CHILLING PLANTS: Cold water requirement of bakery industry is mostly met by chilling
plants .Cold water are used in mixer jackets in summer to maintain the dough temperatures .
Temperature plays a very vital role in dough formation .
Chilling plant are following type
Open type : Cooling is done in storage tank the refrigerant after expansion is allowed in
streams of pipe which are submerged into water to exchange heat . water is circulated
through pump in piplines which are insulated. These coils act as evaporative coils. It has
components like compressor and condenser .Capacities of chilling plant varies as per the
load eg 7.5 ton to 20 tons . Cooling tower s are required to lower the temperatures of
returing hot water .Cold water is also required for mixing of chocolate varieties . Where
temperature required are of 5deg c to 6 deg c
Closed loop type : Chilled water is circulated through a pump and it circulates within the
pipe .Now days scroll compressor are used in such type of chillers which are energy efficient
.Pipelines are insulated through out .
Capacities varies from 7.5 ton to 20 tons
The cold water can also be circulated in storage
tanks to maintain temperatures during peak
summer for milk solutions etc
DIRECT EXPANSION CHILLERS : These are storage tanks where milk solution are stored for
usage . The expansion takes between plates which are provided all across the surface of
tanks. These are compact and cna be installed easily at any location . These plate act as
evaporative coil s . Capacities could be 3.0ton - 5.0 ton .
WALK IN COLD STORAGES: The Automated bakery plants with volumes more than 2ton/day
and more production have certain raw material which has to be kept in cool and dry place.
Ingredients like fat , butter , chocochips , certain additives are required to be kept in cold
places. To store these products manufacturers have created prefabricated panel type walk in
cold room . These cold rooms can be installed/ dismantled easily as these have puf panels.
Cooling is done by refrigeration units consisting of evaporative units , condensing units and
refrigerant compressors . Temperatures required are -2 deg c to 4 deg c . Capacities of
refrigeration varies from 5.0 ton to 10 ton . Bigger cold rooms or warehoses have ammonia
refrigerant plants to maintain temperatures
DEEP FREEZERS : These are required for keeping ingredients handy at production site .
Materials from cold room are transferred to these deep freezers in batches . These also acts
as storage unit in case of break downs / stoppage of production due to some reason.
These are compact and have smaller refrigeration capacities from 2.0 to 3.0 ton .
REFRIGERATORS: These are mostly used in laboratory where you have to keep certains
vitamins / enzymes and additives in cold and dry place . These could be of cap 300ltrs-
500ltrs capacities
REFRIGERATED VANS: These refrigerated vans are required to bring chocolates or
butters from port or warehouse .
Next - bakery equipments for heating application
REFRIGERATION EQUIPMENTS IN BAKERY INDUSTRY
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