Latent Heat:
Related to dehumidification and moisture control in air conditioning.
Important for achieving optimal humidity control, comfort, energy efficiency, and health.
Method 1: Using Total Heat and Sensible Heat:
Formula: Latent Heat = Total Heat - Sensible Heat.
Example:
Total Heat = 25,000 BTUs/hour.
Sensible Heat = 18,000 BTUs/hour.
Latent Heat = 25,000 - 18,000 = 7,000 BTUs/hour.
The system needs to remove 7,000 BTUs of latent heat per hour to control humidity.
Method 2: Using CFM and Grains of Moisture:
Formula: Latent Heat = 0.68 × CFM × Delta G.
0.68: Constant (derived from air density and BTU conversion factors).
Delta G: Difference in grains of moisture per pound of dry air (found using a psychometric chart).
Example:
CFM = 1000.
Delta G (difference in grains of moisture) = 20 grains/pound.
Latent Heat = 0.68 × 1000 × 20 = 13,600 BTUs/hour.
The system needs to remove 13,600 BTUs of latent heat per hour for dehumidification.
Real-World Importance:
Ensures comfortable humidity levels.
Prevents fogged windows, reduces mold growth risk, and maintains a hygienic environment.
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