Sample selection, Worksheets - sample selection #1 – Bally Refrigerated Boxes BVC Generation C – Direct Drive Air-Cooled – Vertical Air User Manual
Page 28
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WORKSHEETS - SAMPLE SELECTION #1
Preliminary Data Given:
1. Evaporating temp = -20
o
F
2. Condensing temp = 105
o
F
3. Compressor capacity = 300,000 Btuh
4. Design ambient = 90
o
F
Use WORKSHEET - SINGLE CIRCUIT (P 26) to complete selection of condenser
Above selection using condenser model BVC1A23067 ensures condensing temperature will be at 105
o
F or below during
design ambient conditions. See SAMPLE SELECTION # 2 for multiple circuit selections.
1. SYSTEM DATA REQUIREMENTS
EVAP TEMP =
o
F COND TEMP=
o
F
COMPR. CAPACITY=
Btuh / 1000 =
MBH
COND. DESIGN AMBIENT TEMP=
(AT )
o
F
TD=
(Cond. Temp. - Ambient Temp)
COMPRESSOR TYPE=
OPEN
HERMETIC (Refrigerant cooled)
REFRIGERANT= R
REF. FACTOR=
(see P. 2)
ALTITUDE = AT SEA LEVEL or
FEET ALT. FACTOR=
(See P.2)
2. THR (Total Heat of Rejection) CALCULATION
COMPR. CAPACITY (MBH) X
HR f
X
ALT f
X
REF f
= THR (MBH)
X
X
X
=
3. CONDENSER MODEL SELECTION
For the model selected
record the THR PER 1
o
F TD value =
(B) (see P. 2)
4. ACTUAL CONDENSING TEMP CALCULATION
THR (from sec. 2)
/ value (B)
= ATD (actual Temperature Difference)
/
=
To find the Actual Condensing Temp. (ACT) just add the Actual Temperature Difference (ATD)
to the design Ambient Temperature (AT).
ATD
+
AT
=
ACT
+
=
o
F
JOB REF:
COND. MODEL #
TC 1500
-20
105
300,000
300
90
15
22
1
1
300
1.55
1
465
BVC1A23067
32.165
465
32.165
14.5
O
F
14.5
90
104.5
1