Vacuum Cooling Knowledge Base

Vacuum Cooling Knowledge Base

This section collects our engineering material on vacuum cooling — precooling of fresh produce, rapid cooling of cooked food and vacuum freeze drying. It comes from project records and equipment selection work, organised by topic.

Working Principles

• Phase change and heat transfer in vacuum cooling
• Two-stage evacuation in food vacuum coolers: the water ring pump removes the bulk of the air, the rotary vane pump takes the chamber down to the working pressure. Vegetable precoolers run on rotary vane pumps.
• Fresh produce precooling and cooked food rapid cooling are two different duties. The material enters at a different temperature — fresh produce 2530°C, cooked food 8090°C — and that difference drives the whole selection.

Selection and Engineering Parameters

• Sizing by batch weight: 1000 kg, 3000 kg and 6000 kg class machines
• Condenser options: air-cooled, water-cooled and evaporative
• Vacuum pump configuration rules for each duty

Applications

• Fresh produce preservation, central kitchen, aquatic processing, freeze-drying preparation, cold storage and laboratories

Where to Go Next

• Technical Library — equipment selection notes and engineering parameters
• AI Knowledge — ask a question and get an answer from our technical material
• Application Cases — how machines are configured in real installations
• FAQ — common questions on cooling time, weight loss and equipment selection