RESTORATION OF COOLING EFFICIENCY OF INDUSTRIAL REFRIGERATOR CONSTRUCTIONS
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Keywords:
refrigerant efficiency, reinforcement, load, reconstruction.Abstract
Topical issues in the design of industrial refrigerators, as well as in the operation of existing ones, are energy savings for the production of cold, protection of building envelopes from destruction due to moisture.
The causes of the destruction of the enclosing structures are investigated using the example of an existing industrial refrigerator with a capacity of 16,000 tons, built in 1958 according to a standard project with 5 floors and a basement.
Prefabricated reinforced concrete self-supporting ribbed slabs made of concrete of class C16 / 20 were used as enclosing structures. The panel plate has a thickness of 60 mm and a rib height of 120 mm. The tile part is reinforced with a mesh of reinforcement Ø 6A240C with a mesh of 150 mm. The ribs are reinforced with a frame with working reinforcement Ø 20A400C.
For reasons of violation of the temperature and humidity regime, the lack of waterproofing between the insulation and wall panels, the destruction of mineral wool insulation, the dew point has moved to the thickness of the wall panels, which caused corrosion of the reinforcement with a decrease in its working section by 60-75%. Under the influence of passive pressure, the slab part of the wall panels underwent buckling and partial destruction.
To restore the operational properties (strength and cold efficiency) of wall panels, reconstruction options are proposed: wall repair without dismantling bulging panels by installing a new polyurethane insulation and an external steel frame throughout the facade; the second option is the local repair of individual panels with the dismantling of thin-walled bulging parts and replacing them with sandwich panels with joint sealing instead.
References
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