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Energies, Volume 17, Issue 15

August-1 2024 - 259 articles

Cover Story: This feasibility study investigates extracting thermal energy from the Bedretto tunnel in the Swiss Alps. Our findings indicate that flowing water is the most effective heat source. Estimates indicate that the total extractable thermal energy ranges between 0.8 MWth and 1.5 MWth after reducing the water temperature to 4 °C via a heat pump. This study identifies the most suitable energy sourcing locations based on efficiency and investment costs. Cost analyses reveal that the investment in piping and heat pumps can be amortized within the equipment’s lifespan with appropriate economic models. With the same initial investments, district heating systems are viable in villages with over 30 connections. The payback periods are 10 years for 60 connections, 4.5 years for 90 connections, and immediate for 200 connections. View this paper
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Articles (259)

  • Review
  • Open Access
15 Citations
6,985 Views
17 Pages

Supercapacitor-Assisted Energy Harvesting Systems

  • Kasun Subasinghage and
  • Kosala Gunawardane

5 August 2024

Energy harvesting from energy sources is a rapidly developing cost-effective and sustainable technique for powering low-energy consumption devices such as wireless sensor networks, RFID, IoT devices, and wearable electronics. Although these devices c...

  • Article
  • Open Access
4 Citations
2,007 Views
18 Pages

5 August 2024

With the gradual emergence of trends such as the asynchronous interconnection of power grids and the increasing penetration of renewable energy, the issues of ultra-low-frequency oscillations and low-frequency stability in power grids have become mor...

  • Feature Paper
  • Article
  • Open Access
1 Citations
2,276 Views
15 Pages

5 August 2024

In this paper, a meticulous modeling approach is proposed not only for a fuel cell stack itself but also for all auxiliary components that collectively form the fuel cell system. This comprehensive modeling approach encompasses a wide range of compon...

  • Article
  • Open Access
2 Citations
1,482 Views
19 Pages

Dead-Time Free Modulation Scheme for IM Drive System Fed by Voltage Source Inverter

  • Qiwei Xu,
  • Liangwu Yi,
  • Xuehan Long,
  • Lingyan Luo and
  • Yiru Miao

5 August 2024

During the modulation process of the VSI motor drive system, the nonlinear errors caused by the dead-time and conduction voltage drop will increase the phase current harmonic distortion and the torque ripple. To solve this problem, a novel dead-time...

  • Article
  • Open Access
1,326 Views
17 Pages

5 August 2024

After the completion of in situ pyrolysis, oil shale can be used as a natural place for CO2 sequestration. However, the effects of chemical action and formation stress-state changes on the deformation of oil shale should be considered when CO2 is inj...

  • Article
  • Open Access
5 Citations
2,087 Views
17 Pages

5 August 2024

Wave energy conversion holds promise for renewable energy, but challenges like high initial costs hinder commercialization. Integrating wave-energy converters (WECs) into shore-protection structures creates dual-function structures for both electrici...

  • Article
  • Open Access
1,925 Views
23 Pages

Sustainable Energy Usage for Africa: The Role of Foreign Direct Investment in Green Growth Practices to Mitigate CO2 Emissions

  • Verena Dominique Kouassi,
  • Hongyi Xu,
  • Chukwunonso Philip Bosah,
  • Twum Edwin Ayimadu and
  • Mbula Ngoy Nadege

5 August 2024

In line with Africa’s commitment to keeping up with the United Nations Framework Convention on Climate Change, achieving a sustainable future requires balancing economic growth with environmental sustainability. This study investigates the long...

  • Article
  • Open Access
2 Citations
2,414 Views
21 Pages

5 August 2024

The rapid development of renewable energy presents challenges to the security and stability of power systems. Aiming at addressing the power system scheduling problem with load demand and wind power uncertainty, this paper proposes the establishment...

  • Article
  • Open Access
5 Citations
2,934 Views
13 Pages

On the Influence of Engine Compression Ratio on Diesel Engine Performance and Emission Fueled with Biodiesel Extracted from Waste Cooking Oil

  • Jasem Ghanem Alotaibi,
  • Ayedh Eid Alajmi,
  • Talal Alsaeed,
  • Saddam H. Al-Lwayzy and
  • Belal F. Yousif

5 August 2024

Despite the extensive research on biodiesels, further investigation is warranted on the impact of compression ratios on emissions and engine performance. This study addresses this gap by evaluating the effects of increasing the engine’s compres...

  • Article
  • Open Access
3 Citations
1,807 Views
17 Pages

4 August 2024

Natural gas hydrate (NGH) trials have been performed successfully with different development methods and gas recovery drainage technologies. Multiphase flow in a wellbore and the drainage of natural gas hydrate are two important parts for its whole e...

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Energies - ISSN 1996-1073