Heatcraft Refrigeration Products H-ENGM0806, H-ENGM0408 Example -20ºF Ice Cream Hardening Freezer

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				8
Room Dimensions: Width				12	ft. x Length		1344	ft. x Height
Volume: (L)	14				8	x (H)			=
			x (W)
Ambient Temp		85		ºF. (Corrected for sun load) — Room-20					Temp.

	ft.
105	cu. ft.
	ºF. =

Note: Tables can be found in Engineering Manual, H-ENG-2

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 temp.—of
(a)						ºF.
to freezing point of—		ºF. (Table—7) =	ºF. Initial temp. drop
and then reduced from freezing point to storage Temp. of			—	ºF. = (Table 7)	—	ºF. Final temp. drop.
(b)	100	gallons of ice cream100%@	overrun

Miscellaneous		motors)
Motors (including all blower		0.2
Lights (assume 1 watt/sq.ft.)		168
No. of People	0

HP	60
	Ground Temp.	(Table 21)
Watts

1. Transmission Loads
Ceiling: (L)14	x12(W)	x Heat76	Load	(Table 1)
North Wall: (L)14	x8(H)	x Heat76	Load	(Table 1)
South Wall: (L)14	x8(H)	x Heat76	Load	(Table 1)
East Wall: (W)12	x8(H)	x Heat76	Load	(Table 1)
12	8	76
West Wall: (W)	x (H)	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
	Volume: 1344	cu. ft12. x	Factor (Table3.49 5) x	Factor (Table 6) 56287	=
3.	Additional Loads
	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)		—=
	Glass Door Load:10	Doors x 31200 BTU/Door/24 hr.		—	=

4.Product Load: (Table 7) (Product Load Figured @ 24 hr. Pulldown*)

(a)	—­	lbs./day—x	Spec. Heat above freezing x		ºF. Intial—Temp. Drop			=
	—­	lbs./day—x	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
(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
Divide by No. of Operating Hrs. (18) to obtain BTUH Cooling Requirement	14739

		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

10