Storage of respiratory produce

摘要

A method and system for storage of respiratory produce includes a storage environment, a gas analyze, a CO2 scrubber, a gas sampling pump, a gas pump for the scrubber, an air supply, an N2 supply and valves for flow control. The control system is a software assisted measurement system and control algorithm that takes into account the gas exchange dynamics of both the produce and the storage environment and a mathematical model for determining the actual respiratory and fermentative rates of the produce. The system is suitable for low oxygen storage of respiratory produce.

主权项

1. A control system for controlling the storage of respiratory produce in a defined confined storage environment, said control system comprising:
at least one gas analyzer comprising a control unit arranged to determine an adjusted gas medium composition of the confined storage environment for protecting the produce against fermentative degradation; and at least one operator/actuator arranged to adapt the gas medium in the confined storage environment based on said determined adjusted gas medium composition; wherein the control unit is arranged to determine the adjusted gas medium composition based on a mathematical model of the system that determines the actual respiratory and fermentative rates of the produce and on the evaluation of the gas exchange dynamics of the storage system comprising the gas exchange dynamics of the respiratory produce, the storage atmosphere and the outside, the adjusted gas medium composition being determined as a function of the calculated total gas exchange rate quotient (GERQ) in the confined storage environment, whereby GERQ is calculated asGERQ=(ⅆCO2ⅆt+k⁢⁢Δ⁢⁢CO2)(-ⅆO2ⅆt+k⁢⁢Δ⁢⁢O2)  in aerobic and anaerobic conditions, wherebyⅆⅆt  is the rate of change with time t, O2and CO2are the oxygen and carbon dioxide concentration, k is the leak transfer rate constant that is greater than 0 and characteristic of the storage environment at the time of storage, and ΔO2 is the difference between the concentration of oxygen in the environment and the storage room and ΔCO2is the difference between the concentration of carbon dioxide in the storage room and the environment.