Trane TRG-TRC004-EN Air Compressor User Manual


  Open as PDF
of 55
 
32 TRG-TRC004-EN
notes
period three
The Compressor in a System
As mentioned previously, a VAV system varies the quantity of air supplied to the
space in order to satisfy the load. The supply temperature is held constant in
this system.
In a VAV DX system, the capacity of the compressor is controlled by sensing the
temperature of the air being supplied to the system. The compressor is loaded
or unloaded based on how close the actual supply air temperature is to the set
point.
In contrast to the DX system examples shown previously, a chilled-water
system responds to changing space loads by controlling the capacity of the
chilled-water cooling coil. Although there are various methods of controlling
the capacity of this coil, this discussion will assume the use of a modulating
water valve.
VXSSO\
VXSSO\
IDQ
IDQ
WKHUPRVWDW
WKHUPRVWDW
9$9
9$9
ER[
ER[
9DULDEOH$LU9ROXPH';6\VWHP
';FRROLQJ
';FRROLQJ
FRLO
FRLO
VHQVRU
VHQVRU
FRPSUHVVRU
FRPSUHVVRU
FDSDFLW\
FDSDFLW\
FRQWUROOHU
FRQWUROOHU
Figure 45
&KLOOHG:DWHU6\VWHP
HYDSRUDWRU
HYDSRUDWRU
FRPSUHVVRU
FRPSUHVVRU
FDSDFLW\FRQWUROOHU
FDSDFLW\FRQWUROOHU
PRGXODWLQJ
PRGXODWLQJ
ZDWHUYDOYH
ZDWHUYDOYH
SXPS
SXPS
FRLO
FRLO
VXSSO\
VXSSO\
IDQ
IDQ
WKHUPRVWDW
WKHUPRVWDW
Figure 46
 previous next