Heatcraft Refrigeration Products H-ENGM0806, H-ENGM0408 manual

Table 4

Average air changes per 24 hours for storage rooms above 32ºF. (0ºC.) due to door openings and infiltration.

	Air		Air		Air
Volume	Changes	Volume	Changes	Volume	Changes
Cu. Ft.	Per 24hrs.	Cu. Ft.	Per 24hrs.	Cu. Ft.	Per 24hrs.
200	44.0	2,000	12.0	25,000	3.0
250	38.0	3,000	9.5	30,000	2.7
300	34.5	4,000	8.2	40,000	2.3
400	29.5	5,000	7.2	50,000	2.0
500	26.0	6,000	6.5	75,000	1.6
600	23.0	8,000	5.5	100,000	1.4
800	20.0	10,000	4.9	150,000	1.2
1,000	17.5	15,000	3.9	200,000	1.1
1,500	14.0	20,000	3.5	300,000	1.0

Table 5

Average air changes per 24 hours for storage rooms below 32ºF. (0ºC.) due to door openings and infiltration.

	Air		Air		Air
Volume	Changes	Volume	Changes	Volume	Changes
Cu. Ft.	Per 24hrs.	Cu. Ft.	Per 24hrs.	Cu. Ft.	Per 24hrs.
200	33.5	2,000	9.3	25,000	2.3
250	29.0	3,000	7.4	30,000	2.1
300	26.2	4,000	6.3	40,000	1.8
400	22.5	5,000	5.6	50,000	1.6
500	20.0	6,000	5.0	75,000	1.3
600	18.0	8,000	4.3	100,000	1.1
800	15.3	10,000	3.8	150,000	1.0
1,000	13.5	15,000	3.0	200,000	0.9
1,500	11.0	20,000	2.6	300,000	0.85

Note: For heavy usage multiply the above values by 2.0

For long storage multiply the above values by 0.6

Table 6

Heat removed in cooling air storage room conditions (BTU per Cu. Ft.)

Storage									Temperature of Outside Air
	Room		40ºF. (4.4ºC.)		50ºF. (10ºC.)		85ºF. (29.4ºC.)			90ºF. (32.2ºC.)			95ºF. (35ºC.)		100ºF. (37.8ºC.)
	Temp.							Relative		Humidity of Outside		Air, %
ºF.		ºC.	70	80	70	80	50	60		50	60		50	60	50	60
55		12.8	–	–	–	–	1.12	1.34		1.41	1.66		1.72	2.01	2.06	2.44
50		10.0	–	–	–	–	1.32	1.54		1.62	1.87		1.93	2.22	2.28	2.65
45		7.2	–	–	–	–	1.50	1.73		1.80	2.06		2.12	2.42	2.47	2.85
40		4.4	–	–	–	–	1.69	1.92		2.00	2.26		2.31	2.62	2.67	3.65
35		1.7	–	–	0.36	0.41	1.86	2.09		2.17	2.43		2.49	2.79	2.85	3.24
30		-1.1	0.24	0.29	0.58	0.66	2.00	2.24		2.26	2.53		2.64	2.94	2.95	3.35
25		-3.9	0.41	0.45	0.75	0.83	2.09	2.42		2.44	2.71		2.79	3.16	3.14	3.54
20		-6.7	0.56	0.61	0.91	0.99	2.27	2.61		2.62	2.90		2.97	3.35	3.33	3.73
15		-9.4	0.71	0.75	1.06	1.14	2.45	2.74		2.80	3.07		3.16	3.54	3.51	3.92
10		-12.2	0.85	0.89	1.19	1.27	2.57	2.87		2.93	3.20		3.29	3.66	3.64	4.04
5		-15.0	0.98	1.03	1.34	1.42	2.76	3.07		3.12	3.40		3.48	3.87	3.84	4.27
0		-17.8	1.12	1.17	1.48	1.56	2.92	3.23		3.28	3.56		3.64	4.03	4.01	4.43
-5		-20.6	1.23	1.28	1.59	1.67	3.04	3.36		3.41	3.69		3.78	4.18	4.15	4.57
-10		-23.3	1.35	1.41	1.73	1.81	3.19	3.49		3.56	3.85		3.93	4.33	4.31	4.74
-15		-26.1	1.50	1.53	1.85	1.92	3.29	3.60		3.67	3.96		4.05	4.46	4.42	4.86
-20		-28.9	1.63	1.68	2.01	2.00	3.49	3.72		3.88	4.18		4.27	4.69	4.66	5.10
-25		-31.7	1.77	1.80	2.12	2.21	3.61	3.84		4.00	4.30		4.39	4.80	4.78	5.21
-30		-34.4	1.90	1.95	2.29	2.38	3.86	4.05		4.21	4.51		4.56	5.00	4.90	5.44

Table 3, 4 & 5 extracted and reprinted by permission from ASHRAE 1972 Handbook of Fundamentals.

Table 6 extracted and reprinted by permission from ASHRAE 1967 Handbook of Fundamentals.

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