Vol 91, No 3 (2002)

The increase in profitability of operation of cold stores under present conditions is not possible without restructuring of cold combines. The restructuring includes: arrangement of smaller capacity cold rooms in large compatible rooms that were previously included in the design and now exist at the enterprises; affective system of air cooling of low- temperature rooms with forced air modification; use of completely new derating devices with longitudinal finning instead of standard winding finning; use of heat reflecting materials; improvement of refrigeration treatment of meat products; use of heat exchange apparatuses and devices with the use of electrical convection which allows to manage heat and mass exchange processes; introduction of meat freezing using electrical convection.

At the present time the method of short-term storage of unpacked frozen meat at -12 C instead of -18 C has been developed and being introduced for conditions of increased freight turnover. It ensures the reduction of energy consumption and specific refrigeration consumption in the subsystem of artificial refrigeration consumption by 1.5 times in case of cold rooms loading at 25%. With the loading increase to 100% there will la 3.7-4-fold reduction of refrigeration consumption with the preservation of quality characteristics of products under storage.

The semi-welded plate heat exchangers are welt established to a variety of applications which include: evaporator, condenser, oil cooler, desuperheater, cubcooler, economizer. Semi-welded PH Es are compact, it is means that these to require extremely tow refrigerant charges and minimum space. They are more effective than shell -and-tube heat exchangers and designed for use with ammonia. These units have Gosgortehnadzor permission.

The use of Alfa Laval equipment allows to optimize the operation of refrigeration systems owing to decrease of the ammonia consumption and improvement of thermodynamic characteristics.

The peculiarity of the activity of firms selling refrigeration equipment is to some extent pronounced seasonality of their work. In this regard, the preparation for the season, which usually falls at the end of February - mid-March, occupies a special place. During this period, all the organizational, commercial and technical issues determining the prospects of the company development and ensuring its success on the Russian market are solved to the maximum extent. This article describes how TECHNOBLOCK has prepared itself for the upcoming season.

Grasso is one of the largest manufacturers of compressor units and refrigeration machines based on screw and piston compressors. Delivery of new compressor equipment for use within the existing production is often not reduced to simple replacement of the old compressor unit with a new one of the same capacity, but is usually associated with expansion of the entire production and increase in the capacity of the refrigeration plant. At the same time it is necessary to ensure compatibility of the newly installed refrigeration equipment with the existing compressor fleet, to connect to the existing condensers and evaporators, to combine automatic control and emergency protection systems.