18
Chapter Two
Figure 2.2
Mechanical heating cycle.
There are many different ways to accomplish the functions indicated
in these diagrams. Some of these methods are described in later chap-
ters.
2.5
Control Strategies
No HVAC system can be designed without a thorough knowledge of
how it is to be controlled. Psychrometrics is helpful in control system
design, since the psychrometric chart which describes the HVAC cycles
and provides data for equipment selection also indicates control points
and conditions to be expected. Controls are discussed in Chap. 8.
Do'stlaringiz bilan baham: |