A solid‐state solar‐powered heat transfer device

1979 ◽  
Vol 50 (9) ◽  
pp. 5682-5685 ◽  
Author(s):  
Milivoj Belić ◽  
Joel I. Gersten
Keyword(s):  
Heat Transfer ◽  
Solid State ◽  
Solar Powered ◽  
Transfer Device

Phase change heat transfer device for process heat applications

2010 ◽  
Vol 240 (10) ◽  
pp. 2409-2414 ◽  
Author(s):  
Piyush Sabharwall ◽  
Mike Patterson ◽  
Vivek Utgikar ◽  
Fred Gunnerson
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
Process Heat ◽  
Phase Change Heat Transfer ◽  
Transfer Device

scholarly journals CFD analysis of a heat transfer device integrated wind tower system for hot and dry climate

2013 ◽  
Vol 112 ◽  
pp. 576-591 ◽  
Author(s):  
John Kaiser Calautit ◽  
Ben Richard Hughes ◽  
Hassam Nasarullah Chaudhry ◽  
Saud Abdul Ghani
Keyword(s):  
Heat Transfer ◽  
Cfd Analysis ◽  
Transfer Device ◽  
Tower System

Thermal Conductivity Enhancement in a Latent Heat Storage Device

2013 ◽  
Vol 860-863 ◽  
pp. 590-593
Author(s):  
Cha Xiu Guo ◽  
Ding Bao Wang ◽  
Gao Lin Hu
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Solid State ◽  
Liquid Phase ◽  
Phase Change ◽  
Latent Heat ◽  
Heat Storage ◽  
Storage Device ◽  
Latent Heat Storage ◽  
Conductivity Enhancement

High conductivity porosity materials are proposed to enhance the phase change materials (PCM) in order to solve the problem of low conductivity of PCM in the latent heat storage device (LHSD), and two-dimensional numerical simulation is conducted to predict the performance of the PCM by CFD software. During the phase change process, the PCM is heated from the solid state to the liquid phase in the process of melting and from the liquid phase to the solid state in the solidification process. The results show that porosity materials can improve heat transfer rate effectively, but the effect of heat transfer of Al foam is superior to that of graphite foam although the heat storage capacity is almost the same for both. The heat transfer is enhanced and the solidification time of PCM is decreased since the effective thermal conductivity of composite PCM is increased.

Development and testing of a novel horizontal loop thermosyphon as a kW-class heat transfer device

2021 ◽  
pp. 117682
Author(s):  
Leonard Vasiliev ◽  
Alexander Zhuravlyov ◽  
Maxim Kuzmich ◽  
Vadzim Kulikouski
Keyword(s):  
Heat Transfer ◽  
Transfer Device

Unsteady CHT analysis of a solid state, sensible heat storage for PHES system

2019 ◽  
Vol 30 (6) ◽  
pp. 3199-3209 ◽  
Author(s):  
Bartosz Ziegler ◽  
Jędrzej Mosiężny ◽  
Paweł Czyżewski
Keyword(s):  
Heat Transfer ◽  
Energy Storage ◽  
Solid State ◽  
Conjugate Heat Transfer ◽  
Heat Storage ◽  
Sensible Heat ◽  
System Efficiency ◽  
Exergetic Efficiency ◽  
Key Factors ◽  
Content Type

Purpose The aim of this study is to identify key factors limiting efficiency of pumped heat energy storage systems and determine some general features of transient behavior of solid state, sensible heat storages. Moreover, it aimed at establishing a feasible approach to transient conjugate heat transfer (CHT) analyses for such applications. Design/methodology/approach A zero-dimensional analytical model is used to determine the system efficiency sensitivity to efficiency of its components. Analysis of argon gas flow in an exemplary configuration of layered bed thermal energy storage is presented. The analysis incorporates a unsteady reynolds averaged navier stokes model with conjugate heat transfer between gas and solid storage core. Findings It is established that exergetic efficiency of the heat storage is one of the key factors for the system’s overall performance. Three full cycles of storage charging and discharging having 17 h physical time in total are simulated, with calculation of exergetic efficiency for each of the cycles. From standpoint of the system efficiency, it is concluded that the presented heat storage kind has limited exergetic efficiency because of severe temperature drop at the solid–fluid interface in comparison to granular kind of heat storage devices. From the methodological standpoint, it is concluded that calculating the exergetic efficiency of the heat storage by direct computational fluid dynamics (CFD) analysis requires significant amount of walltime and computational resources. Originality/value The paper presents unconventional approach to using standard CFD tools by exploiting numerical diffusion to numerically suppress high-frequency solution oscillations. This strategy grants that the analysis, otherwise requiring impractically long computation walltime, is completed within a practical time.

A Numerical Model of a Reciprocating-Mechanism Driven Heat Loop for Two-Phase High Heat Flux Cooling

2016 ◽  
Vol 8 (4) ◽  
Author(s):  
Olubunmi Popoola ◽  
Ayobami Bamgbade ◽  
Yiding Cao
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Numerical Model ◽  
Performance Optimization ◽  
Numerical Study ◽  
High Heat ◽  
Working Fluid ◽  
High Heat Flux ◽  
Two Phase ◽  
Transfer Device

An effective design option for a cooling system is to use a two-phase pumped cooling loop to simultaneously satisfy the temperature uniformity and high heat flux requirements. A reciprocating-mechanism driven heat loop (RMDHL) is a novel heat transfer device that could attain a high heat transfer rate through a reciprocating flow of the two-phase working fluid inside the heat transfer device. Although the device has been tested and validated experimentally, analytical or numerical study has not been undertaken to understand its working mechanism and provide guidance for the device design. The objective of this paper is to develop a numerical model for the RMDHL to predict its operational performance under different working conditions. The developed numerical model has been successfully validated by the existing experimental data and will provide a powerful tool for the design and performance optimization of future RMDHLs. The study also reveals that the maximum velocity in the flow occurs near the wall rather than at the center of the pipe, as in the case of unidirectional steady flow. This higher velocity near the wall may help to explain the enhanced heat transfer of an RMDHL.

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