Results 51 to 60 of about 1,570 (213)

Conversion relation of centrifugal pumps as hydraulic turbines based on the amplification coefficient

Advances in Mechanical Engineering, 2017
Most centrifugal pumps with low specific speed are designed using the method of increasing the flow rate; by this, each designer selects different flow rate amplification coefficients for the pumps.
Guangtai Shi, Xiaobing Liu, Zhengwei Wang, Yang Liu   +3 more
doaj   +1 more source

Selecting Between Hydrogen and Methanol for Fuel Cell‐Organic Rankine Cycle Hybrid Power Systems: A Comparative 4E Analysis

Energy Science &Engineering, EarlyView.
A 4E comparison of PEMFC‐ORC and DMFC‐ORC systems shows that PEMFC‐ORC achieves 21% higher energy efficiency, while DMFC‐ORC obtains 31% higher exergy efficiency and 57% lower levelized cost of electricity. However, DMFC‐ORC emits nearly twice the annual carbon dioxide equivalent of PEMFC‐ORC.
Zahra Piryaei, Maryam Karami, Iman Khazaee   +2 more
wiley   +1 more source

Techno‐Economic Analysis and Multi‐Objective Optimization of a Novel Combined Cooling and Power System Driven by Geothermal Source and Waste Heat From Data Center

Energy Science &Engineering, EarlyView.
A novel combined cooling and power generation system is proposed by integrating organic Rankine cycle (ORC) with an absorption heat transformer, which is driven by combining geothermal energy and data center's waste heat. The system using R601a yielded the best overall performance, achieving an exergy efficiency of 40.34% and an annual cost of 130.29 k$
Zerui Chen, Xin Wu, Zhukui Tan, Jian Xiao, Nan Wang   +4 more
wiley   +1 more source

Optimal Design of a Micro Reversible Pump Turbine for Balancing Generation Mode and Storage Mode

Energy Science & Engineering
The inefficiency of traditional micro horizontal pump units (double‐suction centrifugal pumps) when operating in reverse mode as water turbines has hindered their application in pumped storage systems.
Tengjiao Guo, Jiale Pan, Ran Tao, Ruofu Xiao   +3 more
doaj   +1 more source

ALLIEVI as a Tool for Simulating Hydraulic Transients in Energy Recovery Systems

Engineering Proceedings
ALLIEVI is a software developed by the Universitat Politècnica de València to model and analyze hydraulic transients in pressurized water systems. ALLIEVI allows for the modeling of valve and pump maneuvers, including pressure reducing valves (VRPs) and ...
Roberto del Teso, Elena Gómez, Elvira Estruch-Juan, Javier Soriano   +3 more
doaj   +1 more source

Integrated Solar and Wind Energy Systems for Domestic Power Generation and CO2 Emissions Reduction

Energy Science &Engineering, EarlyView.
A well‐structured and sequentially methodical procedure for evaluating the Wind and Photovoltaic Hybrid Energy System‐based technical, environmental, and economic viability. This study investigates the integration of solar photovoltaic(PV) and wind energy systems for domestic electricity generation in the Gaza Strip.
Mohamed Elnaggar, Mai Abuhelwa, Wael A. Salah, Aamir Bashir Taas, Hala J. El‐Khozondar, Yasser F. Nassar, Ahmad Aboul Khail, Alfian Ma'arif, Mohammed J. K. Bashir, Abdurrahman A. Mattar   +9 more
wiley   +1 more source

Research on the performance of pump-turbine during the transition process from pump mode to turbine mode

Frontiers in Energy Research
In current engineering, the transition process of pump turbines from pump to turbine mode mainly includes the shutdown process of pump operating and the startup process of turbine operating, and the switching of working conditions mostly depends on the ...
Zhe Man, Zhe Xu, Zhonghua Gui, Wenfu Han, Yifeng Zhao, Fei Zhang, Lianchen Xu, Yuan Zheng, Yuan Zheng, Kan Kan, Kan Kan   +10 more
doaj   +1 more source

Techno‐Economic and Quasi‐Dynamic Load Flow Analysis of a Hybrid Renewable Microgrid for Coastal Industrial Loads

Energy Science &Engineering, EarlyView.
A hybrid PV–wind grid‐connected microgrid for Mongla Port is optimized using HOMER Pro and validated via DIgSILENT quasi‐dynamic load flow. The system achieves a low cost of energy (0.0341 USD/kWh), 70.9% renewable penetration, improved voltage stability, and significant emission reduction, demonstrating a reliable and cost‐effective solution for ...
Md. Behesty Hasan Sagor, Md Abdus Samad Kamal, Md. Feroz Ali, Md. Mahedi Hasan, Fahad Saleh Al‐Ismail, Md Shafiul Alam, Mohammad Ali   +6 more
wiley   +1 more source

Genetic Algorithm‐Driven Analysis of Gravitational Water Vortex Power Plant Runner Performance: A Comparative Study Integrating Experimental and Computational Fluid Dynamics

Energy Science &Engineering, EarlyView.
This study integrates genetic algorithm optimization, CFD simulation, and experimental validation to identify the optimal runner geometry for a gravitational water vortex turbine. The combined approach enhances vortex stability and improves energy conversion efficiency, demonstrating strong agreement between predicted and measured performance ...
Zakaria. A. Mwakitwange, Adam Faraji
wiley   +1 more source

Structural design and 3D printing of flexible integrated electronic systems

FlexMat, EarlyView.
This review provides a comprehensive overview of design and integration strategies for individual components in flexible electronics, highlights the 3D‐printing fabrication techniques, and discusses recent advances in system‐level integration and their applications in real‐time monitoring and intelligent robotics.
Jiani Gong, Jiaying Wang, Changsong Shi, Chi Guo, Songze Fu, Jie Tao, Xiaolong Chen, Yunfei Chen, Zhiyang Lyu   +8 more
wiley   +1 more source