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Energies, Volume 18, Issue 6

March-2 2025 - 249 articles

Cover Story: Three-dimensional flexible solar fabrics based on hydrogenated amorphous silicon (a-Si:H) thin film solar cells were prepared and characterized. A glass fiber fabric with a polytetrafluoroethylene (PTFE) coating proved to be a suitable textile substrate. Interwoven metal wires enabled an integrated electrical interconnection. The best solar cells showed an efficiency of 3.9%, with an open-circuit voltage of 876 mV and a short-circuit current density of 11.4 mA/cm2. The high series resistance limited the fill factor to 39%. The potential of the textile solar cells was demonstrated by the pseudo fill factor of 79% achieved when neglecting the series resistance, resulting in a pseudo efficiency of 7.6%. When four textile solar cells were connected in a series, an open-circuit voltage of about 3 V was achieved. View this paper
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Articles (249)

  • Article
  • Open Access
864 Views
23 Pages

20 March 2025

The widespread deployment of distributed energy resources including volatile renewable generation raises the need for detailed distribution network analysis. In many cases, the vast system sizes make the joint analysis of multiple voltage levels comp...

  • Article
  • Open Access
1 Citations
753 Views
21 Pages

20 March 2025

This paper studies numerical simulations of the input-output behavior of a geothermal energy storage used in residential heating systems. There, under or aside of a building a certain domain is filled with soil and insulated from the surrounding grou...

  • Article
  • Open Access
2 Citations
802 Views
21 Pages

20 March 2025

In hub-motor electric vehicles (HMEVs), performance is adversely affected by the mechanical-electromagnetic coupling effect arising from deformations of the air gap in the Permanent Magnet Brushless Direct Current Motor (PM BLDC), which are exacerbat...

  • Article
  • Open Access
6 Citations
2,299 Views
28 Pages

20 March 2025

To fully recover abundant waste heat and reduce the operation cost in liquid-cooled data centers, a Carnot battery consisting of a heat pump (HP) and organic Rankine cycle (ORC) is proposed. Due to the existence of different cycle states for HPs and...

  • Article
  • Open Access
554 Views
15 Pages

20 March 2025

There are currently numerous types of water-flooding characteristic curves, most of which are derived from fundamental theories such as material balance, relative permeability, along with experimental results. A single exponential or power function e...

  • Article
  • Open Access
2 Citations
871 Views
25 Pages

Design and Analysis of a Quasi-Biaxial Solar Tracker

  • Yakang Liu,
  • Zhiquan Xiao,
  • Yu Huang,
  • Yubo Ma and
  • Zihan Yang

20 March 2025

Inspired by C. Alexandru, to achieve a balance between tracking accuracy and equipment cost and between single-axis tracking brackets and dual-axis tracking brackets, a kind of quasi-biaxial solar tracker, whose approximate two-axis motions are drive...

  • Article
  • Open Access
1 Citations
1,366 Views
31 Pages

20 March 2025

In recent years, rate of penetration (ROP) prediction using machine learning has attracted considerable interest. However, few studies have addressed ROP prediction uncertainty and its relation to training data and model inputs. This paper presents t...

  • Review
  • Open Access
1 Citations
1,884 Views
23 Pages

Review of Explosion Mechanism and Explosion-Proof Measures for High-Voltage Cable Intermediate Joints

  • Wei Qiu,
  • Chen Li,
  • Nianqiao Chen,
  • Yuhua Huang,
  • Zhibin Jiang,
  • Jiangjing Cui,
  • Peifeng Wang and
  • Gang Liu

20 March 2025

The intermediate joint of high-voltage cables, as a critical component in the power transmission system, plays a direct role in the stable operation of the entire electrical system. In recent years, frequent explosions of intermediate joints in high-...

  • Feature Paper
  • Article
  • Open Access
1 Citations
1,027 Views
19 Pages

20 March 2025

This study proposes a vertically stacked thermoelectric generator (TEG) design to enhance output power per unit volume. While the proposed TEG achieved improved conversion efficiency, the high inertia of the exhaust gas leads to significant flow mald...

  • Article
  • Open Access
1 Citations
973 Views
16 Pages

20 March 2025

The flow management of the gas–liquid mixture module is crucial for the transmission efficiency of crude oil-and-natural gas-gathering and transportation systems. The concurrent flow of high-viscosity crude oil and natural gas in gas–liqu...

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Energies - ISSN 1996-1073