Zero-cooling energy thermoelectric system by phase change material heat sink …
(6), using the metal foam enhances the heat transfer rate in the PCM box and make more effectual heat sink by improving thermal conductivity and rate of thermal storage in the energy storage box. The PCM melting process was completed in the system with PCM-Cu heat sink even under the low heat load before the TEG reached the critical …
A fiber laser welding of plastics assisted by transparent solid heat sink to prevent the surface thermal damages …
This paper deals with an innovative fiber laser welding method for engineering plastics assisted by a solid heat sink transparent to the laser beam for preventing any thermal damage on the surface. The features of this fiber laser welding procedure are (1) to place a ...
Trailing heat sink effects on residual stress and distortion of pulsed laser welded …
The intense cooling action of the trailing heat sink at some distance behind the laser beam is also modeled in finite element analysis, and the average heat transfer coefficient h of the forced convective heat transfer between the water jet and the sample bottom surface can be calculated from the following equation used by Li et al. (2004a): (2) …
Effect of Heat Sink and Cooling Mediums on Ferrite …
In this work, the effect of aluminium heat sink and varying cooling medium on the laser welding of duplex stainless steel (DSS) 2205 is studied. The 2 mm thick DSS sheets welded with pulsed Nd: YAG laser …
Investigation on heat transfer performance of a novel active method heat sink to maximize the efficiency of thermal energy storage …
The equation of energy including heat flux defines as follow: (10) ρ C p u · ∇ T = k ∇ 2 T + q w where q w is the uniform heat flux density of the heat sink''s root. Positive charge mobility of the transformer oil is lower than negative ones.
Numerical simulation and experimental investigation of temperature and residual stresses in GTAW with a heat sink …
As a post-weld stress mitigation technique, last pass heat sink welding (LPHSW) is able to convert tensile residual stresses to compressive stresses of nearly equal magnitude. The finite element method (FEM) has been used since the early 1970s to predict stresses and deformations resulting from welding processes ( Hibbit and Marcal, 1973 ).
Low-cost energy storage and energy sink technologies
The crucial requirement here is a low-cost storage medium, meaning solutions are needed that favor heat storage and high-energy density fuel production vs. electrical energy storage in batteries. Examples of …
Development and Testing of an Energy Storage Material/Phase …
A concept of using energy storage material (ESM) or phase change material (PCM) to enhance the heat transfer dissipation by a conventional compact fin …
Demand reduction and energy saving potential of thermal energy storage integrated heat …
A heat pump (HP) moves heat from a low-temperature source to a high-temperature sink with an input of energy. Often, one temperature body fluctuates with time (e.g., diurnal ambient temperature), causing the HP efficiency to …
Heat transfer characteristics of thermal energy storage system using single and multi-phase cooled heat sinks…
Geometry and temperature distribution of studied pin-fin HS in [[70], [71] – 72] while (a) original heat sink and (b) Yang and Peng''s heat sink, (c) optimal heat sink. Chen et al. [73] investigated a numerical study with the aim of a concept pin-fin heat sink function optimization under uncertain environment using method of cell evolution.
Methodology for Designing a Hybrid Thermal Energy Storage …
A thermal response model for designing a hybrid thermal energy storage (TES) heat sink is developed. The stabilization time and maximum operating (hot side) …
Improving the performance of heat sinks through the integration of fins and the utilization of graphene-mixed latent heat energy storage ...
1. Introduction The performance of typical thermal systems is affected by the accumulation of heat during their operation. Recent technological advancements reduced the system''s size but gave rise to heat accumulation. Through literature [40], it is revealed that heat generation in a heat sink connected to an electronic chip increased from 50 …
Modular Heat Sinks for Enhanced Thermal Management of …
The use of smaller modular heat sinks (MHSs) strategically placed on high power dissipation areas of the PCB enables elimination of electrical potential difference, …
Transient thermal performance using phase change material integrated topology optimized heat sinks …
The resultant optimal heat sink design was fabricated via additive manufacturing and exhibited better heat transfer performance with lower pumping power compared to benchmark heat sink designs. Recently, Pizzolato et al. [22] presented an approach combining density-based topology optimization and multi-phase computational …
Thermal energy storage: the role of the heat pipe in performance …
Heat pipes have been used extensively in a variety of energy storage systems. They are suited to thermal storage systems, in particular, in the role of heat …
Residual stresses in the welding joint of the nozzle-to-head area of a layered high-pressure hydrogen storage …
Three models with the welding heat input of 3.0 kJ/cm, 3.5 kJ/cm, and 4.0 kJ/cm were established to find the influence of heat input on the welding residual stresses, while the rest of the welding parameters were kept constant. Fig. 14 …
Heat transfer characteristics of thermal energy storage system …
Heat sinks are considered as heat exchangers employed to cool high-temperature devices such as electronic components. They can significantly improve heat …
A review on heat transfer enhancement techniques for PCM based thermal energy storage …
Effective thermal energy storage is crucial for various applications, and it requires various heat transfer enhancement techniques in PCM-based LHTES systems. The most common shortcoming of many phase change materials is their low thermal conductivity. To ...
