Study of an Atmospheric Freeze Drying Refrigeration System

Abstract:

High-pressure air compressed by air compressor, is isobarically cooled and adiabatically expanded and is turned to low temperature air, which enters the adsorbent fluidized bed to freeze the materials. After the freezing of the materials, adsorbent will adsorb water vapor, which can play the effect of atmospheric freeze drying. The recovery power of the expander can be used as input power of the subsidiary refrigeration cycle. In order to adjust the temperature of the fluidized bed, evaporator coils of the affiliated refrigeration system are directly wound on the outer wall of the fluidized bed. This paper studies the combined refrigeration system, and analyzes the influence of different refrigerant pressure ratio, fluidized bed outlet air temperature, and refrigerant selection of subsidiary refrigeration cycle on the performance of the system.

• Periodical: Advanced Materials Research (Volumes 860-863)
• Pages: 1674-1678
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.860-863.1674
• Online since: December 2013
• Authors: Peng Xia*, Kun Tian, Xiao Lu Ma, Le Ren Tao, Ying Ling Cai
• Keywords: Air Refrigeration, Atmospheric, Fluidized-Bed, Freeze Drying

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