Investigation of an Innovative Flat-Plate Integrated Collector-Storage Solar Water Heater with Latent Heat Storage

International Journal of Thermofluids, Journal Year: 2025, Volume and Issue: unknown, P. 101091 - 101091

Published: Jan. 1, 2025

Language: Английский

---

4E analysis of a flat plate solar collector using phase change material and rectangular channels

Applied Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 125641 - 125641

Published: Jan. 1, 2025

Language: Английский

---

Characterization and thermophysical property evaluation of ceramic and metal oxide-based hybrid nanoparticles enhanced paraffin PCM

Journal of Thermal Analysis and Calorimetry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Language: Английский

---

Design and Simulation of Flat Plate Collector With a Tube Rotation and Phase Change Materials Sn₃N₄‐LiNO₃‐KNO₃/Boron‐Arsenide for Enhanced Efficiency

Energy Storage, Journal Year: 2024, Volume and Issue: 6(8)

Published: Nov. 17, 2024

ABSTRACT Solar thermal energy is crucial in our transition to renewable sources. Recent studies have focused on enhancing the efficiency of solar collectors by minimizing loss during absorption. A promising approach involves an innovative design that integrates phase change materials (PCMs) and rotating tubes capture more effectively. Advanced nitride‐based salt hydrates, with boron‐arsenide additives, enhance performance collector. In a flat plate collector using composite PCMs, radiative heat decreases from 250 210 W (a 6% reduction) tube rotation, while convective drops 225 195 4% decrease). The decomposition rate novel PCMs low, measuring only 0.5% at maximum temperature 850°C, specific capacity up 4.50 W/m K. This unique blend, including Sn₃N₄‐LiNO₃‐KNO₃/boron arsenide mixture, enhances conductivity 30%, significantly improving absorption rates. exergy achieved Nano‐enhanced (NEPCM) rotation reaches impressive 90%. With 3 rad/min, collector's improves 22%, reaching overall 90% fluid flow 25 kg/h. Simulations Anaconda Jupyter Notebook Python validate effectiveness both NEPCM efficiency.

Language: Английский

---

Numerical Investigation of Solar Collector Performance with Encapsulated PCM: A Transient, 3D Approach

Energies, Journal Year: 2024, Volume and Issue: 17(21), P. 5243 - 5243

Published: Oct. 22, 2024

This study presents a comprehensive numerical investigation into the thermal performance of solar collectors integrated with encapsulated phase change materials (PCMs) using transient three-dimensional (3D) approach. The two distinct PCMs—paraffin wax and RT60—was evaluated under varying operational conditions, including seasonal variations, inlet pipe velocities, temperatures. results indicate that paraffin exhibits higher peak temperature, reaching approximately 360 K, compared to RT60’s 345 making more effective for consistent energy storage. Paraffin also maintained fluid fractions, maximum 0.9 in summer, indicating superior heat absorption retention capabilities. In contrast, RT60 demonstrated quicker transition, fully liquefying at lower fraction, which is advantageous rapid release. Seasonal variations significantly impacted system efficiency, highest efficiency observed June 365 K lowest December 340 K. found velocities (e.g., 0.25 L/s) improved retention, resulting outlet temperatures, while increasing temperature from 290 310 led marked increase temperatures throughout day. These findings underscore importance optimizing PCM selection, velocity, enhancing systems, offering quantitative insights contribute development efficient reliable renewable solutions.

Language: Английский

---

Modeling of Shell and Various Tube Shapes with Annular Fins for Thermal Solar Energy Storage System

E3S Web of Conferences, Journal Year: 2024, Volume and Issue: 589, P. 05004 - 05004

Published: Jan. 1, 2024

With increasing global interest in transitioning from old, expensive fossil fuels to clean energies, particularly solar energy, which is abundant most regions of the world, challenge arises storing energy generated during day for reuse at night. Therefore, many researchers have focused their efforts on developing and enhancing thermal storage systems energy. Phase change materials are considered suitable least when used systems, especially shell-and-tube heat exchangers. In this study, issue latent a shell exchanger was addressed using different tube shapes (tube, nozzle, reducer), surrounded by annular fins. The main objective simulate solidification process proposed models, represent state released into phase material night stored day. models were designed SolidWorks software. CFD technology, employing finite volume enthalpy methods, utilized with ANSYS-Fluent 19 software numerical simulations. results obtained predictions indicated that variation liquid fraction among minimal. model exhibited lower average than other suggesting faster paraffin compared others. upper part reducer model, where there less paraffin, temperature close wall surface temperature, similar nozzle model. reduction time achieved 25.7% while delayed approximately 16.3% Designing more process, whereas preferred melting process. There satisfactory agreement between published experimental findings.

Language: Английский

---

Effect of a novel hybrid nanomaterial in a porous PCM container on the solidification of water with radiative heat removal

Journal of Thermal Analysis and Calorimetry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 21, 2024

Language: Английский

---