The excellent enhanced heat transfer capability of CPCM-N(A) on the radial direction makes it an excellent potential for thermal management and can be used as a passive heat sink for heat dissipation of micro …
In this review, by comparing with sensible heat storage and chemical heat storage, it is found that phase change heat storage is importance in renewable energy …
Heat pipes and thermosyphons—devices of high effective thermal conductivity—have been studied for many years for enhancing the performance of solid, …
The heat is converted into internal energy and stored. The heat storage density is about 8–10 times that of sensible heat storage and 2 times that of phase change heat storage. The device is difficult to design because the reaction temperature is usually high [9]. The research is still in the laboratory stage.
Advanced heat transfer technologies are the key to tackling the big challenges of energy shortage, global warming, environmental issues, clean energy, energy storage …
Phase change materials (PCMs), as an effective thermal energy storage technology, provide a viable approach to harness solar heat, a green energy source, and optimize energy consumption in buildings. However, the obstacle preventing widespread practical use of PCM is its poor performance in terms of heat transfer and shape …
Although the rectangular fin structure has the lowest convective heat transfer coefficient, its heat transfer rate is slightly higher than the other structures due to its larger heat transfer area. At a wall temperature of 70℃, the convective heat transfer coefficient and heat transfer rate obtained by the pin fin configuration are respectively …
Abstract. In the process of industrial waste heat recovery, phase change heat storage technology has become one of the industry''s most popular heat recovery technologies due to its high heat storage density and almost constant temperature absorption/release process. In practical applications, heat recovery and utilization speed …
Nano-enhanced PCMs have found the thermal conductivity enhancement of up to 32% but the latent heat is also reduced by up to 32%. MXene is a recently developed 2D nanomaterial with enhanced electrochemical properties showing thermal conductivity and efficiency up to 16% and 94% respectively.
Afshin J. Ghajar. Advanced heat transfer technologies are the key to tackling the big challenges of energy shortage, global warming, environmental issues, clean energy, energy storage and sustainable development for human beings. Development and application of advanced heat transfer theory and knowledge are crucial in developing …
4 · This study presents a novel concentric shell-and-tube LHTES system, centered around a twisted elliptical inner tube with strategically spaced, non-uniform fins, as shown in Fig. 1 (b).The key design parameters include: an outer shell diameter (D) of 35 mm; the inner tube, a twisted elliptical shape with an oval cross-section, has a major axis (A) measuring …
However, thermal storage and release properties of the LHTES are limited for the low thermal conductivity of the PCMs, therefore, the performance enhancement of solar driven LHTES system has become a research hotspot in recent years. Panchabikesan et al. [14] found from the parametric study of PCMs and HTF that the inlet temperature of …
Thermal energy storage (TES) is increasingly important due to the demand-supply challenge caused by the intermittency of renewable energy and waste heat …
The energy is available to use when the process is repeated in the reversed mode. Latent heat storage (LHS) stocks energy in TES because of its …
A novel framework has been employed in various contemporary studies, to enhance heat transfer in heat exchangers through microchannels. A microchannel heat exchanger (MCHE) is a miniature heat exchanger that can address issues such as rapid increases in heat flux in small spaces, storage space constraints, and the need for …
In recent years, the development of electronic chips has focused on achieving high integration and lightweight designs. As a result, pulsating heat pipes (PHPs) have gained widespread use as passive cooling devices due to their exceptional heat transfer capacity. Nevertheless, the erratic pulsations observed in slug flow across …
In order to improve the thermal efficiency of an ice thermal energy storage system, Liu et al. [36] added fins to the surface of the MHPA to enhance heat transfer capability. Diao et al. [37] conducted an investigation into various parameters, including fluid temperature, cooling airflow size, and the number of MHPAs, with regard to the thermal …
As a new type of heat transport medium with high efficiency and high heat transfer performance, nanofluids can effectively improve the heat transfer performance of thermal systems. In this paper, a lattice Boltzmann method is employed to propose a novel thermal storage system with optimised nanoparticle distribution using spacer-separated …
Since diluted suspensions of nanoparticles were first called nanofluids and presented as viable solutions for heat transfer applications, this subject has received much attention and related investigations have expanded to many paths. In order to comprehend how nanoscale-related effects could influence the macroscopic transport …
The comparison of the heat transfer capabilities (convective heat transfer coefficients (h) or Nusselt numbers (Nu)) of commonly used BTMSs. As shown in the left part of Fig. 12, the heat transfer capability of two-phase flow boiling immersion cooling (TPFBIC) is superior, with the h about twice that of single-phase forced flow immersion cooling (SPFFIC) under …
When the latent heat thermal energy storage unit used the phase change material, which applied both bubble-driven flow and nanoparticles, the time for full charging reduced by up to 23.3 %. The average temperature …
Abstract. Nanofluids are colloidal mixtures of nanometric metallic or ceramic particles in a base fluid, such as water, ethylene glycol or oil. Nanofluids possess immense potential to enhance the ...
It is typically expressed as a percentage . A higher efficiency value indicates that more heat is being transferred, resulting in a more efficient system overall. To calculate the heat exchanger efficiency, you can use the formula: Efficiency = (Actual heat transfer rate / Maximum possible heat transfer rate) x 100.
In this review, by comparing with sensible heat storage and chemical heat storage, it is found that phase change heat storage is importance in renewable energy utilization, …
In comparison with sensible heat storage devices, phase change thermal storage devices have advantages such as high heat storage density, low heat dissipation loss, and good …
It summarizes the enhanced heat transfer measures of various types of phase change thermal storage devices and discusses the role of structural parameters in enhanced heat transfer. It is hoped that this Review will provide some references for scholars engaged in research on phase change thermal storage heat exchangers. 1.
Novel PCCs with CB and fins are proposed for photothermal conversion and storage. • The PCCs exhibit excellent light absorption and heat transfer capability. • The maximum photothermal conversion efficiency of the PCC is increased by 15.9 %. • …
Various enhancement techniques are proposed in the literature to alleviate heat transfer issues arising from the low thermal conductivity of the phase …
Supercapacitor is one type of ECs, which belongs to common electrochemical energy storage devices. According to the different principles of energy storage,Supercapacitors are of three types [9], [12], [13], [14], [15].One type stores energy physically and is ...
Liang Mei. Zhiyuan Zeng. Nature Reviews Chemistry (2024) The diverse and tunable surface and bulk chemistry of MXenes affords valuable and distinctive properties, which can be useful across many ...