Results 171 to 180 of about 3,331,348 (385)

Supercharged topping rocket propellant feed system [PDF]

open access: yes, 1979
A rocket propellant feed system utilizing a bleed turbopump to supercharge a topping turbopump is presented. The bleed turbopump is of a low pressure type to meet the cavitation requirements imposed by the propellant storage tanks.
Ginsburg, A.   +2 more
core   +1 more source

Estimation of the GCV of Coal Using Real‐Time Plant Data

open access: yesEnergy Science &Engineering, EarlyView.
ABSTRACT Online or real‐time strategies of estimating the gross calorific value (GCV) of coal are still not fully explored in academic literature, even though both conventional and sophisticated offline methods for estimating the GCV are well described.
Lethukuthula Nokwazi Vilakazi   +1 more
wiley   +1 more source

Operating Characteristics of a Wave-Driven Plasma Thruster for Cutting-Edge Low Earth Orbit Constellations

open access: yesInventions
This paper outlines the development phases of a wave-driven Helicon Plasma Thruster for cutting-edge Low Earth Orbit (LEO) constellations. The two-stage ambipolar electric propulsion (EP) system combines the efficient ionization of an ultra-compact ...
Anna-Maria Theodora Andreescu   +6 more
doaj   +1 more source

Performance Analysis of a Cooling‐Heating‐Electricity‐Ammonia Multigeneration System Integrated Concentrated Photovoltaic Photothermal and Operation Strategy

open access: yesEnergy Science &Engineering, EarlyView.
This article introduces an operation strategy utilizing a hydrogen and biomass collaborative energy storage to regulate the power supply and demand. The results show that the system achieves annual average energy and exergy efficiencies of 87.77% and 67.16%, respectively.
Kai Ding, Ximin Cao, Yanchi Zhang
wiley   +1 more source

Flow-based analysis of storage usage in a low-carbon European electricity scenario

open access: yes, 2018
The application of the flow tracing method to power flows in and out of storage units allows to analyse the usage of this technology option in large-scale interconnected electricity systems.
Brown, Tom   +4 more
core   +1 more source

Economic and Technical Assessment of Wind Potential Using SARIMAX Time Series Models: Wind Speed Forecasting and Analysis

open access: yesEnergy Science &Engineering, EarlyView.
The wind energy potential of Khaf was evaluated for 2025 using 15 years of wind data combined with advanced forecasting models, SARIMAX and Prophet. This integrated framework enables precise estimation of wind power density and optimal turbine selection, paving the way for the efficient and sustainable development of wind farms in the region.
Mohammad Amin Valizadeh   +3 more
wiley   +1 more source

Experimental Thrust and Specific Impulse Analysis of Pulsed Detonation Combustor

open access: yesApplied Sciences
Detonation combustion represents a significant advancement in efficiency over traditional deflagration methods. This paper presents a Pulsed Detonation Combustor (PDC) model that is designed with an aerodynamic mixing chamber featuring Hartmann–Sprenger ...
Andrei Vlad Cojocea   +3 more
doaj   +1 more source

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