Effects of non-uniform fin arrangement and size on the thermal response of a vertical latent heat triple-tube heat exchanger

2022 ◽  
Vol 45 ◽  
pp. 103723
Author(s):  
Ke Chen ◽  
Hayder I. Mohammed ◽  
Jasim M. Mahdi ◽  
Alireza Rahbari ◽  
Alasdair Cairns ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Thermal Response ◽  
Tube Heat Exchanger

scholarly journals Effect of Twisted Fin Array in a Triple-Tube Latent Heat Storage System during the Charging Mode

2021 ◽  
Vol 13 (5) ◽  
pp. 2685
Author(s):  
Mohammad Ghalambaz ◽  
Jasim M. Mahdi ◽  
Amirhossein Shafaghat ◽  
Amir Hossein Eisapour ◽  
Obai Younis ◽  
...  
Keyword(s):  
Energy Storage ◽  
Heat Exchanger ◽  
Latent Heat ◽  
Thermal Energy ◽  
Heat Storage ◽  
Hot Water ◽  
Melting Time ◽  
Latent Heat Storage ◽  
Tube Heat Exchanger ◽  
Storage Rate

This study aims to assess the effect of adding twisted fins in a triple-tube heat exchanger used for latent heat storage compared with using straight fins and no fins. In the proposed heat exchanger, phase change material (PCM) is placed between the middle annulus while hot water is passed in the inner tube and outer annulus in a counter-current direction, as a superior method to melt the PCM and store the thermal energy. The behavior of the system was assessed regarding the liquid fraction and temperature distributions as well as charging time and energy storage rate. The results indicate the advantages of adding twisted fins compared with those of using straight fins. The effect of several twisted fins was also studied to discover its effectiveness on the melting rate. The results demonstrate that deployment of four twisted fins reduced the melting time by 18% compared with using the same number of straight fins, and 25% compared with the no-fins case considering a similar PCM mass. Moreover, the melting time for the case of using four straight fins was 8.3% lower than that compared with the no-fins case. By raising the fins’ number from two to four and six, the heat storage rate rose 14.2% and 25.4%, respectively. This study presents the effects of novel configurations of fins in PCM-based thermal energy storage to deliver innovative products toward commercialization, which can be manufactured with additive manufacturing.

Quasi-stationary modelling of solidification in a latent heat storage comprising a plain tube heat exchanger

2018 ◽  
Vol 20 ◽  
pp. 551-559 ◽  
Author(s):  
A. Stamatiou ◽  
S. Maranda ◽  
F. Eckl ◽  
P. Schuetz ◽  
L. Fischer ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Tube Heat Exchanger ◽  
Plain Tube

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.

The latent heat recovery from boiler exhaust flue gas using shell and corrugated tube heat exchanger: A numerical study

Heat Transfer ◽  
2020 ◽  
Vol 49 (6) ◽  
pp. 3797-3815 ◽  
Author(s):  
Sharare Mohammadi ◽  
Seyed Soheil Mousavi Ajarostaghi ◽  
Mohsen Pourfallah
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Flue Gas ◽  
Heat Recovery ◽  
Numerical Study ◽  
Tube Heat Exchanger ◽  
Corrugated Tube

Influence of Convalescence on Soil Temperature Field around a Vertically Buried Single-U-Tube Ground Heat Exchanger

2011 ◽  
Vol 121-126 ◽  
pp. 1651-1655
Author(s):  
Zhen Yu Du ◽  
Yi Xing Zhang
Keyword(s):  
Temperature Field ◽  
Heat Exchanger ◽  
Soil Temperature ◽  
Moisture Transfer ◽  
Thermal Response ◽  
Geological Structure ◽  
Temperature Fields ◽  
Tube Heat Exchanger ◽  
Depth Direction ◽  
Single Well

The mathematical physical model of the heat and moisture transfer in the single-U-tube heat exchanger of a ground source heat pump (GSHP) is validated using observed data from the practical rock-soil thermal response test on a resident district in Taiyuan, the soil is layered according to the geological structure of an actual drill in the depth direction in this model. Inputting the dynamic design cooling and heating load of the district into the Realizable turbulent model in Fluent, the temperature fields of a single well in the GSHP project running for 1 year in 2 conditions in which convalescence is considered and not, are simulated numerically. It shows that it rather necessary to take the influence of convalescence into consideration while predicting the soil temperature field of a GSHP system running for a long term, or may not correspond to the reality and make a wrong theory guide to the practical engineering.

Effectiveness-NTU Charts for Heat Recovery From Latent Heat Storage Units

1980 ◽  
Vol 102 (4) ◽  
pp. 263-271 ◽  
Author(s):  
N. Shamsundar ◽  
R. Srinivasan
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Heat Storage ◽  
Solidification Rate ◽  
Three Dimensional ◽  
Coolant Temperature ◽  
Fluid Temperature ◽  
Latent Heat Storage ◽  
Tube Heat Exchanger ◽  
Design Calculations

The shell-and-tube heat-exchanger with a phase change material on the shell side is the subject of many investigations concerning latent heat storage. Many design calculations have been based on formulae that apply to one-dimensional solidification. In these calculations, axial changes in fluid temperature and solidification rate were neglected, and the coolant temperature was assumed constant. In the present paper, these restrictions are removed. It is shown that complete three-dimensional results can be obtained from the numerical results of a two-dimensional analysis by performing simple calculations. The results are presented in the form of charts giving the effectiveness of a heat-exchanger in terms of its size, the layout of the tubes, and the Biot number. The use of the charts in design is illustrated by numerical examples.

Modeling of solidification including supercooling effects in a fin-tube heat exchanger based latent heat storage

Solar Energy ◽  
2020 ◽  
Vol 200 ◽  
pp. 10-21 ◽  
Author(s):  
Remo Waser ◽  
Simon Maranda ◽  
Anastasia Stamatiou ◽  
Maurizio Zaglio ◽  
Joerg Worlitschek
Keyword(s):  
Heat Exchanger ◽  
Latent Heat ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Tube Heat Exchanger ◽  
Fin Tube
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