The Liquid Nitrogen Consumption of LN2 Flash Fast Freezer

The operating cost of the liquid nitrogen flash freezing machine primarily depends on the liquid nitrogen consumption, calculated as follows:

Liquid nitrogen consumption per hour (kg)=hourly product production (kg)Xconsumption ratio

The consumption ratio refers to the amount of liquid nitrogen consumed per kilogram of product. For conventional foods such as dough, shrimp fillets, meat slices, and small pre-portioned food items, the consumption ratio ranges from 1:1.0 to 1:1.3. For high-moisture and thicker foods, such as whole fish, thick-cut steaks, and products thicker than 8cm, the consumption ratio ranges from 1:1.2 to 1:1.5.

For example, if a production line freezes 500kg of shrimp per hour, with a consumption ratio of 1:1.2, the hourly liquid nitrogen consumption would be 500X1.2=600kg. Multiplying 600kg by the local liquid nitrogen price is the primary operating cost per hour for the liquid nitrogen quick freezing machine.

Why isn't the consumption ratio an exact value? Because liquid nitrogen rapid freezer from Sichuan Aosituo adopts a dynamic control system that automatically adjusts the liquid nitrogen flow rate based on the target temperature and real-time cabinet temperature. The product has high heat and load, and the liquid nitrogen valve sprays too much; The product is cool and has a small load, and the liquid nitrogen valve sprays less. So the real-time consumption of liquid nitrogen is changing, mainly due to the following four reasons.

1. Product thickness: The thicker the product, the longer the cold penetration time, and the higher the consumption of liquid nitrogen.
2. Feed temperature: The lower the feed temperature, the lower the consumption of liquid nitrogen. So precooled products will save more liquid nitrogen usage.
3. Packaging type: No packaging has the highest efficiency; Vacuum packaging has little impact and is close to no packaging; Air containing packaging is strongly not recommended - air is the insulation material, and the heat transfer efficiency decreases significantly, leading to a sharp increase in liquid nitrogen consumption.
4. Working temperature: The working temperature range of liquid nitrogen blast freezing machine from Sichuan Aosituo is from 0℃ to -120℃. The lower the setting, the faster the freezing and the higher the production capacity, but the higher the liquid nitrogen consumption. The temperature setting should be based on product characteristics and quality, not the lower the better.

The liquid nitrogen quick freezer mainly includes cabinet and tunnel liquid nitrogen fast freezing machines, detailed technical specifications are available.