Selection procedure (with example)
ENGLISH
NOTE: Contact your local Carrier representative for a com-
puter selection (based on the Reciprocating Chiller Selec-
tion program of Carrier’s electronic catalog), or follow the
procedure below.
I Determine unit size and operating conditions
required to meet given capacity at given
conditions.
Given:
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . 77 Tons
Leaving Chilled Water Temp (LCWT) . . . . . . . 44 F
Cooler Water Temp Rise . . . . . . . . . . . . . . . 10° F
Entering Condenser Water Temp . . . . . . . . . . 85 F
Condenser Water Temp Rise . . . . . . . . . . . . 10° F
Fouling Factor (Cooler and
Condenser) . . . . . . . . . . . . . . . . . . . . .
.00025
NOTE: For other than 10° F temperature rise, data
corrections must be made; also, on some units a change
of controls is necessary.
FOR HR (Fluid-Cooled Condenser):
Enter the Performance data table on page 21 at 44 F
LCWT and 85 F Condenser Entering Water Tempera-
ture. Read down the capacity column to a capacity that
equals or exceeds the given capacity. Read across to
obtain the operating conditions required to obtain the
listed capacity. Use cooler and condenser pressure drop
curves to determine the respective pressure drops. Fi-
nal unit selection should be based on present and fu-
ture job requirements and the economics of the job.
FOR 30HS (Condenserless):
Use same method. For remote condenser data,
refer to appropriate Carrier condenser Product Data
literature.
Contact your local Carrier representative for a com-
puter selection of chiller system combinations with
Carrier air-cooled condensers other than those shown
in Performance Data tables.
II From Performance Data table and pressure drop
curves, determine operating data for selected
unit.
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 30HR080
Capacity . . . . . . . . . . . . . . . . . . . . . . . . 77.2 tons
Compressor Motor Power Input . . . . . . . . 68.6 kW
Cooler Water Flow. . . . . . . . . . . . . . . . . . 185 gpm
Cooler Pressure Drop . . . . . . . . . . . . . . . . . 10.6 ft
Condenser Water Flow . . . . . . . . . . . . . 229.3 gpm
Condenser PressureDrop . . . . . . . . . . . . . . 10.0 ft
SI
NOTE: Contact your local Carrier representative for a com-
puter selection (based on the Reciprocating Chiller Selec-
tion program of Carrier’s electronic catalog), or follow the
procedure below.
I Determine unit size and operating conditions
required to meet given capacity at given
conditions.
Given:
Capacity . . . . . . . . . . . . . . . . . . . . . . . . . 270 kW
Leaving Chilled Water Temp (LCWT) . . . . . . . . 7 C
Cooler Water Temp Rise . . . . . . . . . . . . . . . 5.6° C
Entering Condenser Water Temp . . . . . . . . . . 30 C
Condenser Water Temp Rise . . . . . . . . . . . . 5.6° C
Fouling Factor (Cooler and
Condenser) . . . . . . . . . . . . . . . . . . . . . . .
.044
NOTE: For other than 5.6° C temperature rise, data
corrections must be made; also, on some units a change
of controls is necessary.
FOR 30HR (Fluid-Cooled Condenser):
Enter the Performance Data table on page 25 at 7 C
LCWT and 30 C Condenser Entering Water Tempera-
ture. Read down the capacity column to a capacity that
equals or exceeds the given capacity. Read across to
obtain the operating conditions required to obtain the
listed capacity. Use cooler and condenser pressure drop
curves to determine the respective pressure drops. Fi-
nal unit selection should be based on present and fu-
ture job requirements and the economics of the job.
FOR 30HS (Condenserless):
Use same method. For remote condenser data,
refer to appropriate Carrier condenser Product Data
literature.
Contact your local Carrier representative for a com-
puter selection of chiller system combinations with
Carrier air-cooled condensers other than those shown
in Performance Data tables.
II From Performance Data table and pressure drop
curves, determine operating data for selected
unit.
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 30HR080
Capacity . . . . . . . . . . . . . . . . . . . . . . . . 273.0 kW
Compressor Motor Power Input . . . . . . . . 69.6 kW
Cooler Water Flow . . . . . . . . . . . . . . . . . 11.6 L/s
Cooler Pressure Drop . . . . . . . . . . . . . . . 31.5 kPa
Condenser Water Flow . . . . . . . . . . . . . . 14.5 L/s
Condenser Pressure Drop . . . . . . . . . . . . 29.8 kPa
17
