Refrigeration Load Estimate Form
(for rooms above 32ºF) Bulletin Above32-05
Estimate for: | Estimate by: | Date: |
Example: 35ºF Convenience Store Cooler With Glass Doors
Basis for Estimate
Room Dimensions: Width8
Volume: (L) 28
Ambient Temp 85
| 28 |
|
| 8 |
| ft. x Length |
| ft. x Height | |
x (W)8 | 8 | x (H) | 1792 | = |
ºF. (Corrected for sun load) — Room35 Temp
| ft. |
50 | cu. ft. |
ºF. = |
Note: Tables can be found in Engineering Manual,
ºF. T.D.
|
| Insulation |
| Inches | Type |
Ceiling | 4 | Styrene |
Walls | 4 | Styrene |
Floor | 6 | Concrete |
Product Load | 2000 | lbs./dayBeerof |
|
| |
(a) | to be reduced from entering | ||||
temp. of | 85 | ºF. to35 | ºF.50Temp. Drop | ºF. | |
(b) | 200 |
| lbs./dayMilkof | to be reduced from entering | |
temp. of | 40 | ºF. to35 | ºF. 5Temp. Drop | ºF. |
Miscellaneous
Motors (including all blower motors)0.2 Lights (assume 1 watt/sq.ft.) 224 No. of people 0
HP | 60Ground Temp. | (Table 21) |
Watts |
|
|
1. Transmission Loads |
|
|
|
|
Ceiling: (L)28 | x8(W) | x 72Heat Load | (Table 1) | |
North Wall: (L)28 | x8(H)W) | x 72Heat Load | (Table 1) | |
South Wall: (L)28 | x8(W)H) | x 72Heat Load | (Table 1) | |
East Wall: (W)(L)8 | x8(H)W) | x 72Heat Load | (Table 1) | |
8 | 8 | 72 |
| |
West Wall: (W)(L) | x |
| x Heat Load | (Table 1) |
(W)H) | ||||
Floor: (L)28 |
|
| x125Heat Load | (Table 1) |
x8(W) |
16128 =
16128 =
16128 =
4608 =
4608 =
28000 =
2. Air Change Load | 13 | 1.86 |
| 43331 |
| |
| 1792 |
|
| |||
Volume: |
| cu. ft. x | Factor (Table 4) x | Factor (Table 6) |
| = |
3.Additional Loads Electrical Motors:0.2 Electrical Lights:224 People Load: 0 Glass Door Load:10
HP x 75000 BTU/HP/24 hr. Watts x 82
People— xBTU/24 hrs. (Table 12) Doors x 19200 BTU/Door/24 hr.
15000 =
18368 =
=
192000 =
4. Product Load: Sensible | (Product Load Figured @ 24 hr. Pulldown*) |
| |||
(a) | 2000 | lbs./day x 0.92 | Spec. Heat (Table507) x | ºF. Temp Drop | |
(b) | 200 | lbs./day x 0.93 | Spec. Heat (Table 57) x | ºF. Temp Drop |
*For product pulldown time other than 24 hrs. figure 24 hr. load x (24/Pulldown Time)
92000 =
930 =
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) |
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Total Refrigeration Load (1+2+3+4+5) BTU/24 hrs. |
|
| 447229 | ||
| Add 10% Safety Factor |
|
| 44723 | |
| Total with Safety/Factor BTU/24 hrs. |
|
| 491952 | |
|
|
| |||
Divide by No. of Operating Hrs. (16) to obtain BTUH Cooling Requirement |
| 30747 |
|
| Equipment Selection |
| |
Condensing Unit |
| Unit Cooler | System Capacity | |
Qty. | Model No. | Qty. | Model No. | BTU/hr. |
2175 West Park Place Blvd. • Stone Mountain, GA 30087 • 770.465.5600 • Fax: 770.465.5990 • www.heatcraftrpd.com
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