Chapter hvac engineering Fundamentals: Part 1 Introduction

4.4
The Psychrometric Chart
When the system type has been selected and a summary completed,
showing design CFM, temperature difference (TD), and latent load, it
is time to complete the psychrometric chart. For a detailed discussion
of psychrometrics, see Chap. 19. Consider a single-zone, draw-through
air-handling system, as in Fig. 4.1. In summer the return air is mixed
with some minimum amount of outside air; is pulled through the filter,
the coils, and the fan; and is supplied to the space. Cooling is provided
by the cooling coil through the use of chilled water (as in this example)
Design Procedures: Part 2
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