Suppression of deformation and enhancement of weld properties in thin stainless steel using synchronous heat sink …
Therefore, it can be concluded that the ultrasonic + heat sink composite assisted welding scheme can achieve collaborative regulation of welding deformation and welding mechanical properties. The improvement of tensile strength of welds is closely related to the microstructure of welds, which satisfies the Hall-Patch fine grain …
Nanofluid-PCM heat sink for building integrated concentrated photovoltaic with thermal energy storage …
A new configuration of phase change material (PCM) heat sink has been developed to be combined with a building integrated concentrated photovoltaic (BICPV) system. This new proposed system includes PCM encapsulated in aluminum pack and immersed in nanofluid container to improve thermal conductivity..
Predicting the performance of a heat sink utilized with an energy …
Combining the Heat Sink (HS) with the Phase Change Materials (PCMs) is an innovative method that can be used for the temperature control of electronic boards [ 5 …
Reduction Characteristics of Welding Deformation According to Cooling Distance in Heat Sink Welding …
When assembling a welding structure, welding deformation occurs inevitably due to the locally applied heat source. This not only decreases the strength of the structure but also decreases productivity efficiency. In recent years, in-process control welding by an additional cooling source has been applied for thin-plate structures. In the …
Joining and welding with a nanothermite and exothermic bonding …
a particulate heat sink, to hold the energetic particles in reasonable proximity to each other as well as control the density of energy release and storage, providing a desired flame rate of combustion more amenable to joining and welding, bringing linear as ...
Experimental investigation for thermal performance of various heat sinks by alumina RT-70HC (NsPCM): Sustainable approach for thermal energy ...
Experimental investigation for thermal performance of various heat sinks by alumina RT-70HC (NsPCM): Sustainable approach for thermal energy storage applications Author links open overlay panel Imran Zahid a 1, Muhammad Farooq b h 1, Izza Anwer c, Muhammad Farhan b, M. Yasar Javaid a, M. Raza Lashari a, …
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The underlying mechanisms associated with welding-induced buckling distortions are investigated using finite element procedures. Unlike stable type of welding-induced distortions which can be adequately captured by performing a thermo-plasticity simulation of actual welding procedures, local buckling distortions in welded structures …
Reduction Characteristics of Welding Deformation According to …
Heat sink welding can minimize the plastic deformation of the weld because the temperature is rapidly reduced by the cooling effect of the cooling medium …
Thermal optimization of PCM based pin fin heat sinks: An experimental study …
The value of ( 1 + ψ) for 120 pin fins corresponds to 1.15. From the experimental study, it is evident that as the number of pin fins is increased there is a penalty in the PCM volume, causing the performance of the heat sink to deteriorate. In view of this, a value of 1.2 is given as the upper bound for 1 + ψ.
Latent heat energy storage using nanomaterials as a heat sink for the prevention of thermal runaway: A study in conjugate heat …
If the heat sink is not ducted, the heat flow will be forced to bypass the heat sink. The flow properties of the working fluid are considered an essential factor while designing a heat sink. This study seeks to create heat sinks based on the typical dimensions of heat sinks used in portable electronic devices so that they can be …
Advances in thermal energy storage: Fundamentals and …
Thermal energy storage (TES) is increasingly important due to the demand-supply challenge caused by the intermittency of renewable energy and waste heat dissipation to the environment. This paper discusses the fundamentals and novel applications of TES materials and identifies appropriate TES materials for particular …
