hvac systems design handbook fifth edition
HVAC Systems Design Handbook part 6
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... ASHRAE Handbook, 2000 HVAC Systems and Applications, Chap. 14, ‘‘Medium- and
High-Temperature Water-Heating Systems. ’’
6. Ingersoll-Rand, Cameron Hydraulic Data, Woodcliff Lake, N.J., 1988.
Design ... the Terms of Use as given at the website.
Design Procedures: Part 4 189
3. ASME, Power Piping Code, ANSI / ASME B31.1-1995.
4. ASHRAE Handbook, 2000 HVAC Systems and Applications, Chap. 11, ‘‘District ... installations.
In general, in-line pumps are used in small systems or secondary
systems, such as freeze prevention loops. Base-mounted pumps are
Design Procedures: Part 4
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HVAC Systems Design Handbook part 8
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... website.
223
Chapter
8
Design Procedures: Part 6
Automatic Controls
8.1 Introduction
HVAC systems are sized to satisfy a set of design conditions, which
are selected to generate a maximum load. Because these design ... properly designed, operated,
and maintained automatic control system is accurate and will provide
economical operation of the HVAC system. Unfortunately, not all con-
trol systems are properly designed, ... sources
Several types of energy are used in control systems. Most older HVAC
systems use pneumatic devices, with low-pressure compressed air at
0to20lb/in
2
gauge. Many systems are electric, using 24 to 120...
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HVAC Systems Design Handbook part 7
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... another
discussion. The HVAC systems designer will recognize plants as po-
tential areas of specialty experience as assignments and interest allow.
References
1. ASHRAE Handbook, 2000 HVAC Systems and Equipment, ... Chap. 14, ‘‘Medium and High Temperature
Water Heating Systems. ’’
2. ASHRAE Handbook, 1999 HVAC Applications, Chap. 33, ‘‘Thermal Storage.’’
Design Procedures: Part 5
Downloaded from Digital Engineering ... the systems described are given in Figs. 7.17,
7.18, and 7.19. These are simple block diagrams to illustrate the con-
cepts. Design of complete plants requires the development of a fully
Design...
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HVAC Systems Design Handbook part 9
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... aircraft
where light weight and simplicity are important. Thermoelectric re-
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... Air Conditioning Engineers,
Inc., www.ashrae.org. Reprinted
by permission from ASHRAE
Handbook, 2000 HVAC Systems
and Equipment, Chap. 34, Fig.
4.)
Sizes range up to as high as 200 tons or more ... Air Conditioning Engineers,
Inc., www.ashrae.org. Reprinted
by permission from ASHRAE
Handbook, 2000 HVAC Systems
and Equipment, Chap. 34, Fig.
7.)
rolling-piston type, the rotor turns on an eccentric...
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HVAC Systems Design Handbook part 10
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... been withdrawn but not replaced.)
5. ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap. 6, ‘‘Panel Heating
and Cooling.’’
6. ASHRAE Handbook, 1999 HVAC Applications, Chap. 32, ‘‘Solar Energy ... other source, such as a process, an incinerator, or re-
frigeration equipment
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... Air Conditioning Engineers, Inc., www.ashrae.org.
Reprinted by permission from ASHRAE Handbook, 2000 HVAC Systems and Equip-
ment, Chap. 44, Fig. 23.)
The coil loop thermosyphon is similar to...
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HVAC Systems Design Handbook part 11
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... 30,000 Btu/h ϫϫ ϫϫ
3
5555 ft 0.075 lb 60 min 1059 Btu
a
ϭ 0.0011 lb /lb (11.2)
wa
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... collection hoods and exhaust systems. Laboratory
and industrial fume hoods require large exhaust air quantities. Sev-
eral standards cover the design of some types of exhaust systems.
1,2
11.11 Smoke ... environmental air-handling systems for primary or supple-
mentary smoke control is neither simple nor economical. There is a
lack of good data on the design of adequate smoke control systems,
and code...
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HVAC Systems Design Handbook part 12
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... 406 Chapter Twelve
1. UPS systems may be a useful, even required component of a critical
HVAC service and will be included in the HVAC and electric system
design.
2. UPS systems themselves create ... of remote origin. The
HVAC designer must work closely with the electrical designer to sat-
isfy the needs of both disciplines.
12.13 Summary
In building construction, HVAC design is interwoven ... website.
397
Chapter
12
Electrical Features
of HVAC Systems
12.1 Introduction
While most HVAC designers will have the support of a competent elec-
trical design staff, it is important to understand...
