How can I optimize liquid nitrogen consumption of my cryogenic tunnel freezing system?
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||Orest Kochan |
Food Technology Specialist
Optimizing freezer operation typically involves three variables—retention time, belt-loading, and production rate. Retention time must be adequate to freeze the product thoroughly, yet not so excessive as to overfreeze it, which leads to unnecessary consumption of refrigeration. Belt-loadings less than the required density will reduce the freezer output rate and increase liquid nitrogen/unit consumption. Similarly, excessive production rates can reduce the efficiency of a freezer. At increased rates, the freezer attempts to meet the additional heat load by increasing nitrogen flow rates. If excessive, this can reduce the freezer's ability to control temperature.
By identifying and correcting potential problems such as improper retention time, belt-loading, and production rates, you can often realize significant savings in liquid nitrogen consumption.