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Research Papers: Energy Systems Analysis

Experimental Investigation of the Effect of Nanofluid on Thermal Energy Storage System Using Clathrate

[+] Author and Article Information
M. A. M. Hassan

Mechanical Power Engineering Department,
Faculty of Engineering,
Helwan University,
Mataria, Cairo 11718, Egypt
e-mail: marmdtu@yahoo.com

H. M. Abdel-Hameed

Mechanical Power Engineering Department,
Faculty of Engineering,
Helwan University,
Mataria, Cairo 11718, Egypt
e-mail: Hala_Ahmed@m-eng.helwan.edu.eg

Osama E. Mahmoud

Mechanical Power Engineering Department,
Faculty of Engineering,
Helwan University,
Mataria, Cairo 11718, Egypt
e-mail: Osama_ismail@m-eng.helwan.edu.eg

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received April 19, 2018; final manuscript received November 9, 2018; published online November 30, 2018. Assoc. Editor: Esmail M. A. Mokheimer.

J. Energy Resour. Technol 141(4), 042003 (Nov 30, 2018) (8 pages) Paper No: JERT-18-1279; doi: 10.1115/1.4042004 History: Received April 19, 2018; Revised November 09, 2018

Climatic change illustrates the need to new policy of load management. In this research, a special design of thermal energy storage (TES) system, with an appropriate storage medium that is suitable for residential and commercial buildings has been constructed and commissioned. Direct contact heat transfer is a significant factor to enhance the performance of TES. Numerous experimental runs were conducted to investigate the clathrate formation and the characteristics of the proposed TES cooling system; in addition, the effect of using nanofluid particles Al2O3 on the formation of clathrate under different operating parameters was evaluated. The experiments were conducted with a fixed amount of water 15 kg, mass of refrigerant to form clathrate of 6.5 kg, nanofluid particles concentration ranged from 0.5% to 2% and the mass flux of refrigerant varied from 150 to 300 kg/m2 s. The results indicate that there is a significant effect of using nanoparticles concentration on the charging time of the clathrate formation. The percentage of reduction in charging time of about 22% was achieved for high nanoparticles concentration. In addition, an enhancement in charging time by increasing the refrigerant flow rate reaches 38% when the mass flux varied from 200 to 400 kg/m2 s. New correlation describing the behavior of the temperatures with the charging time at different nanoparticles concentrations is presented.

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Figures

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Fig. 1

The quadruple point of R-134a

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Fig. 2

The schematic diagram of the experimental test-rig

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Fig. 3

The thermocouple distribution within the storage tank

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Fig. 4

Storage media thermal behavior during cycle operation at different nanofluid concentration with refrigerant mass flux 150 kg/m2·s

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Fig. 5

Storage media thermal behavior during cycle operation at different nanofluid concentration with refrigerant mass flux 230 kg/m2·s

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Fig. 6

Storage media thermal behavior during cycle operation at different nanofluid concentration with refrigerant mass flux 300 kg/m2·s

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Fig. 7

Storage media thermal behavior during complete cycle operation

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Fig. 8

Storage media thermal behavior during complete cycle operation

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Fig. 9

Pressure variation during charging process

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Fig. 10

Variation of compression ratio and volumetric efficiency during charging process

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Fig. 11

Variation of compressor power and cooling load charging process

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Fig. 12

Variation of COP during charging process

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