Refrigeration Load Estimate Form
(for rooms above 32ºF) Bulletin
Estimate for: | Estimate by: | Date: |
Basis for Estimate |
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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. = | ||
Note: Tables can be found in Engineering Manual,
ºF. T.D.
| Insulation |
Inches | Type |
Ceiling
Walls
Floor
Product Load |
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(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 |
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Motors (including all blower motors) | HP | Ground Temp. | (Table 21) | ||||||||
Lights (assume 1 watt/sq.ft.) |
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| Watts |
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No. of people |
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1. Transmission Loads |
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Ceiling: (L) | x (W) | x Heat Load | (Table 1) | = | |||||||
North Wall: (L) | x | (W)(H) |
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| x Heat Load | (Table 1) | = | ||||
South Wall: (L) | x |
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| x Heat Load | (Table 1) | = | ||||
(H)W) | |||||||||||
East Wall: |
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| x Heat Load | (Table 1) | = | ||
(W)(L) | (H)W) |
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West Wall: |
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| x |
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| x Heat Load | (Table 1) | = |
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(W)(H) |
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| (W)(L) |
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Floor: (L) | x (W) | x Heat Load | (Table 1) | = | |||||||
2. Air Change Load |
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Volume: |
| cu. ft. x | Factor (Table 4) x | Factor (Table 6) | = | |
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3. Additional Loads |
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Electrical Motors: |
| HP x 75000 BTU/HP/24 hr. |
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Electrical Lights: |
| Watts x 82 |
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People Load: |
| People x | BTU/24 hrs. (Table 12) |
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Glass Door Load: |
| Doors x 19200 BTU/Door/24 hr. |
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4. Product Load: Sensible | (Product Load Figured @ 24 hr. Pulldown*) |
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(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) |
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5. Product Load: Respiration* |
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(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. |
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Add 10% Safety Factor |
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Total with Safety/Factor BTU/24 hrs. |
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Divide by No. of Operating Hrs. (16) to obtain BTUH Cooling Requirement |
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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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