As compared to the temperature maintenance period when the box temperatures are within normal operating range, the beginning of a temperature pull-down period after loading stores of a multibox refrigeration system, the operating conditions of the system would require the flow rate of refrigerant circulating in the system and the suction pressure to do what?
⢠Temperature pull-down period vs. temperature maintenance period in a multibox refrigeration system ⢠Relationship between heat load, refrigerant flow rate, and suction pressure ⢠What happens in the evaporator and compressor when you first load warm stores into cold boxes
⢠When you load warmer stores, does the system see more or less heat that needs to be removed compared to normal box maintenance? How would that affect how hard the compressor has to work? ⢠If the evaporator is absorbing more heat, what happens to the amount of refrigerant that must boil off there and return to the compressor? How does that change suction conditions? ⢠Think about whether high or low suction pressure usually indicates a heavier refrigerating load in a properly adjusted system.
⢠Compare high load (pull-down) conditions to steady-state (maintenance) conditions for both mass flow of refrigerant and suction pressure. ⢠Be sure you know whether increased evaporator loading generally causes suction pressure to rise or fall in a normally controlled system. ⢠Verify which option shows both the correct change in refrigerant flow rate and the matching, realistic behavior of suction pressure under heavy load.
No comments yet
Be the first to share your thoughts!