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Patrick L.Whitworth, CPD, and Anthony W. Stutes, PE, CPS : Plumbing Systems & Design :
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Gerald J. Williams, PE :
:
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: Career education :
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Beijing Daily . . . . Gree Haier . ( TCL . Wuhan ) . Hubei .
Standard ASHRAE 62.1 )ASHRAE( ANSI/ASHRAE Standard 62.1-2004 . Dennis Stanke
: . . CD . ASHRAE . )ARI( )NIST( . . ASHRAE . www.ashrae.org
Carrier . . . . . ANSI/AMCA 204-05 )AMCA( )ANSI( ANSI/AMCA 204-05 . . . . . ISO 14694:2003 . . . www.amca.org Munters HCU 4000 Munters . .
. . . Victaulic
Victaulic . : 350 psi , Carrier Carrier . John Mandyck . :
ASHRAE ARI )ARI( )ASHRAE( . ASHRAE ARI . . ARI . ASHRAE . ASHRAE ARI . ARI ASHRAE ARI Mark Menzer : . ASHRAE . ASHRAE . ARI ASHRAE . ARI ASHRAE . . http//:www.org.ari.
HCU 4000 . )DX( . . . : Munters Danny Dotson DX . HCU 4000 . DX . . : 4000 scfm . . COP Smith Cast Iron
Smith 28HE . 28HE . . . MBH : Cast Iron Boilers
Julius Ballanco, P. E. :
:
. ) ( PEX PEX PEXALPEX . . : . PEXALPEX . . . . . StadlerViega . PEXALPEX . PEX PEX PEX . . PEXALPEX PEXALPEX . PEX PEXALPEX PEXALPEX . PEXALPEX . . . PEXALPEX ! . PAP .
PEXALPEX . PEXALPEX . . : . . PEXALPEX : PEX . . . PEX ALPEX . PEX PEX PEX . PEX PEX ! . PEXALPEX . PEXALPEX . . PEXALPEX . PEX . . PEXALPEX . PEXALPEX
:
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John Siegenthaler, P. E. :
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ALP :
=0.033 W/mc =0.033 W/mc mm mm ALP =0.021 W/mc ( ) S U . t2t1 Q= US)t1t2( U ) ( ) ( . oC
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. ) ( . : Q1= 12361 KWh Q2=8991 KWh Q3=4670 KWh
ALP . ALP 3 kw ( )ALP( ) . ) ( . ALP
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Kelly Faloon :
:
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. . . )Modulating Boiler( . ) ( )throttling( . . . . / . . . . . . . . . . . ) ( . . .
Timothy A. Smith, CPD : Plumbing Systems & Design :
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conditions. 12. To avoid cavitation and trouble-free design, the available of this must always be greater than the required of this. 14. This is used in the stuffing box to prevent leaks where abrasive substances could damage mechanical seals. 16. Used predominantly in clean hydronic applications in the stuffing box part of the pump to prevent leaks. 18. If the absolute pressure at this nozzle of the pump approaches the vapor pressure of the liquid, then vapor pockets form in the impeller passages. 19. If the static pressure is present due to the height of the liquid in the system or pressure in a compression tank, this is sometimes referred to as “Independent ” and is added to the system curve.
Answer
ACROSS
DOWN
2. This is determined by comparing the output power to the input power (e.g., output/input = (whp/bhp)x100%) 4. In this type of pump, an electric motor or other power source rotates the impeller at the motor’s rated speed. 10. Another type of pump that is used if a close-coupled pump is not desired is called a - coupled pump. 11. This type of pump has a diffuser casing in lieu of a volute casing that is used on many other pump types. 13. This type of casing permits complete access to the impeller for maintenance. 15. When pumps are applied in this arrangement, each pump operates at the same head and provides its share of the system flow at that head. 17. A -mounted pump is generally either end-suction/ frame mounted or double-suction/split-case style. 19. This institute publishes “Centrifugal Pumps, Standards HI 1.1 to 1.5,” which should be used to design the sump when sump-mounted pumps are used. 20. In this type of pump, the motor is mounted on the pump casing and the suction and discharge piping is generally horizontal.
1. The difference between the pressure a pump can produce at a given impeller size and speed and the required pressure at a flow condition less than full flow. This can be corrected by using variable-speed pumps. 2. One cause of inadequate or no fluid circulation is air which can be caused by poor inlet conditions at the pump suction nozzle. 3. Two pump types are close- or flexible5. Another term for pump laws which are useful for estimating pump performance at different rotating speeds or impeller diameters based on a pump with known characteristics. 6. The rotation of this component in the pump adds energy to the fluid after it is directed into the center or eye of this component. 7. This part of the pump is designed for the maximum conversion of velocity energy of the fluid into pressure energy. 8. A non-overloading one of these should be used (i.e., the nameplate rating must exceed the pump brake horsepower at any point on the pump curve). 9. These represent the average results from testing several pumps of identical design under the same
John Siegenthaler, P. E. :
:
= AFUE( AFUE . ) . : . . . . : = / . Btu . Btu/hr . :
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. . . . Efficiency( . )Delivery : = / .
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Ross Mackay :
: pumps & systems :
. )Total Static Head( . ) ( . ) . ) . ) . ) ( . : . . . . . . . . .
. B . . . . . . ! 1-Batch process
. . A . . . . C . . .
L. A. Van Veghel :
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Proposal Maker . . Windows XP Windows 95 . . www.elitesoft.com
Proposal Maker Elite Software . HVAC . . Chvac Microsoft Word . PDF . Microsoft Word Word . Proposal Maker Rhvac Elite Audit . )( . . )Field( Word . . )( . . . . . . . )Customize(
Ray W. Moore, PE, CPD : Plumbing Systems & Design :
. : . . . . : . psig . 70 psig 70 70 psig . . . . . . . . . . . . . . . .
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: Energy Service :
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World Pumps magazine :
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