Heatcraft Refrigeration Products H-ENGM0408, H-ENGM0806 manual

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, H-ENG-2

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)
North Wall: (L)28	x8(H)
South Wall: (L)28	x8(H)
East Wall: (W)8	x8(H)
8	8
West Wall: (W)	x	(H)
Floor: (L)28
	x8(W)

x 72Heat Load	(Table 1)
x 72Heat Load	(Table 1)
x 72Heat Load	(Table 1)
x 72Heat Load	(Table 1)
72
x Heat Load	(Table 1)
x125Heat Load	(Table 1)

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)
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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