Vol 106, No 9 (2017)

A gas phase losses in a sealed closed habited object occur because of periodical connections of lock chambers with the environment as well as owing to the discharge of a gas phase from a dead volume of apparatuses that absorb СО2 breathed out by personnel. The paper presents a comparative analysis of these two reasons of nitrogen losses from the atmosphere of an inhabited sealed closed object. The dependence for the  comparison coefficient of nitrogen losses was obtained; the influence of a relative volume of the lock and the frequency of locking on the coefficient was examined. It was revealed that the losses of the atmosphere components (oxygen, nitrogen) from the closed object might be compared when the gas composition provision system (GCPS) was operating and when the connection with the lock chamber was made. It is necessary to compensate a nitrogen loss to prevent the pressure reduction in the closed sealed volume.

Сryoprotective properties of the liquid and hardened “PRAM” additive allows lowering storage temperatures of meat products from 0 to -4 оС without freezing and prolonging their freshness considerably. This opens the perspective for modernization of refrigeration equipment used for cooling to -3...-4 оС without freezing meat produce during production, warehouse storage, logistics, wholesale and retail realization as well as in a domestic refrigerator.