Performance and Sizing of Solar Driven dc Motor Vapor Compression Refrigerator with Thermal Storage in Hot Arid Remote Areas

El-Bahloul, Asmaa Ahmed M.; Ali, Ahmed Hamza H.

doi:10.1016/j.egypro.2015.02.171

Cited by 29 publications

(8 citation statements)

References 5 publications

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“…The researchers studied the battery-free solar independent photovoltaic refrigeration system to eliminate the use of batteries and charging controllers and their associated economic and environmental problems. El-Bahloul et al [21] conducted experimental studies on solar DC vapour compression refrigerators with/without phase change energy storage materials in dry hot areas, and the results showed that COP was higher without phase change energy storage materials, but when there was a lack of solar radiation, the temperature in the refrigerator changed rapidly due to the absence of phase change energy storage materials and other compensations; when the refrigerator with phase change energy storage materials operates at full load outdoors, the COP is 1.22. Mishra et al [22] constructed an independent photovoltaic cold storage system using a split household air conditioner, and the refrigerator was integrated with sensors based on the Internet of Things for remote monitoring of temperature, humidity, and stored items; the average annual utilization rate of 10-ton cold storage in India is 70% and the payback period is 2.1 years.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

Liang¹,

Wang³

et al. 2022

International Journal of Photoenergy

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An independent solar photovoltaic (PV) refrigerated warehouse system with ice thermal energy storage is constructed in this paper. In this system, the vapour compression refrigeration cycle is directly driven by a PV array, and the frequency of the compressor varies with the solar radiation intensity. The refrigeration performance and the matching characteristics of the system driven by different PV capacities are studied. The results show that the intensity of solar radiation required for the compressor to work at the same frequency decreases by approximately 7.8% when the ratio of PV capacity to compressor-rated power increases by 10%, and the time required for the temperature in the refrigerated warehouse to drop from ambient temperature to 0°C is reduced by 32 min on average. The energy efficiency ratio of the vapour compression refrigeration subsystem and the coefficient of performance (COP) of the refrigerated warehouse system increase with the ratio of PV capacity to compressor-rated power α. When α increases from 1 to 1.3, the growth rate of the COP is very slow. For the PV direct-drive refrigerated warehouse system with a compressor-rated power of 4.4 kW, the suitable ratio of PV capacity to compressor-rated power α is about 1.3. When the refrigerated warehouse system is driven directly by a 5.4 kW PV array, the overall COP is approximately 0.19. In the cycle mode of refrigeration and cold energy storage during the day and cold energy release at night, the stored cold energy can still meet the refrigeration required by the load for 48 hours after eight days of continuous operation. According to the current market price of cold storage, during the service life of the system, the income per unit volume of cold storage is about 2.2 times the investment.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

Liang¹,

Wang³

et al. 2022

International Journal of Photoenergy

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“…Some studies investigated solar-powered refrigerator performance with thermal heat storages. Bahloul et al (El-Bahloul, Ali, and Ookawara 2015) experimentally investigated the performance of the solar-powered refrigerator. They tested the unit for 23 days and announced that for setting temperature of 0°C, average COP value was found to be 1.22.…”

Section: Introductionmentioning

confidence: 99%

Development and testing of a PCM enhanced domestic refrigerator with use of miniature DC compressor for weak/off grid locations

Riffat

Kutlu

Tapia-Brito

et al. 2021

International Journal of Green Energy

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This paper presents the development of a sustainable and affordable domestic refrigerator for rural areas where grid setting is weak or non-existent. The refrigerator uses a miniature refrigeration unit based on a micro direct current (DC) compressor, which can adjust its speed according to photovoltaic output variation with solar radiation intensity, in order to maximize cooling production. The experimental investigation aims to define the cooling capacity management of the refrigerator through the use of phase change materials (PCMs). PCM packs in the fridge are charged during the period of high solar radiation and, afterward, melting of PCM releases cooling to maintain a cold temperature for extra hours when solar radiation is low or not available. The paper presents the design and construction of an experimental refrigerator with a miniature refrigeration unit of a finned tube heat exchanger for the fridge cabinet; PCM selection and, particularly, the effect of heat transfer enhancement at the condenser are discussed. Lab-scale tests were carried in the UK and field tests were carried out in Ghana in a collaboration project. In lab-scale tests, it is found that a condenser modification can decrease the transient power consumption by up to 26%. In contrast, the field-testing results show that the daily power consumption can be reduced only from 0.9 to 0.84 kWh. Additionally, field testing results show that the cabinet temperature of the PCM-enhanced refrigerator rose from 7°C to 11°C after a period of 5 hr power outage.

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“…The experimental results showed that the system could produce 4.5 and 17 kg of ice per day at a solar insolation of 3 and 7.3 kWh.m -2 , respectively. El-Bahloul et al (2015) experimentally studied the performance of a solar PV driven refrigerator (50 L) operating with a DC compressor and HFC-134a refrigerant. Experiments were conducted to analyze the effects of thermal energy storage (TES) inclusion in the system.…”

Section: Introductionmentioning

confidence: 99%

A novel solar-powered milk cooling refrigeration unit with cold thermal energy storage for rural application

Sidney¹,

Prabakaran

Kim

et al. 2021

Environ Sci Pollut Res

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This experimental study analyzed the use of solar photovoltaic energy for operating a novel twin-circuit DC milk chiller without batteries using water-based cold thermal energy storage for different seasons in Chennai, India. HFC-134a and HC-600a were used as refrigerants in the two individual circuits. For each season, the test was conducted continuously for 18 days to analyze the quantity of generated ice that could be utilized to chill 10 L of milk in the morning and in the evening. The average quantity of ice formed per day in the ice bank during monsoon, winter, and summer seasons was found to be 3.61, 19.75, and 27.97 kg, respectively. Thus, it is evident that the use of solar energy with thermal energy storage is effective for operating the milk chilling unit for two seasons, namely winter and summer. However, the system requires an additional power source for continuous operation during the monsoon season. In this study, solar photovoltaic power was observed to be a good choice for chilling milk in the context of global warming and energy consumption. The use of thermal energy storage also allows the initial cost to be reduced.

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Performance and Sizing of Solar Driven dc Motor Vapor Compression Refrigerator with Thermal Storage in Hot Arid Remote Areas

Cited by 29 publications

References 5 publications

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

Analysis of the Refrigeration Performance of the Refrigerated Warehouse with Ice Thermal Energy Storage Driven Directly by Variable Photovoltaic Capacity

Development and testing of a PCM enhanced domestic refrigerator with use of miniature DC compressor for weak/off grid locations

A novel solar-powered milk cooling refrigeration unit with cold thermal energy storage for rural application

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