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Research and Design of Cross Flow Water Turbines for Small HPP [PDF]

open access: yesE3S Web of Conferences, 2021
This paper presents the experience of the Hydroaerodynamics and hydraulic machinery department of the Technical university of Sofia (Bulgaria) in the research and design of cross flow water turbines.
Obretenov Valentin, Tsalov Tsvetan
doaj   +1 more source

Programmable microfluidics for dynamic multiband camouflage

open access: yesMicrosystems & Nanoengineering, 2023
Achieving multiband camouflage covering both visible and infrared regions is challenging due to the broad bandwidth and differentiated regulation demand in diverse regions.
Chunzao Feng   +6 more
doaj   +1 more source

Broadband light management in hydrogel glass for energy efficient windows

open access: yesFrontiers of Optoelectronics, 2022
Windows are critically important components in building envelopes that have a significant effect on the integral energy budget. For energy saving, here we propose a novel design of hydrogel-glass which consists of a layer of hydrogel and a layer of ...
Jia Fu   +5 more
doaj   +1 more source

Interaction between two horizontal axis tidal turbines in model scale – experiment and simulation

open access: yesInternational Marine Energy Journal, 2022
Up to 6 Schottel Instream Turbines (SIT250) can be mounted on the tidal platform PLAT-I developed by Sustainable Marine Energy. Due to the close proximity of the turbines interactions can occur between them.
Simon Joßberger   +4 more
doaj   +1 more source

A Study of a Darrieus Vertical Axis Wind Turbine with a guiding nozzle [PDF]

open access: yesE3S Web of Conferences, 2020
This paper presents the results from an experimental study of a Vertical Axis Wind turbine model with a guiding nozzle. The geometry of the nozzle is synthesized by an original methodology.
Obretenov Valentin, Tliev Rossen
doaj   +1 more source

The Effect of Suction Side Tubercles on Torque Output of a Steam Turbine Low-Pressure Last Stage Blade

open access: yesEnergies, 2020
Flow separation and different kinds of stall flows occur under low load conditions for steam turbine last stage blades. In order to delay the flow separation and increase turbine power production, we applied suction side tubercles on steam turbine low ...
Jing Zhang   +5 more
doaj   +1 more source

Monitoring Pumping Units by Convolutional Neural Networks for Operating Point Estimations

open access: yesEnergies, 2023
To avoid the failure of pumping units, the monitoring of operating points with a subsequent assessment of the condition of the pump may support the decision for required maintenance.
Hanbing Ma   +2 more
doaj   +1 more source

Water and carbon footprints for Vidraru hydropower development, Romania [PDF]

open access: yesE3S Web of Conferences
Although the important positive effects that lakes have ondevelopment at the regional level and beyond, they also have a negativeimpact related to the large amounts of water that they can consume byevaporation.
Dumitran Gabriela-Elena   +5 more
doaj   +1 more source

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