Chapter hvac engineering Fundamentals: Part 1 Introduction

Equipment: Part 2
363
Figure 10.38
Humidifier with radiant heater.
Figure 10.39
Psychrometric chart for heated-pan humidifier.
䡲
Airflow rate: 10,000 ft
3
/ min with 20 percent outside air
䡲
At design conditions, heat loss and internal humidity gains require
an air supply condition of 85
⬚
F, with
w
⫽
0.0060.
䡲
Mixed air: 62.4
⬚
F; then
w
⫽
0.0054 lb
w
/ lb
a
.
䡲
Latent heat of vaporization of water at 85
⬚
F
⫽
1045 Btu / lb.
Equipment: Part 2
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