Chapter hvac engineering Fundamentals: Part 1 Introduction

Design Procedures: Part 5
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Figure 7.6
Multiple chiller plant with pressure bypass.
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With the advent of low-cost, reliable, variable-speed pumping ca-
pability, a chilled water plant scheme has developed which is becom-
ing a favorite in the industry. The concept is illustrated in Fig. 7.7.
The plant is set up in a loop with one or more chillers circulated,
with a low-head pump for each chiller. The chillers and chiller
pumps are staged on and off based on system demand. Coming off
the plant supply line, pumps with variable-speed control deliver
supply water to the system loads.
Every
load has a two-way modu-
lating valve to meter chilled water to match the load. Load-side coils
Design Procedures: Part 5
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