Chapter hvac engineering Fundamentals: Part 1 Introduction

170
Chapter Six
Figure 6.11
Basic chart for flow rate and velocity of steam in schedule 40 pipe. (
SOURCE
:
Copyright 2001, American Society of Heating, Refrigerating and Air Conditioning En-
gineers, Inc., www.ashrae.org. Reprinted by permission from ASHRAE Handbook,
2001
Fundamentals,
Chap. 35, Fig. 10.)
the out-and-back system will have the lowest first cost but the highest
pumping cost. The loop system will have an intermediate first cost
and the lowest pumping cost. The reverse-return system will have the
highest first cost and an intermediate to low pumping cost. The loop
system is preferable but only if the geometry is suitable.
Design Procedures: Part 4
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