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HVAC Systems Design Handbook part 13
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... identified as being of
paramount importance to the relationship between owner and con-
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... Construction Specifications Institute, MasterFormat.
4. ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap. 48, ‘‘Codes and
Standards.’’
Design Documentation: Drawings and Specifications
Downloaded ... as given at the website.
411
Chapter
13
Design Documentation:
Drawings and Specifications
13.1 Introduction
Design documents evolve from and include the designer’s calculations,
equipment selections,...
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HVAC Systems Design Handbook part 14
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... during construction, relieving the design office of any possible in-
volvement, except to clarify a conflict in documents or a design error.
Source: HVAC Systems Design Handbook
Downloaded from Digital ... building and its systems.
14.3.3 Observation of operation
Many specifications require the HVAC contractor to certify in writing
that the HVAC systems and controls are operating as designed and
specified. ... project designer.
14.2 Participation during Construction
Designer participation during construction and beyond varies greatly
with design office practice and with the owner’s desires. Some design
offices...
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Tài liệu HVAC Systems Design Handbook part 15 pptx
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... value of the final report will re-
late strongly to the clarity of this definition.
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... of Use as given at the website.
439
Chapter
15
Technical Report Writing
15.1 Introduction
An HVAC designer is almost certain to be faced with the need to write
reports. The ability to produce ... Figure 15.2 illustrates a report form sheet which may be used to
include text, tables, and figures. A design firm may be known to some
extent by the quality of its report formatting and presentation.
Document...
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Tài liệu HVAC Systems Design Handbook part 16 pdf
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... nearly every aspect of HVAC sys-
tems design. Pumps, fans, coils, heat exchangers, refrigeration sys-
tems, process systems, boilers, deaerators, water softeners and treat-
ment systems, water supply ... Blood
and catsup are nonnewtonian fluids.
Density
: Mass per unit volume, lbm/ft
3
.
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... piping and duct systems.
It requires attention to differences in elevation for pumping of ‘‘open’’
systems and teaches us to recognize static-pressure concerns in both
closed and open systems.
Static...
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Tài liệu HVAC Systems Design Handbook part 17 pptx
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... the top of a hill has potential
energy with respect to the bottom of the hill.
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... knowledge
helps an HVAC designer to identify reality among the often overstated
claims of overenthusiastic inventors and salespeople. The mathemat-
ical relationships of thermodynamics allow the designer ... energy input becomes a benefit.
Q ϩ Q
evap in
COP ϭϭCOP ϩ 1
heat cool
Q
in
In heat pump systems, the system designer should again try to work
with the smallest possible thermal lift to get maximum...
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Tài liệu HVAC Systems Design Handbook part 18 docx
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... is used, or for absolute temperatures the Rankine (ЊR) scale:
ЊR ϭ ЊF ϩ 460Њ.
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... and Air Conditioning Engineers, Inc.,
www.ashrae.org. Reprinted by permission from ASHRAE Handbook, 1999 HVAC Ap-
plications, Chap. 32, Fig. 3.)
A
1
ϭ face area of smaller surface, ft
2
T
1
, T
2
ϭ ... fundamentals,
particularly as they apply to HVAC. For a detailed, rigorous treat-
ment, the reader should refer to a good college-level text on heat trans-
fer or to the ASHRAE Handbook.
1
18.2 Heat Transfer...
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Tài liệu HVAC Systems Design Handbook part 19 doc
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... very brief. The subject is
very important to the HVAC designer, and further study of Ref. 1 and
other sources is recommended. Every set of HVAC design calculations
should include one or more psychrometric ... water it can
hold at a specified temperature and pressure. The properties of moist
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... not
uniformly spaced. (Percentage of saturation lines would be uniformly
spaced but are not used in HVAC design. )
When any two properties of a moist air sample are known, a state
point may be plotted...
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Tài liệu HVAC Systems Design Handbook part 20 pdf
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... from ASHRAE Hand-
book, 1987 HVAC Systems and Applications; subsequent edi-
tions are similar, i.e., 2001 Fundamentals, Chap. 7, Table 11.
of the HVAC systems, the HVAC designer is not generally ... for masking unwanted sound, is ran-
dom sound in the speech interference range.
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright ... design
should eliminate these problems.
References
1. ASHRAE Handbook, 2001 Fundamentals, Chap. 7, ‘‘Sound and Vibration.’’
2. ASHRAE Handbook, 1999 HVAC Applications, Chap. 46, ‘‘Sound and Vibration Con-
trol.’’
Engineering...
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