Vol 104, No 7 (2015)

To produce liquid and gaseous industrial gases the air separation plants (ASP) are used. High energy cost that defines a primecost of produce is typical for the ASP. Due to this fact the problem of energy supply at operation of such plants is topical as well as of great practical importance. The implementation of energy saving technologies allows reducing the cost and improving the quality of products produced. The air separation plant KzhKzh0,04 (Astrakhan) was the object to investigate. The Astrakhan oxygen station of “Kislorod”, closed corporation, is equipped with two KzhKzh0,04 ASP to supply in part the enterprises of the Astrakhan region with liquid oxygen. The results of the industrial experiment carried out on the equipment operating in 2010-2013 were analyzed. As a result an energy saving system based on an absorption lithium bromide refrigerating machine (ABRM) was offered. The analysis of efficiency of the energy saving system was carried out on the basis of modeling with elaboration of the program “Analysis of power efficiency of an air separation plant using ABRM”. The efficiency of the energy saving system operation may be defined at wide range of external parameters change. Keywords: energy saving, air separation plant, oxygen, nitrogen, absorption litium bromide refrigerating machine

The article examines the results of works on optimization of the technology of fruits and vegetables transportation and storage under refrigeration conditions using systems of the continuous cold chain “fieldconsumer” (CCC). The perspective methods and conditions of prerefrigeration (using air, cryogenic agent, iceslurry etc.) as well as the role of species features of the vegetable raw material when choosing regulations of stages of the CCC were defined. The author paid attention to creating multivariant solutions of the technology of fruits and vegetables storage in modified atmosphere including the use of domestic polymeric packages with gas selective membranes. The efficiency of using cryogenic agents as well as carbon dioxide ice and nitrogen refrigeration systems at the stages of the CCC was considered. It was revealed that the quality of soft berries was kept better in containers refrigerated with carbon dioxide ice, but the quality of solid skin berries and fruits (for example plums) was kept better at liquid nitrogen system using. The analysis of perspective trends to process fruits and vegetables using ionizing radiation (gammarays, accelerated electrons) is given. The analysis of prospective trends of using the ionizing radiation processing of fruits and vegetables (gammarays, accelerated electrons) together with refrigeration processing and modified atmosphere to inhibit a pathogenic microflora, to regulate after harvest maturation processes, to reduce losses due to mass decrease and spoiling is given. The method also gives the possibility to prevent the formation of aflatoxins. The domestic technologies developed for refrigeration, transportation and storage of fruits and vegetables allow increasing the CCC efficiency and accordingly reducing losses of the fruit and vegetable produce 3-10 times. Keywords: continuous cold chain, duration of prerefrigeration of the product, modified atmosphere, package with gas selective membranes, cryogenic agents, ionized radiation processing of fruit and vegetable produce