Thermal Performance Evaluation of a Double-Tube Heat Exchanger Partially Filled with Porous Media Under Turbulent Flow Regime

2017 ◽  
Vol 120 (3) ◽  
pp. 449-471 ◽  
Author(s):  
Alireza Jamarani ◽  
Mehdi Maerefat ◽  
Nima F. Jouybari ◽  
Majid E. Nimvari
Keyword(s):  
Porous Media ◽  
Performance Evaluation ◽  
Heat Exchanger ◽  
Turbulent Flow ◽  
Flow Regime ◽  
Thermal Performance ◽  
Tube Heat Exchanger ◽  
Turbulent Flow Regime

Thermal performance analysis of plate fin arrays with hexagonal perforations under turbulent flow regime

2019 ◽  
Author(s):  
Imtiaz Taimoor ◽  
Md Lutfor Rahman ◽  
Nazneen Sultana Aankhy ◽  
Muzahid Bin Khalid
Keyword(s):  
Performance Analysis ◽  
Turbulent Flow ◽  
Flow Regime ◽  
Thermal Performance ◽  
Turbulent Flow Regime

Thermal Performance of Sensible Energy Storage Module Consisting of a Cementitious Matrix: The Effect of Operating Conditions

2020 ◽  
Author(s):  
Justin Caspar ◽  
Julio Bravo ◽  
Shuoyu Wang ◽  
Ahmed Abdulridha ◽  
Sudhakar Neti ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Energy Storage ◽  
Turbulent Flow ◽  
Flow Regime ◽  
Thermal Performance ◽  
Operating Conditions ◽  
Initial Time ◽  
Time Rate ◽  
Turbulent Flow Regime

Abstract The fluid flow and heat transfer inside a concrete thermal energy storage module is simulated for various heat transfer fluid flow rates and inlet temperatures. The storage performance of the module is characterized based on the volume-averaged temperature and normalized energy distribution through the block versus time. In the turbulent flow regime, induced mixing in the pipe strongly enhanced the performance of the module compared to the laminar regime. The block was able to fully charge and discharge in a turbulent flow regime, whereas that behavior was not present in the laminar flow regime. Varying the heat transfer temperature had an effect on the time rate of change of temperature as well as the charge times. As the thermal gradient increased, the initial time rate of temperature in the block increased as well as the charge time. Since the block has higher theoretical energy at a larger gradient, power over a longer duration is necessary to reach a saturation point. By characterizing the thermal performance of the module, the effect of material properties and operational parameters can be studied in order to design a module that can meet the needs of a power generation plant.

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