Commercial refrigeration mid term
four examples of high temperature refrigeration - Answer -flowers
-produce
-wine cooler
-bait coolers
four examples of medium temperature refrigeration - Answer -deli cases
-dairy cases
-prep tables
-meat case
3 examples of low temperature refrigeration - Answer -frozen processed food
-frozen dairy -pet cemetery
what is the high temperature refrigeration box temperature range - Answer 47-60 degrees
what is the medium temperature box temperature range - Answer 28-40 degrees
what is the low temperature box temperature range - Answer -20- 0 degrees an evaporator coil operates at ____ degrees below the box temperature - Answer 10-20 degrees
3 different types of commercial refrigeration evaporators - Answer -fin and tube
-plate
-drum type
fin and tube evaporator - Answer -most common
-pipe with fins attached
plate evaporator - Answer -household refrigerator, refrigerated truck
-no fans
drum type evaporator - Answer -drinking fountain
-suction pipe wraps around cylinder
2 functions of a refrigeration heat exchanger - Answer -it will superheat the vapor
-it will subcool the liquid
an evaporator that operates full of liquid refrigerant is called a ____ type evaporator - Answer flooded
flooded evaporator - Answer 100% liquid in evaporator, much faster heat transfer
an evaporator that operates with approximately 65% liquid and 35% vapor is called a ____ type evaporator - Answer dry
where should line temperature be measured on a refrigeration evaporator when calculating superheat - Answer at the TXV bulb location or the outlet of the evaporator
normal superheat for a refrigeration system - Answer 8-12 degrees
four examples of high temperature refrigeration - Answer -flowers
-produce
-wine cooler
-bait coolers
four examples of medium temperature refrigeration - Answer -deli cases
-dairy cases
-prep tables
-meat case
3 examples of low temperature refrigeration - Answer -frozen processed food
-frozen dairy -pet cemetery
what is the high temperature refrigeration box temperature range - Answer 47-60 degrees
what is the medium temperature box temperature range - Answer 28-40 degrees
what is the low temperature box temperature range - Answer -20- 0 degrees an evaporator coil operates at ____ degrees below the box temperature - Answer 10-20 degrees
3 different types of commercial refrigeration evaporators - Answer -fin and tube
-plate
-drum type
fin and tube evaporator - Answer -most common
-pipe with fins attached
plate evaporator - Answer -household refrigerator, refrigerated truck
-no fans
drum type evaporator - Answer -drinking fountain
-suction pipe wraps around cylinder
2 functions of a refrigeration heat exchanger - Answer -it will superheat the vapor
-it will subcool the liquid
an evaporator that operates full of liquid refrigerant is called a ____ type evaporator - Answer flooded
flooded evaporator - Answer 100% liquid in evaporator, much faster heat transfer
an evaporator that operates with approximately 65% liquid and 35% vapor is called a ____ type evaporator - Answer dry
where should line temperature be measured on a refrigeration evaporator when calculating superheat - Answer at the TXV bulb location or the outlet of the evaporator
normal superheat for a refrigeration system - Answer 8-12 degrees
