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Description / Abstract:
OBJECT AND SCOPE
The scope of this Code covers, but is not limited to, the testing of
mechanical draft heat
exchangers, of both the forced draft and induced draft types; natural
draft heat exchangers; and
fan assisted natural draft heat exchangers.
From a heat transfer surface standpoint, this Code covers all tube
bundle orientations, including:
vertical, horizontal, and slanted conduit heat exchangers.
Both bare surfaces and finned surfaces are included as conduit type
heat exchanger components.
While conventional round tubes with circular fins are assumed in this
Code, the procedures can be
modified by mutual agreement to apply to other surface configurations.
While the cooling fluid is restricted to atmospheric air, the
tube-side fluid can be any chemical
element, compound or mixture, in single-phase flow, liquid or gas, or
in two-phase flow.
This Code is written under the assumption that the Air Cooled Heat
Exchanger (ACHE) may be tested
as having a discrete process stream or that only one process fluid
stream is being investigated. In
other cases, modifications must be made to the procedures presented.
Such modifications shall be
agreed by the parties to the test.
The scope of this Code also includes, directly or by reference,
recommended methods for obtaining
data, measurements, observations, and samples to determine the
following:
(a) Physical Dimensions
(b) Air Flow Rate
(c) Air-Side Pressure Differential
(d) Fan Driver Power
(e) Sound Level
(f) Atmospheric Pressure
(n) Environmental Effects
(h) Wind Velocity
(i) Air Temperatures
(j) Entering Air Temperature
(k) Exit Air Temperature
(l) Process Fluid Temperatures
(m) Process Fluid Pressures
(n) Process Fluid Flow Rate
(o) Composition of Process Fluid
(p) Percent Capability
(q) Process Fluid Pressure Drop