Pumping and circulating system with intermediate coolant for refrigeration supply of showcases and cold rooms in shopping centers
- Authors: Kokorin O.Y.1
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Affiliations:
- Moscow State Construction University
- Issue: Vol 91, No 8 (2002)
- Pages: 12-14
- Section: Articles
- URL: https://journal-vniispk.ru/0023-124X/article/view/105775
- DOI: https://doi.org/10.17816/RF105775
- ID: 105775
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Abstract
A pump-circulation refrigeration system using ecologically safe antifreeze (propylene glycol) as if cooling medium is described. A peculiar feature of the system is that in winter time for the reduction of the temperature of antifreeze entering the object to the refrigerated cold frosty air is used with the refrigeration machine being turned off.
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##article.viewOnOriginalSite##About the authors
O. Ya. Kokorin
Moscow State Construction University
Author for correspondence.
Email: info@eco-vector.com
D. in Engineering, Professor
Russian Federation, MoscowReferences
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Fig. 1. Schematic pump-circulation diagram of refrigeration supply by operation of a refrigeration machine or by means of antifreeze, cooled in the stream of outside air: 1 - refrigerating machine; 2 - double antifreeze circulation pump through a cooling heat exchanger in the stream of outside air with variable temperature tH; 3 - antifreeze circulation pipelines through the refrigerating machine condenser; 4 - cooling heat exchanger in outside air stream; 5 - three-way automatic valve to control the temperature of the antifreeze, supplied to the condenser tKD; 6 - bypass pipeline to bypass the cooled antifreeze 7 - double pump of cooled antifreeze circulation through cooling exchanger; 8 - pipelines of antifreeze supply to evaporator; 9 - air cooler; 10 - three-way automatic valve controlled by a sensor; 11 - temperature control in the cooled volume txoli; 12 - pipelines of circulation of the antifreeze, cooled by the outside air in the heat exchanger 4; 13 - hermetic expansion vessel; 14 - solenoid valve (normally open); 15 - solenoid valve (normally closed).
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Fig. 2. Grundfos pumps, widely used in refrigeration systems: 1 - single pump CLM 200/315; 2 - shut-off valves in suction and discharge pipelines; 3 - single pump LP; 4 - water filter; 6 - concrete foundation plinth with anchor bolts for fixing the pump casing; 7 - plug plates of the pump foundation; 8 - double LPD pump.
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