hvac systems design handbook by roger w haines
HVAC Systems Design Handbook part 6
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... Engineers,
Inc., www.ashrae.org. Reprinted by permission from ASHRAE Handbook, 1989 Fundamentals, Chap.
21, Table 2.
Design Procedures: Part 4
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Copyright ... Inc., www.ashrae.org.
Reprinted by permission from ASHRAE Handbook, 2001 Fundamentals, Chap. 35, Fig. 1.)
Design Procedures: Part 4
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Copyright ... any
given flow rate, as shown in Fig. 6.35. Here the flow with one pump
will be about 75 percent of design flow. However, unless a bypass is
provided around the second pump, the system curve will change...
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HVAC Systems Design Handbook part 8
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20/10/2013, 16:15
... implemented.
Source: HVAC Systems Design Handbook
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Copyright â 2004 The McGraw-Hill Companies. All ... capacity versus hot water flow rate.
Design Procedures: Part 6
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Copyright â 2004 The McGraw-Hill Companies. ... output of C2 increases. When
Design Procedures: Part 6
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HVAC Systems Design Handbook part 7
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20/10/2013, 16:15
... heat will be supplied
from the boiler. When cooling is needed, the return water will be
warmer and will be cooled by the evaporative water cooler. Much of
the time, some heat pump units will ... suggesting a low-level site. Where water systems are involved,
pressures may become very high at lower building levels. This is less
of a problem with chillers than with boilers. Systems with boilers ... scrape it off into a tank
which is part of the circulated chilled water system.
Design Procedures: Part 5
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HVAC Systems Design Handbook part 9
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24/10/2013, 15:15
... the water, (2)
the internal tower volume in which air and water come into contact,
(3) the airflow rate through the tower, and (4) the water flow rate.
Tower fill material used to be redwood. Now ... counterflow. In both arrangements, the water enters at the
top of the tower and flows downward through it. In the counterflow
arrangement, the air enters at the bottom and flows upward. In the
cross-flow ... edge of which is immersed
in the water sump, so that as the wheel rotates, water is thrown into
the air. The air passes through pads of fabric or shredded wood which
are wetted by the water spray...
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HVAC Systems Design Handbook part 10
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24/10/2013, 15:15
... a
steam-pressure-reducing station (see Fig. 6.1).
A water-to-water heat exchanger (Fig. 10.12) may be used in many
ways. When it is used with high-temperature water (HTW), the HTW
is always in the tubes. This provides ... control valve may be a two-way or a three-way type, as shown in
Fig. 10.13. This may be part of a cascade arrangement, shown in Fig.
6.3. Two-way valves are used in variable-flow systems.
10.13 Heat ... even when air is blown across the
water surface. Wicks of porous ceramic or similar materials may be
added. When the base of the wick is immersed in water, water spreads
Equipment: Part 2
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HVAC Systems Design Handbook part 11
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28/10/2013, 22:15
... 0.0011 lb /lb (11.2)
wa
Source: HVAC Systems Design Handbook
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Copyright â 2004 The McGraw-Hill Companies. ... controller is reset by
the supply airflow. Single-point flow sensing can be used, but greater
Equipment: Part 3
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Copyright ... the cube of the airflow, denoted by
Equipment: Part 3
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HVAC Systems Design Handbook part 12
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07/11/2013, 19:15
... to
provide power when the primary service is interrupted.
UPS systems are of interest and concern to the HVAC systems de-
signer in two ways:
Electrical Features of HVAC Systems
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wise required roof drain lines or wet sprinkler fire protection. Heating
Electrical Features of HVAC Systems
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motor for both load and fan wheel inertia. Fan vendors can help with
Electrical Features of HVAC Systems
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HVAC Systems Design Handbook part 13
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07/11/2013, 19:15
... relationship between owner and con-
Source: HVAC Systems Design Handbook
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Copyright â 2004 The McGraw-Hill Companies. ... ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap. 48, ‘‘Codes and
Standards.’’
