Performance analysis of static ice refrigeration air conditioning system driven by household distributed photovoltaic energy system

Xu, Yongfeng; Zhang, Fujun; Hassanien, Reda Hassanien Emam; Luo, Xianwu; Li, Guoliang; Li, Ming

doi:10.1016/j.solener.2017.09.002

Cited by 45 publications

(14 citation statements)

References 23 publications

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“…When ice formation commenced in the IBT, equivalent volume of water was discharged through the overflow tube due to the change in specific volume of the ice. This overflow water was used to determine the quantity of ice formed in the system, using the method adapted by Xu et al 26 and Han et al 27 The refrigerant side temperatures across all the components of the circuit, suction/discharge pressures and IBT temperature were logged into the computer through a data logging unit. After 24 h of experimentation, the ice in the IBT was allowed to melt and after it was brought to 30 C the next capillary lengths of 4.27 m, 4.57 m, and 4.88 m were subjected to similar tests.…”

Section: Methodsmentioning

confidence: 99%

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Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Sidney

Prabakaran

Lal

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this work, the thermal analysis on optimizing the capillary tube lengths of a dual circuit refrigeration system was carried out experimentally. Two refrigeration circuits were individually operated using two DC powered compressors (HFC-134a and HC-600a) instead of conventional AC powered compressors. The capillary tube optimization was done to maximize the coefficient of performance and exergy efficiency. From the results, it was found that the power consumption and the refrigerant mass flow rate decreases with the increase of capillary tube length for both the HFC-134a and HC-600a circuits, while the refrigeration capacity and coefficient of performance increased up to the capillary tube length of 4.57 m and then decreased. The maximum refrigeration capacity, ice formed, power consumption, and coefficient of performance experienced in the HC-600a circuit were 9.65%, 19.03%, 3.53%, and 7.34% lower than those of the HFC-134a circuit at the optimum capillary tube length. It was also found that at the optimum capillary length, the COP was maximum for the HFC-134a circuit while the exergy efficiency was maximum for the HC-600a circuit. The exergy efficiency of the HC-600a circuit was 11.13% higher than that of the HFC-134a circuit. At the optimum capillary tube length, the total equivalent warming impact values of the HFC-134a and HC-600a circuits were 961.13 kg CO2-eq and 785.77 kg CO2-eq, respectively.

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Section: Methodsmentioning

confidence: 99%

“…This overflow water was used to determine the quantity of ice formed in the system, using the method adapted by Xu et al. 26 and Han et al. 27 The refrigerant side temperatures across all the components of the circuit, suction/discharge pressures and IBT temperature were logged into the computer through a data logging unit.…”

Section: Experimental Facilitiesmentioning

confidence: 99%

Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Sidney

Prabakaran

Lal

2019

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…They also introduced a stratified water tank design that overcomes the common efficiency and energy storage problems. Xu et al (2017) studied an ice storage air conditioning system driven by solar energy.…”

Section: Literature Reviewmentioning

confidence: 99%

Utilizing the solar thermal ice storage system in improving the energy, exergy, economic and environmental assessment of conventional air conditioning system

ElHelw¹,

El‐Maghlany²,

Ismail³

2021

Preprint

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This paper introduces novel modification for conventional air conditioning systems through utilizing a thermal ice storage system integrated with solar panels. Alexandria and Aswan, cities in Egypt, are chosen to represent two climates for hot-humid and hot-dry climates respectively. The governing equations for both heat and mass transfer are theoretically solved. Exergy analysis is performed for the proposed solar-ice thermal storage system via determining exergy destruction on ice and solar components as well as the total destruction based on transient analysis. This study was carried out on two common types of air conditioning systems, an air handling unit and fan coil unit. Results showed that, solar-ice storage system is more effective approach in hot-humid climate than hot-dry climate and more efficient with all-water air conditioning system than with all-air conditioning system. The maximum energy saving is 205.16 GJ having a percent of 27.5% in August for all water system in case of Alexandria city and 224.67 GJ with a percent of 25.38% in August for all-water system in case of Aswan city. All air system simulation showed maximum energy saving of 175.05 GJ with a percent of 18.13 % in case of August for Alexandria and 175.45 GJ having a percentage of 17.43% in case of Aswan in August. Moreover, the all-water system achieved a reduction in CO2 emissions by 467 tons/year in Aswan city and 390 tons/year in case of Alexandria city. While these reductions decrease to be 435 and 353 tons/year when the all-air system used for the same two cities.

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“…When ice started to form in the IBT due to the expansion of ice, equivalent volume of water was pushed off through the overflow pipe and was collected in a measuring jar. The quantity of ice formed was determined using the quantity of measured overflow water the same method was adopted by Han et al 28 and Xu et al 29 All the experiments with different charge quantities were carried out for 24 hours. For each test initially the IBT was heated up to 30 C and the similar procedure was repeated for all charges.…”

Section: Experimentationmentioning

confidence: 99%

Charge optimisation of a solar milk chiller with direct current compressors

Sidney

Prabakaran

Lal

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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In view of promoting the utilization of solar photo-voltaic energy for milk chilling application a custom designed milk chiller with DC compressors was fabricated. Two different DC compressors were used operating with HFC-134a and HC-600a refrigerants to ascertain the performance of HFC and HC refrigerants when used in solar powered application. In view of optimizing the performance of both refrigerants, charge optimization was experimentally carried out for both refrigerant circuits. The optimum charge was obtained based on the maximum coefficient of performance and exergy efficiency. When comparing ice formation and coefficient of performance, the HC-600a refrigerant circuit was lower than that of HFC-134a circuit. It was also observed that the total exergy destruction experienced was maximum in the HFC-134a circuit than that of the HC-600a circuit. The magnitude of exergy destruction was found to be maximum in the compressor and then followed by the condenser, evaporator and finally the capillary for both refrigeration circuits. This study showed an efficient way for using the solar power for operating a milk chiller with DC compressors and with ice bank tank to avoid the dependency on batteries.

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Performance analysis of static ice refrigeration air conditioning system driven by household distributed photovoltaic energy system

Cited by 45 publications

References 23 publications

Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Thermal analysis on optimizing the capillary tube length of a milk chiller using DC compressor operated with HFC-134a and environment-friendly HC-600a refrigerants

Utilizing the solar thermal ice storage system in improving the energy, exergy, economic and environmental assessment of conventional air conditioning system

Charge optimisation of a solar milk chiller with direct current compressors

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