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DEVELOPMENTS IN FREEZE-DRYING.

Author(s) : WILLEMER H., LENTGES G., HONRA TH M.

Type of article: Periodical article

Summary

IT IS IMPORTANT TO DETERMINE THE OPTIMUM TEMPERATURES FOR FREEZING AND SUBLIMATION FOR EACH PRODUCT THAT IS TO BE FREEZE-DRIED. SUCH INFORMATION, TOGETHER WITH THE PRESSURES NEEDED MUST BE PUT IN AS DATA TO A CONTROL COMPUTER WHICH WILL MONITOR THE OPERATION OF THE SYSTEM. IN THE PLANT ITSELF, THE CONDENSER CHAMBER SHOULD BE ISOLATED FROM THE DRYING CHAMBER BY A VALVE, SO THAT CONDENSER DEFROSTING CAN BE ACCOMPLISHED WHILE THE CHAMBER IS BEING RE-CHARGED. THE REFRIGERANT EVAPORATOR COOLING THE ICE CONDENSER SHOULD HAVE FULL STANDBY AND THE REFRIGERATION PLANT MUST BE SIZED FOR PEAK LOADS AT THE BEGINNING OF THE SUBLIMATION CYCLE SO THAT THE REQUIRED OPERATING PRESSURE CAN BE MAINTAINED. THESE AND OTHER POINTS ARE EMPHASISED AS THE BASIS OF DESIGN. D.W.H.

Details

  • Original title: DEVELOPMENTS IN FREEZE-DRYING.
  • Record ID : 1983-1611
  • Languages: English
  • Source: Inst. Refrig., Adv. Proof - 4 p.; 5 fig.
  • Publication date: 1982/10/07
  • Document available for consultation in the library of the IIR headquarters only.

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