7
Refrigeration Load Estimate Form
(for rooms above 32ºF) Bulletin Above32-05
Basis for Estimate
Room Dimensions: Width
ft. x Length
ft. x Height
ft.
Volume: (L)
x (W)
x (H) = cu. ft.
Ambient Temp ºF. (Corrected for sun load) — Room Temp ºF. = ºF. T.D.
Product Load
(a) lbs./day of to be reduced from entering
temp. of ºF. to ºF. Temp. Drop ºF.
(b) lbs./day of to be reduced from entering
temp. of ºF. to ºF. Temp. Drop ºF.
Miscellaneous
Motors (including all blower motors) HP Ground Temp. (Table 21)
Lights (assume 1 watt/sq.ft.) Watts
No. of people
2. Air Change Load
Volume: cu. ft. x Factor (Table 4) x Factor (Table 6)
=
3. Additional Loads
Electrical Motors: HP x 75000 BTU/HP/24 hr.
=
Electrical Lights: Watts x 82
=
People Load: People x BTU/24 hrs. (Table 12)
=
Glass Door Load: Doors x 19200 BTU/Door/24 hr.
=
4. Product Load: Sensible (Product Load Figured @ 24 hr. Pulldown*)
(a) lbs./day x Spec. Heat (Table 7) x ºF. Temp Drop
=
(b) lbs./day x Spec. Heat (Table 7) x ºF. Temp Drop
=
*For product pulldown time other than 24 hrs. figure 24 hr. load x (24/Pulldown Time)
5. Product Load: Respiration*
(a) lbs. stored x BTU/lbs./24 hrs. (Table 8)
=
(b) lbs. stored x BTU/lbs./24 hrs. (Table 8)
=
*For consideration of previously loaded product, a multiplier of (5) is normally applied to the daily
product load (Line #4)
Divide by No. of Operating Hrs. (16) to obtain BTUH Cooling Requirement
Equipment Selection
Condensing Unit
Unit Cooler
System Capacity
Qty. Model No.
Qty. Model No.
BTU/hr.
Total Refrigeration Load (1+2+3+4+5) BTU/24 hrs.
Add 10% Safety Factor
Total with Safety/Factor BTU/24 hrs.
1. Transmission Loads
Ceiling: (L)
x (W)
x Heat Load
(Table 1)
=
North Wall: (L)
x (W)
x Heat Load
(Table 1)
=
South Wall: (L)
x (W)
x Heat Load
(Table 1)
=
East Wall: (L)
x (W)
x Heat Load
(Table 1)
=
West Wall: (L)
x (W)
x Heat Load
(Table 1)
=
Floor: (L)
x (W)
x Heat Load
(Table 1)
=
Insulation
Inches
Ceiling
Walls
Floor
Type
2175 West Park Place Blvd. • Stone Mountain, GA 30087 • 770.465.5600 • Fax: 770.465.5990 • www.heatcraftrpd.com
Estimate for:
Estimate by:
Date:
Note: Tables can be found in
Engineering Manual, H-ENG-2
(H)
(H)
Example: 35ºF Convenience Store Cooler With Glass Doors
8 28 8
28 8 8 1792
85 35 50
4 Styrene
4 Styrene
6 Concrete
2000 Beer
85 35 50
200 Milk
40 35 5
0.2 60
224
0
28 8 72 16128
28 8 72 16128
28 8 72 16128
8 8 72 4608
8 8 72 4608
28 8 125 28000
1792 13 1.86 43331
0.2 15000
224 18368
0 —
10 192000
2000
0.92 50 92000
200
0.93 5 930
— — —
— — —
447229
44723
491952
30747
(W)
(H)
(W)
(H)
