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Thread: Sensible Heat Question
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11-08-2011, 01:10 AM #1
Sensible Heat Question
I am studying for my AC General contractors test and have a question about sensible heat.
Sensible heat is the temperature of ?
a.dry bulb
b.wet bulb
c.latent heat
d.dew point
This question might be worded wrong but I could use some advice.
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11-08-2011, 01:15 AM #2
Re: Sensible Heat Question
Hi 10towers
try this link
http://www.daikin.eu/faq/items/sensible-latent-heat.jspIf the World did not Suck, We would all fall off !
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11-08-2011, 03:05 AM #3
Re: Sensible Heat Question
Sensible heat, the amount of heat to raise 1 pound of a substance 1 degree F' expressed in Btu's . Alternatively heat to raise 1 kg one degree C' expressed in watts. [ sensible as in actual temp change ]
Latent heat, amount of energy to change 1 pound of water from liquid to solid as in water to ice without changing temperature, or water to steam. [ latent as in hidden change of state .]
Enthalpy change, difference in wet bulb changes, difference between wet bulb and dry dulb is relative humidity. relative to actual moisture content in air, between saturation and potentional water content.
Dew oint is when the condition of a surface is below the saturation of the ai surrounding it and the water condenses onto the colder surface as water. Example: warm house and cold outside, condensation forms on the interior glass surface, therefore the dew point of interior air has met the surface temperature of glass windows. Colder and you get ice forming inside.
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11-08-2011, 04:08 AM #4
Re: Sensible Heat Question
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11-08-2011, 04:13 AM #5
Re: Sensible Heat Question
Sensible heat, is the temperature you measure with a normal thermometer. You add energy the temp goes up, you remove energy the temp goes down. So when measuring air, sensible heat is your dry bulb
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Re: Sensible Heat Question
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11-08-2011, 04:24 AM #7
Re: Sensible Heat Question
Sensible heat is the temperature of ?
You could have say dry bulb temperature ...
a.dry bulb
Dry air temperature
b.wet bulb
Wet/Moist air temperature
c.latent heat
Wet/Moist air heat (*Sensible heat: Dry air heat)
d.dew point
The dewpoint temperature is the temperature at which the air can no longer hold all of its water vapor, and some of the water vapor must condense into liquid water. The dew point is always lower than (or equal to) the air temperature. (Condition >> Twb=Tdb and 100%RH)
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13-08-2011, 02:17 AM #8
Re: Sensible Heat Question
Thank you everyone for your help.