Heat storage in direct-contact heat exchanger with phase change material

2013 ◽  
Vol 50 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Takahiro Nomura ◽  
Masakatsu Tsubota ◽  
Teppei Oya ◽  
Noriyuki Okinaka ◽  
Tomohiro Akiyama
Keyword(s):  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Direct Contact ◽  
Heat Storage ◽  
Contact Heat ◽  
Direct Contact Heat Exchanger ◽  
Change Material

Performance analysis of heat storage of direct-contact heat exchanger with phase-change material

2013 ◽  
Vol 58 (1-2) ◽  
pp. 108-113 ◽  
Author(s):  
Takahiro Nomura ◽  
Masakatsu Tsubota ◽  
Akihito Sagara ◽  
Noriyuki Okinaka ◽  
Tomohiro Akiyama
Keyword(s):  
Heat Exchanger ◽  
Performance Analysis ◽  
Phase Change ◽  
Phase Change Material ◽  
Direct Contact ◽  
Heat Storage ◽  
Contact Heat ◽  
Direct Contact Heat Exchanger ◽  
Change Material

Heat release performance of direct-contact heat exchanger with erythritol as phase change material

2013 ◽  
Vol 61 (2) ◽  
pp. 28-35 ◽  
Author(s):  
Takahiro Nomura ◽  
Masakatsu Tsubota ◽  
Teppei Oya ◽  
Noriyuki Okinaka ◽  
Tomohiro Akiyama
Keyword(s):  
Heat Exchanger ◽  
Phase Change ◽  
Heat Release ◽  
Phase Change Material ◽  
Direct Contact ◽  
Contact Heat ◽  
Direct Contact Heat Exchanger ◽  
Change Material

Second-Law Efficiency of an Energy Storage-Removal Cycle in a Phase-Change Material Shell-and-Tube Heat Exchanger

1993 ◽  
Vol 115 (4) ◽  
pp. 240-243 ◽  
Author(s):  
Ch. Charach
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Tube Heat Exchanger ◽  
Shell And Tube ◽  
Change Material

This communication extends the thermodynamic analysis of latent heat storage in a shell-and-tube heat exchanger, developed recently, to the complete heat storage-removal cycle. Conditions for the cyclic operation of this system are formulated within the quasi-steady approximation for the axisymmetric two-dimensional conduction-controlled phase change. Explicit expressions for the overall number of entropy generation units that account for heat transfer and pressure drop irreversibilities are derived. Optimization of this figure of merit with respect to the freezing point of the phase-change material and with respect to the number of heat transfer units is analyzed. When the frictional irreversibilities of the heat removal stage are negligible, the results of these studies are in agreement with those developed recently by De Lucia and Bejan (1991) for a one-dimensional latent heat storage system.

scholarly journals Dynamic numerical study on phase change thermal storage heat transfer

2021 ◽  
Vol 25 (6 Part A) ◽  
pp. 4171-4179
Author(s):  
Jie Cui ◽  
Guofeng Wang ◽  
Zhitang Guo ◽  
Shuo Yang ◽  
Honggang Pan ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Phase Change ◽  
Phase Change Material ◽  
Heat Storage ◽  
Thermal Storage ◽  
Transfer Effect ◽  
Fin Spacing ◽  
Change Material

Targeted at the poor heat transfer effect of the phase change thermal storage heat exchanger due to the low thermal conductivity of the phase change material, a fin-tube type phase change thermal storage heat exchanger has been proposed in the study. A 2-D model of the phase-change heat storage unit was established, and the dynamic heat transfer law of the melting and solidification of the phase change material, and the influence of the fin structure size on the heat storage/release performance of the heat exchanger were numerically analyzed. The results show that in the area close to the tube wall, the smaller the fin spacing, the larger the thickness, the faster the phase change heat storage/release speed, and the better heat transfer effect. In the central area of the phase change material, the greater the fin spacing and thickness, and the better the heat transfer effect of the phase change heat storage/release. The area close to the outer wall has the smallest temperature change, and the heat storage/release effect is the worst. Therefore, the use of energy storage heat exchangers with gradual fin thickness and spacing is an effective method to improve the heat transfer efficiency of existing equipment. In addition, in order to improve the heat exchange effect of the edge area of the phase change, its structure could be changed or the heat exchange form can be increased.

Heat release characteristics of a latent heat storage heat exchanger by scraping the solidified phase change material layer

Energy ◽  
2020 ◽  
Vol 205 ◽  
pp. 118055 ◽  
Author(s):  
Nobuhiro Maruoka ◽  
Taichi Tsutsumi ◽  
Akihisa Ito ◽  
Miho Hayasaka ◽  
Hiroshi Nogami
Keyword(s):  
Heat Exchanger ◽  
Phase Change ◽  
Heat Release ◽  
Phase Change Material ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Material Layer ◽  
Change Material
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