Enhanced thermal performance analysis of buried heat transfer tubes thermal storage system filled with microcapsule particles

2020 ◽  
Vol 44 (13) ◽  
pp. 10414-10429
Author(s):  
Yun Liu ◽  
Tian‐tian Chen ◽  
Yue Dong ◽  
Yong‐Hua Li ◽  
Da‐Wen Zhong
Keyword(s):  
Heat Transfer ◽  
Performance Analysis ◽  
Thermal Performance ◽  
Storage System ◽  
Thermal Storage

Heat Transfer Characterization and Optimization of Latent Heat Thermal Storage System Using Fins for Medium Temperature Solar Applications

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Asmita Shinde ◽  
Sankalp Arpit ◽  
Pramod KM ◽  
Peddy V C. Rao ◽  
Sandip K. Saha
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Latent Heat ◽  
Optimum Design ◽  
Thermal Performance ◽  
Storage System ◽  
Thermal Storage ◽  
Solar Thermal ◽  
Medium Temperature ◽  
Fin Thickness

While solar thermal power plants are increasingly gaining attention and have demonstrated their applications, extending electricity generation after the sunset using phase change material (PCM) still remains a grand challenge. Most of the organic PCMs are known to possess high energy density per unit volume, but low thermal conductivity, that necessitates the use of thermal conductivity enhancers (TCEs) to augment heat transfer within PCM. In this paper, thermal performance and optimization of shell and tube heat exchanger-based latent heat thermal energy storage system (LHTES) using fins as TCE for medium temperature (<300 °C) organic Rankine cycle (ORC)-based solar thermal plant are presented. A commercial grade organic PCM, A164 with melting temperature of 168.7 °C is filled in the shell side and heat transfer fluid (HTF), Hytherm 600 flows through the tubes. A three-dimensional numerical model using enthalpy technique is developed to study the solidification of PCM, with and without fin. Further, the effect of geometrical parameters of fin, such as fin thickness, fin height, and number of fin on the thermal performance of LHTES, is studied. It is found that fin thickness and number of fin play significant role on the solidification process of PCM. Finally, the optimum design of the fin geometry is determined by maximizing the combined objective of HTF outlet temperature and solid fraction of PCM at the end of the discharging period. The latent heat thermal storage system with 24 fins, each of 1 mm thickness and 7 mm height, is found to be the optimum design for the given set of operating parameters.

scholarly journals Thermal Calculation and Experimental Investigation of Electric Heating and Solid Thermal Storage System

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5241
Author(s):  
Haichuan Zhao ◽  
Ning Yan ◽  
Zuoxia Xing ◽  
Lei Chen ◽  
Libing Jiang
Keyword(s):  
Heat Transfer ◽  
Calculation Method ◽  
Heat Storage ◽  
Storage System ◽  
Electric Heating ◽  
Thermal Storage ◽  
Thermal Design ◽  
Thermal Calculation ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics

Electric heating and solid thermal storage systems (EHSTSSs) are widely used in clean district heating and to flexibly adjust combined heat and power (CHP) units. They represent an effective way to utilize renewable energy. Aiming at the thermal design calculation and experimental verification of EHSTSS, the thermal calculation and the heat transfer characteristics of an EHSTSS are investigated in this paper. Firstly, a thermal calculation method for the EHSTSS is proposed. The calculation flow and calculation method for key parameters of the heating system, heat storage system, heat exchange system and fan-circulating system in the EHSTSS are studied. Then, the instantaneous heat transfer characteristics of the thermal storage system (TSS) in the EHSTSS are analyzed, and the heat transfer process of ESS is simulated by the FLUENT 15 software. The uniform temperature distribution in the heat storage and release process of the TSS verifies the good heat transfer characteristics of the EHSTSS. Finally, an EHSTSS test verification platform is built and the historical operation data of the EHSTSS is analyzed. During the heating and release thermal process, the maximum temperature standard deviation of each temperature measurement point is 28.3 °C and 59 °C, respectively. The correctness of the thermal calculation of the EHSTSS is thus verified.

Performance analysis on the liquid-ice thermal storage system for optimum operation

2002 ◽  
Vol 25 (2) ◽  
pp. 267-277 ◽  
Author(s):  
Masahiko Yamada ◽  
Shoichiro Fukusako ◽  
Tsuyoshi Kawanami
Keyword(s):  
Performance Analysis ◽  
Storage System ◽  
Thermal Storage ◽  
Optimum Operation
Sign in / Sign up

Export Citation Format

Share Document