Прогресивні проміжні холодоносії та їх застосування для систем непрямого охолодження

Abstract

Проведено огляд сучасних речовин, які найчастіше застосовуються в холодильних системах непрямого охолодження. Розглянуто перспективи використання проміжних холодоносіїв і шляхи підвищення ефективності проміжних холодоносіїв та холодильних систем непрямого охолодження.

At the present stage of technosphere evolution the energy and resource saving is the priority of national policy for many countries. Refrigeration and air conditioning industry are the energy-intensive sectors of modern industry. One of the ways of dealing with energy consumption problem is the usage of intermediate cooling systems. However, currently used systems have several disadvantages, in particular increased energy and maintenance costs. It is connected with the use of inefficient intermediate refrigerants, modifications of properties of which does not keep pace with the development of cooling systems. The problem of intermediate refrigerants modification can be solved by introducing the nano-sized filling agents. Unfortunately current literature sources do not contain data describing the usage of intermediate refrigerants filled with nano-sized substances because of their large diversity. Therefore, it is reasonable to carry out the researches which would allow evaluating the influence of nano-particles on thermal parameters of intermediate refrigerants and on cooling systems in general. This can be done only due to clear vision of the ideal model of intermediate refrigerant, by matching the existing groups of refrigerants with this ideal model and by selecting the most suitable of them for further modifications with nanoparticles. In order to find the perspective substances for modification, an overview of modern refrigerants, which are most often used in indirect cooling systems, is carried out. By analyzing the latest achievements in nano-technologies it is possible to make a conclusion about their great potential which in nearest future will lead to significant changes in a great number of industry sectors and to the creation of new materials and products.