HVAC Systems Design Handbook part 8
HVAC Systems Design Handbook part 8
... website.
Design Procedures: Part 6 245
Figure 8. 28
Straight-through (two-way) control valve.
Figure 8. 29a
Quick-opening (flat seat) valve.
8. 3.3.1 Control valves.
A control valve (Fig. 8. 28) includes ... Use as given at the website.
Design Procedures: Part 6 243
Figure 8. 25
Wheatstone bridge.
Figure 8. 26
Bridge circuit with calibration and set point.
Design Procedures:...
HVAC Systems Design Handbook part 6
... the HVAC designer is enthalpy, particularly the enthalpy of evaporation, or the latent heat of vaporization h fg . This is the amount of heat, in Btu per pound, which Design Procedures: Part ... pressures allow smaller piping but create piping expansion and support problems. In- Source: HVAC Systems Design Handbook Downloaded from Digital Engineering Library @ McGraw-Hill (www.d...
HVAC Systems Design Handbook part 7
... was
discussed in Sec. 6.6 .8.
All the above figures (Figs. 7.1–7 .8) suggest four-pipe systems, in
which chilled water and hot water or steam are separated. A two-pipe
distribution system is designed to provide ... 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 developmen...
HVAC Systems Design Handbook part 9
... 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 ... is usually 10 to
20ЊF, although 8 to 10ЊF is common for vapor compression systems
and 15 to 20ЊF is common for absorption systems. The approach is the
Equipment...
HVAC Systems Design Handbook part 10
... website.
321
Chapter
10
Equipment: Part 2
Heating
10.1 Introduction
Heating is the first word in the acronym HVAC. It is the most impor-
tant part because without heating mankind would have difficulty in
surviving. Proper design ... other source, such as a process, an incinerator, or re-
frigeration equipment
Source: HVAC Systems Design Handbook
Downloaded from Digital Engineerin...
HVAC Systems Design Handbook part 11
... air
temperatures ( 58 F supply air), the design flow rate of air, designated
CFM, in cubic feet per minute (cfm) will be
120,000
3
CFM ϭϭ5555 ft /min (cfm) (11.1)
20 ϫ 1. 08
where 1. 08 is the air factor ... 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...
HVAC Systems Design Handbook part 12
... 103.5
2 08 2 18 197 200 220– 180
240 252– 2 28 230 253– 207
480 504– 456 460 506– 414
2300 2415–2 185 2200 2420–1 980
4160 4370–3950 4000 4400–3600
12.4 Power Factor
In ac systems where the voltage ... website.
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...
HVAC Systems Design Handbook part 13
... Construction Specifications Institute, MasterFormat.
4. ASHRAE Handbook, 2000 HVAC Systems and Equipment, Chap. 48, ‘‘Codes and
Standards.’’
Design Documentation: Drawings and Specifications
Downloaded ... science, but it can and
must be mastered by HVAC system designers. The drawings and spec-
ifications complement each other, complete the design, and are part of
the legally bindin...
HVAC Systems Design Handbook part 14
... 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 ... 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 Handboo...
Tài liệu HVAC Systems Design Handbook part 15 pptx
... 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 ... 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 produc...
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