. Bulletin. Agriculture -- New Hampshire. March, 1928] Electric Dairy Cold Storage 17 The rokl storage tompcraturo was 44°. The temperature of the air going to the cooling coils of the comi)ressor was 74" and tliat leaving it was 84°. The high cold room temperature reading shown in the table gener- ally occurcd just after defrosting and di'oppcd ([uickly as soon as the current was again turned on. To obtain some idea of the effect of tlie uninsulated concrete floor, the soil just adjoining (one foot away from floor) was tested and found to be 60° four inches below the top of the bricks an
. Bulletin. Agriculture -- New Hampshire. March, 1928] Electric Dairy Cold Storage 17 The rokl storage tompcraturo was 44°. The temperature of the air going to the cooling coils of the comi)ressor was 74" and tliat leaving it was 84°. The high cold room temperature reading shown in the table gener- ally occurcd just after defrosting and di'oppcd ([uickly as soon as the current was again turned on. To obtain some idea of the effect of tlie uninsulated concrete floor, the soil just adjoining (one foot away from floor) was tested and found to be 60° four inches below the top of the bricks and 58° eight inches below tlie surface. Eight feet away from the room similar test show- ed 62° and 60°. This indicates the continual warfare between the machine and the floor—one attempting to hold the storage at 44° and the other presenting an op])osing temperature of about 60°. Inasmuch as the coldest air in the storage falls to the floor, this is the most im- portant surface to j^roperly insulate. A concrete floor has no insulat- ing qualities alone and transmits moisture very rapidly. These dif- ficulties can be overcome by insulating underneath the concrete. The best practice is to double the amount of insulation that is required in the wall surfaces. Time of Operation of Machine. Due to the system of automatic con- trol, tlie times of day that machines operate were not obtained; but observation indicates that it is largely daylight operation on all three farms. The percent of the total time that the motor equipment has operated. Fig. 6. The motor driven mechanical unit that located outside of the room and connected to the brine tank which is placed inside the storage. The same style unit is used on the three Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New Hampshire Agricultura
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