HEAT STORAGE ANALYSIS OF ENERGY PILES WITH SPIRAL-TUBE HEAT EXCHANGER BASED ON A PRACTICAL AXISYMMETRIC MODEL

2018 ◽  
Author(s):  
Qiang Zhao ◽  
Baoming Chen ◽  
Maocheng Tian ◽  
Fang Liu
Keyword(s):  
Heat Exchanger ◽  
Heat Storage ◽  
Spiral Tube ◽  
Axisymmetric Model ◽  
Tube Heat Exchanger ◽  
Energy Piles

Influence of spiral pitch on the thermal behaviors of energy piles with spiral-tube heat exchanger

2017 ◽  
Vol 125 ◽  
pp. 1280-1290 ◽  
Author(s):  
Qiang Zhao ◽  
Fang Liu ◽  
Chunwei Liu ◽  
Maocheng Tian ◽  
Baoming Chen
Keyword(s):  
Heat Exchanger ◽  
Thermal Behaviors ◽  
Spiral Tube ◽  
Tube Heat Exchanger ◽  
Energy Piles

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.

Heat Storage and Release Characteristics of Heat Storage Double Shell and Tube Heat Exchanger with Waste Heat Water Temperature

2018 ◽  
Vol 30 (10) ◽  
pp. 462-469
Author(s):  
Geunmyeun Jeong ◽  
Donghyun Kim ◽  
Donggyu Lee ◽  
Dong-Yeol Chung ◽  
Jong-Hyeon Peck ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Water Temperature ◽  
Heat Storage ◽  
Waste Heat ◽  
Tube Heat Exchanger ◽  
Shell And Tube

Mass transfer at the outer surface of a spiral tube heat exchanger in a stirred tank reactor and possible applications

2021 ◽  
Vol 165 ◽  
pp. 426-434
Author(s):  
Samah Mustafa ◽  
Mahmoud M. Taha ◽  
Ahmed A. Zatout ◽  
Gomaa H. Sedahmed ◽  
Dina A. El-Gayar
Keyword(s):  
Mass Transfer ◽  
Heat Exchanger ◽  
Outer Surface ◽  
Stirred Tank ◽  
Spiral Tube ◽  
Stirred Tank Reactor ◽  
Tube Heat Exchanger ◽  
Tank Reactor

Experimental and CFD investigation of spiral tube heat exchanger

2020 ◽  
Author(s):  
M. Vivekanandan ◽  
G. Saravanan ◽  
V. Vijayan ◽  
K. Gopalakrishnan ◽  
J. Phani Krishna
Keyword(s):  
Heat Exchanger ◽  
Spiral Tube ◽  
Tube Heat Exchanger

Flow and Cold Heat-Storage Characteristics of Phase-Change Emulsion in a Coiled Double-Tube Heat Exchanger

1995 ◽  
Vol 117 (2) ◽  
pp. 440-446 ◽  
Author(s):  
H. Inaba ◽  
S. Morita
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Heat Storage ◽  
Flow Behavior ◽  
Water Emulsion ◽  
Tube Heat Exchanger ◽  
The Heat Transfer Coefficient ◽  
Storage Characteristics

This paper dealt with the flow and cold heat-storage characteristics of the oil (tetradecane, C14H30, freezing point 278.9 K)/water emulsion as a latent heat-storage material having a low melting point. A coiled double-tube heat exchanger was used for the cold heat-storage experiment. The pressure drop, the heat transfer coefficient, and the finishing time of cold heat storage in the coiled tube were measured as experimental parameters. It was understood that the flow behavior of the emulsion as a non-New-tonian fluid had an important role in the present cold heat storage. The useful nondi-mensional correlation equations for the additional pressure loss coefficient, the heat transfer coefficient, and the cold heat storage time were derived in terms of modified Dean number and heat capacity ratio.

Sign in / Sign up

Export Citation Format

Share Document