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Theoretical analysis of cold storage devices in a CO2 transcritical/subcritical supermarket refrigeration plant.
Number: pap. ID: 353
Author(s) : FERRANDI C., ORLANDI M.
Summary
This paper proposes a theoretical study of a cold storage system in a carbon dioxide (CO2) medium temperature (MT) plant for supermarkets application. The aim of this plant strategy is that in the daily hours the storage can export heat form the refrigerant outcoming the gas cooler/condenser whereas during the nightly hours it can be maintained cooled by this latter before its incoming into the evaporator. Besides, the storage can be used for reducing the energy peak consumption, permitting to size the plant on a lower energy target, and it can influence the choice of the optimisation logic of the plant controller. In this work a model for a MT CO2 transcritical/subcritical cycle, able to manage the transient due to the changes of loads and external conditions, is proposed to take into account the evolution with time in a fixed time step. A parametrical analysis has been conduced for understanding the optimal design of the plant. A seasonal analysis is considered too, for understanding the cold storage benefits in different periods of year.
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Details
- Original title: Theoretical analysis of cold storage devices in a CO2 transcritical/subcritical supermarket refrigeration plant.
- Record ID : 30002721
- Languages: English
- Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Publication date: 2011/08/21
Links
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Indexing
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Themes:
CO2;
Thermal energy storage;
Supermarkets, display cabinets - Keywords: Supermarket; Energy storage; Modelling; Transcritical cycle; Refrigerant; CO2
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