Abstract
Low temperature is the key to maintain the high quality for chilled food. The single jet air curtain is used for doorways opening insulation in the current circumstances is an idealization of the single jet air curtain used in the supermarket open refrigerated display cabinets. Open refrigerated display cabinets are going through some of the changes in their thermal behavior and of its overall performance due to variations in air conditions like air curtain temperature, velocity, height/width ratio, deflection module, specific cooling load, stability and thermal efficiency. A detailed experimental and comprehensive Artificial Neural Network Analysis of air conditions and energy transfer in an open refrigerated display cabinet is performed in this study. Numerical ANN predictions are 99.77% accurate and can be used to enable quick calculations and parametric analyses for the designing purposes of open refrigeration equipment that reduce the thermal infiltration of the Open Refrigerated Display Cabinet and increase the food safety.
Highlights
Most retail food stores, functioning as supermarkets, grocery stores and convenience stores, use open refrigerated display cabinets (ORDC) to facilitate access to the product and display of the perishable product without inconvenience
REMARKS The Predicted Air Curtain Thermal Efficiency is taken as a target value of the program, whereas the height, velocity, height/width ratio, the temperature inside Air Curtain, Temperature outside Air Curtain, Deflection Module, Specific Cooling Load and Air Curtain Stability were taken as the input values of the program
The Predicted Air Curtain Thermal Efficiency value on the basis of eight parameters has arrived for the variable Sample Air Curtain Thermal Efficiency
Summary
Most retail food stores, functioning as supermarkets, grocery stores and convenience stores, use open refrigerated display cabinets (ORDC) to facilitate access to the product and display of the perishable product without inconvenience. Depending on the characteristics of the store, factors such as the location of the ventilation holes of the air conditioning system, the air mass flow due to the pressure differences due to openings in the environment and the instabilities of the warm surrounding air flow influence the energy efficiency and thermal performance of display cabinet. These parameters are essential because large commercial stores spend approximately 50% of their energy on cooling load [6] and for foodstuff safety, maintenance of the foodstuff temperature is very necessary [2]. This will indicate that a height/width ratio of less than 5.2 would mean that the velocity of the single-jet air curtain would be managed from the delivery position to the extractor grid of the refrigerated cabinet
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