Experimental analysis of heat transfer and airflow in a closed refrigerated display cabinet

Experimental and numerical characterization of airflow in a closed refrigerated display cabinet using PIV and CFD techniques

“…On the other hand, these door gaps can facilitate defogging process on the glass doors . Warm air inflow and cold outflow through the gaps were observed in our previous study (Chaomuang et al, 2019a). A PIV measurement was additionally conducted in the middle of the left door gap throughout the height of the door to quantify the volumetric air infiltration rate through the gaps (8 mm in width).…”

“…Reffering to our previsous study (Chaomuang et al, 2019a), the air and product temperatures were measured by using calibrated thermocouples (± 0.2 ºC accuracy) in the middle section of a closed refrigerated display cabinet which operated under closed-door conditions and at a room temperature of 19 °C (humidity ratio of 0.003-0.004 kg of water /kg of dry air). Timed-averaged temperatures were calculated over 5 h of quasi-steady state during which the defrosting period was excluded.…”

“…3. This experimental result was taken from our previous study (Chaomuang et al, 2019a). It was found that the products at the front of the top shelf had the highest temperature (about 2.3-2.4 °C) whereas the products at the back of the bottom shelf had the lowest temperature (about -0.5 °C).…”

“…A review of the literature on experimental and numerical investigations of the performance of display cabinets was carried out by the authors (Chaomuang et al, 2017). An experimental study of heat transfer in a closed display cabinet was conducted and the effect of operating conditions on the product temperature was highlighted: room temperature, door-opening frequency and occupiedvolume percentage (Chaomuang et al, 2019a(Chaomuang et al, , 2019b. In order to build on our previous studies, the objectives of this study were:…”

“…The thermal aspects were discussed based on the results obtained from previous studies (Chaomuang et al, 2019a(Chaomuang et al, , 2019b. The experimental and numerical methodologies developed in this study can be useful to scientists for understanding the phenomena and for the industry in order to improve the design under various operating conditions.…”