Results 111 to 120 of about 6,081 (269)
Parametric Design of an Ultrahigh-Head Pump-Turbine Runner Based on Multiobjective Optimization
Energies, 2017 Pumped hydro energy storage (PHES) is currently the only proven large-scale energy storage technology. Frequent changes between pump and turbine operations pose significant challenges in the design of a pump-turbine runner with high efficiency and ...
Linhai Liu +4 more
doaj +1 more source
Investigation of the influence of a step change in surface roughness on turbulent heat transfer [PDF]
The use is studied of smooth heat flux gages on the otherwise very rough SSME fuel pump turbine blades. To gain insights into behavior of such installations, fluid mechanics and heat transfer data were collected and are reported for a turbulent boundary ...
Coleman, Hugh W. +3 more
core +1 more source
MaimAir: A flexible and modular energy storage system for tomorrow energy banks [PDF]
, 2016 We considered a novel energy storage system based on the compression of air through pumped water. Differently from CAES on trial, the proposed indirect compression leaves the opportunity to choose the kind of compression from adiabatic to isothermal. The
Fargion, Daniele, Habib, Emanuele
core
Comparison of boiler feed pumps for cesium and potassium Rankine cycle systems [PDF]
, 1968 Comparison of electromagnetic and centrifugal pumps for cesium and potassium Rankine cycle ...
Clark, D. L. +2 more
core +2 more sources
Prediction of Energy Consumption and Energy Savings in an Urban Vertical Farm Benchmark
Energy Science &Engineering, EarlyView.This research conducted a comprehensive energy consumption analysis of a vertical farm benchmark integrating cultivation, storage, transportation and office functions. It proposed the adoption of small‐scale wind turbines to reduce energy expenditure, hence addressing various sustainability development goals.
Simeng Xie +2 more
wiley +1 more source
Systematic analysis on the energy loss in pump-turbines
Advances in Mechanical EngineeringThe pump-turbine is a key component in pumped-storage power stations, operating under complex conditions. RANS (Reynolds-Averaged Navier-Stokes) is commonly used for numerical simulations, but the differences among various RANS models under different ...
Miao Guo +5 more
doaj +1 more source
Reliability studies of integrated modular engine system designs [PDF]
A study was performed to evaluate the reliability of Integrated Modular Engine (IME) concepts. Comparisons were made between networked IME systems and non-networked discrete systems using expander cycle configurations.
Hardy, Terry L., Rapp, Douglas C.
core +1 more source
Improved Suter Transform for Pump-Turbine Characteristics
International Journal of Fluid Machinery and Systems, 2010 Standard dimensionless parameters cannot simultaneously represent all operation modes of a pump-turbine. They either have singularities at E=0 and multiple values in the ‘unstable’ areas, or else get singular at n=0. P. Suter (1966) introduced an alternative set of variables which avoids singularity and always remains unique-valued.
openaire +2 more sources
Energy Storage System in Microgrids: Challenges and Opportunities
Energy Science &Engineering, EarlyView.Hybrid integration of multiple Energy Storage Systems (ESSs) within renewable‐powered microgrids enhances reliability, flexibility, and economic sustainability. Lithium‐ion batteries, flow batteries, hydrogen storage, and thermal systems complement each other through coordinated control via Energy Management Systems.
Mohamed G. Moh Almihat, Josiah L. Munda
wiley +1 more source
Energy Science &Engineering, EarlyView.The simulation shows that the comprehensive heat transfer effect of using nanofluids as cooling liquid is greater than 1.30 nm SiO2/water and 40 nmAl2O3/water nanofluids have the best heat transfer enhancement effect, while all nanofluids of 30 nm Al2O3/water have the best heat transfer enhancement effect.
Bing Dai +6 more
wiley +1 more source