Heat transfer method on freeze dryer, We need to understand

Before purchasing a freeze dryer, customers need to understand the two heat transfer methods used in freeze dryers to grasp the drying principle, which method is faster, why some machines are expensive while others are cheaper, and many other issues to understand how to use them effectively. This article will analyze the two most common heat transfer methods currently used in these modern drying devices.

The two images in this content will clearly show customers the two methods of heat transfer or heat transfer in a freeze dryer, which method is faster, and how they are applied. Mactech currently has two lines of freeze dryers: one is a small machine with direct heat transfer as shown in Figure 1, and the other is an industrial dryer with solvent-based heat transfer as shown in Figure 2.

The small dryer group includes 5kg and 3kg dryers, two common models currently used for small-scale production, low-volume drying, small businesses, product research, or home use. Small dryers have a cylindrical drying chamber with a small diameter, thus facilitating heat transfer from the chamber walls to the drying trays. This design is suitable, cost-effective, and ensures efficient drying of products on a small scale. The price of a 5kg freeze dryer is 90 million VND and a 3kg dryer is 70 million VND, making them very suitable for current customer needs.

Industrial freeze dryers are designed with a much more complex heat transfer system compared to smaller models. This heat transfer method is typically applied to larger machines (10kg capacity or more) due to the large drying chamber, multiple trays, and the need for fast, efficient, and uniform heat supply. Therefore, solvent heat transfer systems are often used. These two heat transfer methods are generally not interchangeable because solvent heat transfer has a complex structure, high cost, and is difficult to use in smaller machines, while direct heat transfer is difficult to apply to larger machines as it increases drying time and slows down the process.

With the above basic information, readers now have a better understanding of the two heat transfer methods in freeze dryers and which dryers are suitable for each. For advice on choosing the right dryer for your product requirements, please contact Mactech for more information. Thank you for reading this information.