Shelf life of different fish species stored with passive refrigeration (PRS)

摘要

Passive Refrigeration—PRS?- is a system developed for the preservation and transport of perishable products. Passive Refrigeration—PRS? technology is based on thermal accumulation (“Thermal Charge”) achieved through the freezing of eutectics obtained by circulating cold brine when power is available and/or has a competitive price. After the initial “Thermal Charge” the fusion enthalpy provides the energy necessary to absorb the released heat progressively and proportionally to requirements, maintaining optimal preservation conditions for the specified period (“Thermal Autonomy” from 2 up to 30 days or more) without further use of energy and cooling groups. The large heat exchange surface and the minimum ΔT between the air and the surface itself avoid dehumidification of the air, dehydration and weight loss of the products, and defrosting operations. The system guarantees perfect preservation through the maintenance of optimal temperature and relative humidity without the use of power during operation. The aim of this work was to evaluate the efficacy of this technology in the storage of different fish products.