Nanoparticle enhanced PCM exergy loss and thermal behavior by means of FVM

By Y. Chu, N. Abu‐Hamdeh, B. Ben-Beya, M. Hajizadeh, Z. Li, Q. Bach. 2020

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Abstract Melting phenomena within a tank with various configurations of metallic fins with Y shape was performed by means of FVM. Fins are connected to hot surfaces. Nanomaterial as an additive dispersed in to paraffin to improve the melting process. Quicker melting can be obtained with use of NEPCM. Also, exergy loss was reported for various cases. Case 1 has lowest performance in view of liquid fraction (LF) and in comparison to 5th case, it has 15.8% lower performance. The best case in view of exergy loss is 4th case and Xd reduces about 73.7% with time augmentation. Reducing tendency of exergy drop is related to higher temperature of PCM with enhance of melt fraction. As expected, as LF augments, velocity of PCM enhances which provides greater Sgen,f. Regarding outcomes, the third case has greatest Sgen,f while the 4th case has minimum value of Sgen,f. Only the 3rd case has augmenting behavior with rise of time and other case has optimum point at t = 150 s. Sgen,th is reducing function of liquid fraction because converting solid to liquid provide greater temperature of PCM. The minimum of Sgen,th obtains for 4th case which is 1.59 time lower than 3rd case.

Subfields: Mechanical Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/b2508af1de217a421af4ea7b64e1707828c6b1e5