Design Documentation: Drawings and Specifications
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Copyright ... Design Documentation: Drawings and Specifications 423
Figure 13.3
(Continued )
Design Documentation: Drawings and Specifications
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HVAC Systems Design Handbook part 14
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07/11/2013, 19:15
... owners who
have staff personnel with these capabilities. And many owners do not
After Design: Through Construction to Operation
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Copyright ... commissioning team,
selected by and working for the owner, will assist in the design phase
as well as the construction phase, ensuring that the owner’s needs are
met by the design. This is rarely the ... with the design intent in this phase of the work.
14.2.3 Work oversight and field review
The designer can only expect what the designer inspects!
Periodically during construction the project designer...
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Tài liệu HVAC Systems Design Handbook part 15 pptx
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15/12/2013, 03:15
... this definition.
Source: HVAC Systems Design Handbook
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Copyright â 2004 The McGraw-Hill Companies. All ... any other kind
of writing, it takes practice, time, and effort. The neophyte writer may
Technical Report Writing
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Technical Report Writing
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Tài liệu HVAC Systems Design Handbook part 16 pdf
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15/12/2013, 03:15
... volume, lbm/ft
3
.
Source: HVAC Systems Design Handbook
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Copyright â 2004 The McGraw-Hill Companies. All ... ‘‘Fluid Flow.’’
2. Ingersoll-Rand, Cameron Hydraulic Data, 17th ed., Woodcliff Lake, N.J., 1988.
Engineering Fundamentals: Part 1
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Copyright ... the
liquid pumping horsepower will increase with higher-density liquids
and can be accommodated by multiplying the equation by the relative
density of the fluid pumped compared to water. The same is...
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Tài liệu HVAC Systems Design Handbook part 17 pptx
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15/12/2013, 03:15
... of water at the top of a hill has potential
energy with respect to the bottom of the hill.
Source: HVAC Systems Design Handbook
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Copyright ... first law,
we know that some things will not happen unless we expend or give
up something to make them happen.
Ⅲ
Example: A heat resource cannot be fully converted to work. Work
can be withdrawn from ... increasing.
17.4 Second Law of Thermodynamics
There are two classical statements of the second law of thermodynam-
ics. The first was expressed by Kelvin and Planck: No (heat) engine
whose working fluid undergoes...
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Tài liệu HVAC Systems Design Handbook part 18 docx
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15/12/2013, 03:15
... ϭ ЊF ϩ 460Њ.
Source: HVAC Systems Design Handbook
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Engineering Fundamentals: Part 3
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Copyright â 2004 The McGraw-Hill Companies. ... geometry.
Engineering Fundamentals: Part 3
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Tài liệu HVAC Systems Design Handbook part 19 doc
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15/12/2013, 03:15
... Conditioning Engineers, Inc., www.ashrae.org. Reprinted by per-
mission.)
Engineering Fundamentals: Part 4
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Copyright ... evaluated by the perfect gas laws with only a small degree
of error, which is not significant in most HVAC processes. The prop-
erties of interest in this discussion are the dry-bulb (db), wet-bulb
(wb), ... Engineers,
Inc., www.ashrae.org. Abstracted by permission from ASHRAE Handbook, 1997 Fundamentals, Chap.
6, Table 2.
Engineering Fundamentals: Part 4
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Tài liệu HVAC Systems Design Handbook part 20 pdf
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15/12/2013, 03:15
... interference range.
Source: HVAC Systems Design Handbook
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Copyright © 2004 The McGraw-Hill Companies. All ... compressors, air flowing in ducts,
and water and steam flowing in pipes. The paths for transmission are
Engineering Fundamentals: Part 5
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Copyright ... sealed, by using methods sim-
ilar to those shown in Fig. 20.7. When the sleeve is properly installed
Engineering Fundamentals: Part 5
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