, so unless the intent is the consume the bather afterwards, the heating to a non-boiling temperature is the same, since you'd most likely do this in a water heater that's amply insulated.

TTFN

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RE: Heat Transfer a Different Elevations

I wish this forum had an "edit" feature...ugh.

-Plasmech

Mechanical Engineer, Plastics Industry

RE: Heat Transfer a Different Elevations

The film coefficient will change with gas conductance/density which changes with elevation.

Higher elevations will require more gas to heat the bath because heat transfer is lower.

RE: Heat Transfer a Different Elevations

I think willard's got it. Properties of the hot flue gases will change with pressure. Increasing elevation = decreasing pressure = changes making the heat transfer process less eficient.
Doug.

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