Refrigeration Load Estimate Form
(for rooms below 32ºF) Bulletin Below32-05
Estimate for: | Estimate by: | Date: |
Example: -20ºF Ice Cream Hardening Freezer
Basis for Estimate | 12 |
| 14 |
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| 8 | |||
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Room Dimensions: Width | 12 | ft. x Length | 1344 | ft. x Height | |||||
Volume: (L) | 14 |
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| 8 | x (H) |
| = | ||
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| x (W) |
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Ambient Temp | 85 |
| ºF. (Corrected for sun load) — | Temp. |
| ft. |
105 | cu. ft. |
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 | — | lbs./day of— | to be reduced from entering |
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(a) | ºF. | |||||
to freezing point of— | ºF. | ºF. Initial temp. drop |
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and then reduced from freezing point to storage Temp. of | — | ºF. = (Table 7) | — | ºF. Final temp. drop. | ||
(b) | 100 | gallons of ice cream100%@ | overrun |
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Miscellaneous |
| motors) |
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Motors (including all blower | 0.2 | |
Lights (assume 1 watt/sq.ft.) | 168 | |
No. of People | 0 |
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HP | 60 |
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| Ground Temp. | (Table 21) |
Watts |
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1. Transmission Loads |
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Ceiling: (L)14 | x12(W) | x Heat76 | Load | (Table 1) |
North Wall: (L)14 | x8(H)W) | x Heat76 | Load | (Table 1) |
South Wall: (L)14 | x8(H)W) | x Heat76 | Load | (Table 1) |
East Wall: (W)(L)12 | x8(W)(H) | x Heat76 | Load | (Table 1) |
12 | 8 | 76 |
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West Wall: (W)(L) | x (H)W) | x Heat Load | (Table 1) | |
Floor: (L)14 | x12(W) | x Heat58 | Load | (Table 1) |
12768 | = |
8512 | = |
8512 | = |
7296 | = |
7296 | = |
9744 | = |
2. | Air Change Load |
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| Volume: 1344 | cu. ft12. x | Factor (Table3.49 5) x | Factor (Table 6) 56287 | = |
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3. | Additional Loads |
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| Electrical Motors:0.2 | HP x 75000 BTU/HP/24 hr. | 15000 | = | |
| Electrical Lights:168 | Watts x 82 |
| 13776 | = |
| People Load: 0 | People— x | BTU/24 hrs. (Table 12) |
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| Glass Door Load:10 | Doors x 31200 BTU/Door/24 hr. | — | = |
4.Product Load: (Table 7) (Product Load Figured @ 24 hr. Pulldown*)
(a) | Spec. Heat above freezing x | ºF. | = | |||||
| Latent Heat Fusion |
| — |
| = | |||
| lbs./day x | Spec. Heat below freezing x | ºF. Intial Temp. Drop | = | ||||
| — |
| BTU/galX 2.4(Table(10 hr19). Pull down)* | — | 102000 |
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(b) | 100 | gallons of ice cream/day425 x |
| = |
*For product pulldown time other than 24 hrs. figure 24 hr. load x (24/Pulldown Time)
Total Refrigeration Load (1+2+3+4+5) BTU/24 hrs. | 241191 |
Add 10% Safety Factor | 24119 |
Total with Safety/Factor BTU/24 hrs. | 265310 |
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Divide by No. of Operating Hrs. (18) to obtain BTUH Cooling Requirement | 14739 |
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| Equipment Selection |
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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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