Heat and Human Comfort

1
Heat and Human Comfort

• HVAC
• CNST 305
• Environmental Systems 1
• Dr. Berryman

2
Heat

• Simple molecular motion
• Heat Exchange

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Principles of Heat Transfer

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Methods of Heat Transfer
warm air
cool air
hot water
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Measuring Heat Quantity
1 lb water
1 Btu
61F
60F
1 kg water
1 kcal 4.19 kJ
16C
15C
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Sensible versus Latent Heat
sensible heat
60F 15.6C
212F 100C
latent heat
212F 100C
212F 100C
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Radiant Heat

• Infrared radiation

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Examples of Heat Sources

• Computer
• Light fixtures
• Coffee pot
• Sun
• People

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Heat Generated by People
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Surrounding Air Conditions
What makes the body feel comfortable?
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Factors Affecting Human Comfort
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Next Time

• The Study of Air/Water Mixtures
• Reading Assignment
• Chapter 2 (Toa)