Heatcraft Refrigeration Products H-ENGM0408 - Manual (Page 7)

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)