Cork insulation; a complete illustrated textbook on cork insulation ...

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CORKBOARD ICE CREAM CABINET 401
cream cabinet must tlierefore he a careful investigation and
research into the ability of the insulating material to retain
its initial insulating efficiency under the conditions of its appli-
cation in the walls of the cabinet and for an indefinite period
of time under known or anticipated conditions of service. If
such research rexeals that the <strong>insulation</strong> cannot be expected to
stand up under the conditions to be imposed, there probably
will be fewer reasons for going ahead with the plans to test
out the cabinet.
Ice cream cabinet service is much more severe than the
service that household refrigerators receive. Thus the proper
<strong>insulation</strong> to use and the correct specifications to be followed
in installing it, are of much more importance in the ice cream
cabinet than they are in units that operate at considerably
higher temperatures. The experience of the dairy and ice
cream industries for the past several decades in the <strong>insulation</strong>
and operation of refrigerated milk rooms, cream rooms, ice
storage rooms, hardening rooms, antl cold rooms in general,
is of value as research into the fitness or lack of fitness of any
insulating material for ice cream cabinet construction and
temperatures. I'ure corkboard is the standard material for all
such rooms in countless plants all over the United States, the
reason for which was elaborated in the section of this text on
"The Insulation of Ice and Cold Storage Plants and Cold
Rooms in General," and which amounts to the fact that corkboard
is the onl)- suitable material employed for such purpose
that when intelligently installed will retain approximately 90
per cent of its initial insulating efficiency for ten years or
more.
I In testing various kinds and sizes of corkboard insulated
' equally
I'.i results
[ held
ice and salt cabinets, assuming that virtually the same or
satisfactory specifications were followed in installing
the corkboard in the cabinets, and assuming that the results
are to be made available for general comparison with the
of other tests made at different times and places, the
following conditions sh(ndd be obserxed :
(a) A constant temperature room should be used, the temperature
uniform to within one degree Fahr. hy electric heater placed within
|| hollow walls of the test room and controlled hy thermostat.