Refrigeration Load Estimate Form
(for rooms below 32ºF) Bulletin
Estimate for: | Estimate by: | Date: |
Example: -10ºF Beef Freezer
Basis for Estimate
Room Dimensions: Width
20
Volume: (L) 24
Ambient Temp 90
| 24 | 12 |
| ft. | |
| ft. x Length | ft. x Height | |||
x (W)20 | 12x (H) | 5760 | = |
| cu. ft. |
ºF. (Corrected for sun load) — | Temp. | 100 | ºF. = |
Note: Tables can be found in Engineering Manual,
ºF. T.D.
|
| Insulation |
| Inches | Type |
Ceiling | 4 | Foamed In place Ure |
Walls | 4 | Foamed In place Ure |
Floor | 4 | Foamed In place Ure |
Product Load |
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(a) | 3000 | lbs./dayBeefof | to be reduced from entering temp35. of | ºF. | ||
to freezing point of28 | ºF. (Table7 7) = | ºF. Initial temp. drop |
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and then reduced from freezing point to storage Temp. of | ºF. = (Table 7) | 38 | ºF. Final temp. drop. | |||
(b) | — | gallons of ice cream— @ | overrun |
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Miscellaneous
Motors (including all blower motors)0.5 Lights (assume 1 watt/sq.ft.) 480 No. of People 0
HP | 60 |
|
| Ground Temp. | (Table 21) |
Watts |
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1. Transmission Loads |
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Ceiling: (L)24 | x20(W) | x Heat72 | Load | (Table 1) | 34560 | = |
North Wall: (L)24 | x12(W)(H) | x Heat72 | Load | (Table 1) | 20736 | = |
24 | 12 | 72 |
|
| 20736 |
|
South Wall: (L) | x (W)(H) | x Heat Load | (Table 1) | 17280 | = | |
East Wall: (L)20 | x12(H)W) | x Heat72 | Load | (Table 1) | = | |
(W) | 12 | 72 |
|
| 17280 |
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20 |
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West Wall: (W)(L) | x (W)(H) | x Heat Load | (Table 1) | 24000 | = | |
24 | 20 | 50 |
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Floor: (L) | x (W) | x Heat Load | (Table 1) |
| = | |
2. Air Change Load |
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Volume:5760 | cu. 5ft..2x | Factor 3(Table.56 5) x | Factor (Table 6) 106629 | = |
3.Additional Loads Electrical Motors:0.5 Electrical Lights:480 People Load: 0 Glass Door Load:0
HP x 75000 BTU/HP/24 hr. Watts x 82
People— xBTU/24 hrs. (Table 12) Doors x 31200 BTU/Door/24 hr.
37500 =
39360 =
—=
4. Product Load: (Table 7) (Product Load Figured @ 24 hr. Pulldown*) | ºF. Intial16170Temp. Drop |
| |||
(a) | 3000 | lbs./day0.x77 | Spec. Heat above 7freezing x | = | |
| 3000 | lbs./day100x | Latent Heat Fusion | 300000 | = |
| 3000 | lbs./day0x.4 | Spec. Heat below38freezing x | ºF. Intial45600Temp. Drop | = |
(b) | gallons of ice cream/day— x | BTU/galX 2.4(Table(10 hr19). Pull down)* | — | = |
*For product pulldown time other than 24 hrs. figure 24 hr. load x (24/Pulldown Time) |
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Total Refrigeration Load (1+2+3+4+5) BTU/24 hrs. |
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| 679851 | |
| Add 10% Safety Factor |
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| 67985 |
| Total with Safety/Factor BTU/24 hrs. |
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| 747836 |
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Divide by No. of Operating Hrs. (18) to obtain BTUH Cooling Requirement |
| 41546 | ||
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| 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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