Analysis of door openings of refrigerated display cabinets in an operational supermarket

Månsson, Tommie; Rukundo, Adones; Almgren, Magnus; Tsigas, Philippas; Marx, Christian; Ostermeyer, York

doi:10.1016/j.jobe.2019.100899

Cited by 9 publications

(11 citation statements)

References 6 publications

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“…All of these factors affect the performance of the refrigerator and the compressor's power consumption [10,11]. Refrigerators with doors can operate and perform more efficiently than open refrigeration systems [12,13] as they are not affected by the above-mentioned 5 conditions, as shown in Figure 2 below [14]. The comparison clearly indicates the cabinet temperature simulation between open and closed refrigerators, whereby refrigerators with doors being able to maintain a constant temperature more efficiently.…”

Section: Introductionmentioning

confidence: 95%

Improving Energy Efficiency in Supermarkets by Retrofitting Low-E Glass Doors for Open Refrigeration Systems with Digital Semi Hermetic Compressor

Saengsikhiao

Taweekun

2021

ARFMTS

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This research will be presenting energy efficiency improvement options by retrofitting doors for open refrigeration systems in Central Thailand supermarkets that open during the daytime (06:00 am – 06:00 pm), and are closed during the night-time (00:00 am – 6:00 am). The materials and methods used consisted of 15 open refrigeration cabinets with 82 retrofitted doors supported by 41 frames, with the temperature set at medium. The power consumption was indicated in kW, kWh through a power meter data logger for analysis and summarization. The investment required was €21,694 /store, while the payback period of this research was determined to be at 14 months. The cost of energy savings was found to be within a period of 1.1 years, at the rate of 192,220 kWh/year or €18,503 annually. The retrofitted doors is expected to reduce the cooling load and over-burdening of the compressor. The research found that the most viable solution was to use a digital semi-hermetic compressor that can operate in unload and full load status, that was being controlled by the evaporator temperature (TEV) which was set at -10 degree, the condenser temperature (TCD) set at 38 degrees, and the superheat temperature (TSH) at 10 degrees. In the unload status, the power consumption of the digital semi hermetic compressor will decrease by 50%, which has a significant impact for energy savings and is important for night-time when low cooling load is required whereby the compressor’s multiple start–stop cycles are not required. The investment for a digital semi-hermetic compressor was determined to be €7,800/store, and is able to yield energy savings of up to 26,890 kWh/year, or €2,589 annually, with a payback period of 2.9 years.

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Section: Introductionmentioning

confidence: 95%

Improving Energy Efficiency in Supermarkets by Retrofitting Low-E Glass Doors for Open Refrigeration Systems with Digital Semi Hermetic Compressor

Saengsikhiao

Taweekun

2021

ARFMTS

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“…Both ambient temperature and filled volume also affect product temperature variations in closed display cabinets. Manson et al [3] reviewed the modeling and optimization of supermarket refrigeration systems to food safety and customer modeling. It was found that the wastage of energy in the supermarket refrigeration system was caused by the frequency with which the display cabinet doors opened and other refrigerator systems.…”

Section: Introductionmentioning

confidence: 99%

“…Applications in supermarkets were also observed that door opening is the main energy loss in display cabinets and in supermarkets a lot of waste is needed because many display cabinets are open [13,14,15]. In addition, Manson et al [16] conducted an experimental study on the effects of operating conditions, including door opening frequency, ambient air temperature and product occupied volume, on the distribution of air and product temperatures in closed refrigerated display cabinets and obtained that this kind of operation cause significant energy loss.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Display Cabinet Design with Commissioning Test for Fresh Sea Food

