Results 11 to 20 of about 12,803 (207)

A Monolithically Integrated Silicon Modulator with a 10Gb/s 5Vpp or 5.6Vpp Driver in 0.25µm SiGe:C BiCMOS

open access: yesFrontiers in Physics, 2014
This paper presents as a novelty a fully monolithically integrated 10Gb/s silicon modulator consisting of an electrical driver plus optical phase modulator in 0.25µm SiGe:C BiCMOS technology on one chip, where instead of a SOI CMOS process (only MOS ...
Bernhard eGoll   +9 more
doaj   +1 more source

The Method of the Working Fluid Selection for Organic Rankine Cycle (ORC) Systems Employing Volumetric Expanders

open access: yesEnergies, 2020
The working fluid selection is one of the most important issues faced when designing Organic Rankine Cycle (ORC) systems. The choice of working fluid is dictated by different criteria.
Piotr Kolasiński
doaj   +1 more source

A Geothermal-Solar Hybrid Power Plant with Thermal Energy Storage

open access: yesEnergies, 2020
The concept of a geothermal-solar power plant is proposed that provides dispatchable power to the local electricity grid. The power plant generates significantly more power in the late afternoon and early evening hours of the summer, when air ...
Brady Bokelman   +2 more
doaj   +1 more source

Coupling mechanism of double-stage ORC based on hot dry rock utilization

open access: yesCase Studies in Thermal Engineering, 2021
For the purpose of effectively utilizing dry hot rock resource, the coupling mechanism of the double-stage Organic Rankine Cycle (ORC) power generation system is probed in present work. Six kinds of organic working fluids are employed in proposed system.
Xueling Liu   +4 more
doaj   +1 more source

Instrumentation for Simultaneous Non-Destructive Profiling of Refractive Index and Rare-Earth-Ion Distributions in Optical Fiber Preforms

open access: yesInstruments, 2018
We present a non-destructive technique for a combined evaluation of refractive index and active-dopant distribution in the same position along a rare-earth-doped optical fiber preform.
Marilena Vivona, Michalis N. Zervas
doaj   +1 more source

Evaluation of Using Gas Turbine to Increase Efficiency of the Organic Rankine Cycle (ORC)

open access: yesEnergies, 2020
Power conversion systems based on the Organic Rankine Cycle (ORC) have been identified as a potential technology especially in converting low-grade renewable sources or waste heat. However, it is necessary to improve efficiency of ORC systems. This paper
Dominika Matuszewska, Piotr Olczak
doaj   +1 more source

Thermodynamic Optimization of Advanced Organic Rankine Cycle Configurations for Geothermal Energy Applications

open access: yesEnergies, 2022
The Organic Rankine Cycle (ORC) is commonly accepted as a viable technology to convert from low to medium temperature geothermal energy into electrical energy.
Nenad Mustapić   +3 more
doaj   +1 more source

Comparison of waste heat recovery from a Proton Exchange Membrane fuel cell by gas turbine or Organic Rankin Cycle: a display of 3E analysis [PDF]

open access: yesHydrogen, Fuel Cell & Energy Storage, 2021
One of the most important methods for efficient hydrogen utilization is the proton exchange membrane fuel cell (PEMFC) because of its low environmental impact and easy maintenance.
Vahid Mohammadzadeh   +3 more
doaj   +1 more source

Advance Exergo-Economic Analysis of a Waste Heat Recovery System Using ORC for a Bottoming Natural Gas Engine

open access: yesEnergies, 2020
This manuscript presents an advanced exergo-economic analysis of a waste heat recovery system based on the organic Rankine cycle from the exhaust gases of an internal combustion engine. Different operating conditions were established in order to find the
Guillermo Valencia Ochoa   +2 more
doaj   +1 more source

Off-Design Modelling of ORC Turbines for Geothermal Application [PDF]

open access: yesE3S Web of Conferences, 2021
In this study, turbine modelling of a geothermal sourced organic Rankine cycle (ORC) power plant is aimed. Thermodynamic model of the plant is constructed with the help of design and off-design plant data from an existing two-cycle power plant in ...
Ungar Pietro   +4 more
doaj   +1 more source

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