User Manual Q&AAnswer
Mar 06, 2025 - 02:00 AM
The KRAMER KM-CTT-0720A Thermobank Hot Gas Defrost system works by utilizing a re-evaporator to ensure a highly efficient defrost cycle. The compressor discharge refrigerant passes through a heating loop submerged in a water-filled bank, then flows through the condenser. The bank stores enough heat to fully re-evaporate all the liquid resulting from the defrost of the evaporator.
During the refrigeration cycle, the refrigerant flows through the evaporator and returns to the compressor as in any standard system. To prevent excessive superheating of the refrigerant vapor returning to the compressor and to maintain the water temperature in the bank, the refrigerant flow bypasses the bank through the suction line solenoid during the refrigeration cycle.
During the defrost cycle, the system goes through a series of valve operations. The discharge solenoid valve closes, the evaporator fans stop, the hot gas solenoid valve opens, the liquid solenoid valve closes, and the suction solenoid valve closes. The warm liquid refrigerant in the liquid line flows through the evaporator, ensuring a rapid defrost and charging the defrost circuit. Additional hot gas condenses in the evaporator, providing a quick defrost at all ambient conditions.
The bank becomes an evaporator during the defrost cycle and absorbs the stored heat. A high-pressure safety control momentarily opens the discharge line solenoid if discharge pressures rise to a high level. After the defrost cycle, the system returns to the normal refrigeration cycle.
Overall, the Thermobank Hot Gas Defrost system provides fast and efficient defrosting while maximizing energy savings and refrigeration capacity.
Add New Comment