Santosa¹,

Waisnawa²,

Wirajati³

et al. 2021

LOGIC

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This research is a design of a display cabinet cooling system with integrated energy from PLN electricity and solar power. This equipment is used for displaying marine fish and other fresh sea food in restaurants or cafes in support of Balinese culinary specialties, namely grilled fish and seafood which are very well known and can be a very extraordinary carrying capacity for Bali tourism. This cooling system is designed to be able to maintain the temperature of the cooling room (cabin) up to -5 oC. This is in accordance with the standards for storing fresh sea fish and sea food in a temperature range of -2oC to 2oC, where fish and sea food are still in a very fresh condition for an average of 1 week. Other standards to maintain product freshness also require room humidity between RH 90% – RH 95%. Furthermore, data collection on system performance is carried out using the commissioning test method to determine the initial performance achievement of the tool so that its shortcomings can be evaluated which will be developed and corrected in further research. From the research, it is found that the temperature achievement is very good, the solar and PLN integration system with the Automatic Transfer Switch (ATS) control system has also worked well where the switch occurs when the battery charging condition is below 30% or below 10V. However, something that has not been achieved is the humidity in this system, the average relative humidity (RH) is 50% so that the final condition of the product becomes dry on the surface of the fish. This relatively low humidity is due to the fact that it still relies on the humidity increase system by opening the cooler cabin door. In the next development, the right humidifier system will be designed for this display cabinet system.

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“…If there is some condition effect to air curtain, for example, 1) Something block return supply 2) Customer pick product 3) Sales area temperate and humidity 4) Wind form air condition return and supply, and 5) Staff Storage that effect to the performance of refrigerated and power consumption of compressor [10][11]. For the refrigerated with doors that can operate and perform better than open refrigerated [12][13] because there are no 5 effect conditions as before, as shown in Figure 2 below [14]. The comparison of cabinet temperature simulation with open refrigerated and doors refrigerated, that doors refrigerated can keep the temperature.…”

Section: Introductionmentioning

confidence: 99%

Improving Energy Efficiency in the Supermarket by Retrofitting Low E Glass Doors for Open Refrigerated

Saengsikhiao

Taweekun

Maliwan

et al. 2020

ARASET

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This research presents the improving energy efficiency by retrofitting doors for open refrigerated in central Thailand supermarkets that open in the daytime (06.00 am - 6:00 pm) and close in night-time (00.00 am – 6:00 am). The Materials and Methods were open refrigerated 15 cabinet and retrofitting doors for open refrigerated that 41 frames, 82 doors in medium temperature refrigeration system and measure power consumption kW, kWh by power meter data logger for analysis and summarize. The power consumption saving average per 7 days for retrofitting doors was 576 kWh/day, 39.67% that daytime 418 kWh/day, 41.93%, and night-time 116 kWh/day, 33.24%. Besides, the energy of day time more than night time because 1) The time of opening store is longer than closing store 2) In the night time, the refrigerated will close by plastic curtain 3) The request cooling load of day time is longer than day time 4) The sale area/ambient temperature of night time more than day time but the humidity was contrasted. Before retrofitting doors, the maximum and minimum of power consumption was 83.25 kw/hour and 44.73 kw/hour, respectively. Also, the power consumption swing at 38.52 kw/hour, 46.72%, and the maximum and minimum of power consumption after retrofitting doors was 33.15 kw/hour and 30.19 kw/hour, respectively. The power consumption swing at 2.96 kw/hour, 8.93%. In addition, the power consumption swing will after be retrofitting doors will less than before retrofitting doors by 1) The average cooling load will be the same as bolt conditions 2) The request cooling load of doors refrigerated will less than by product load, the swing of sale area temperature and humidity, customer behavior that effect power condition will have the low running operation. This research's investment was 21,694 €, while the payback period of this research was 14 months. Besides, within 1.1 years, that energy saving was 16,020 kWh/Month or 1,542 €/Month, 16,020 kWh/month or 192,220 kWh/Year or 18,503 €/Year.

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Analysis of door openings of refrigerated display cabinets in an operational supermarket

Cited by 9 publications

References 6 publications

Improving Energy Efficiency in Supermarkets by Retrofitting Low-E Glass Doors for Open Refrigeration Systems with Digital Semi Hermetic Compressor

Improving Energy Efficiency in Supermarkets by Retrofitting Low-E Glass Doors for Open Refrigeration Systems with Digital Semi Hermetic Compressor

Analysis of Display Cabinet Design with Commissioning Test for Fresh Sea Food

Improving Energy Efficiency in the Supermarket by Retrofitting Low E Glass Doors for Open Refrigerated

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