Results 71 to 80 of about 1,253,627 (291)

Low‐Dimensional Materials and Van Der Waals Heterostructures for Energy Application: A Comprehensive Review

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Low‐dimensional materials (0D, 1D, and 2D) exhibit unique electronic and physicochemical properties, enabling advanced nanoelectronic and optoelectronic devices. Mixed‐dimensional heterostructures combine these materials to enhance functionality.
Qaisar Alam, Sajjad Ali, Pir Muhammad Ismail, ABM Sharif Hossain   +3 more
wiley   +1 more source

Mechanism analysis of the abnormal head-cover vibration of an ultra-high-head pump-turbine operating in pump mode by CFD and FEM

Engineering Applications of Computational Fluid Mechanics
Hydraulic excitation causes abnormal head-cover vibration in some pump-turbines, particularly as design heads continue to rise. Pump-turbines with heads exceeding 600 m have reported such vibrations in pump mode, and it is urgent to reveal the reasons. A
Song Xue, Haolin Tian, Yongguang Cheng, Xiaoxia Hou, Ziwu Guan, Weijia Yang, Zhiyuan Wang, Zhaoning Wang, Qiyuan He   +8 more
doaj   +1 more source

Space shuttle main engine: Interactive design challenges [PDF]

, 1985
The operating requirements established by NASA for the SSME were considerably more demanding than those for earlier rocket engines used in the military launch vehicles or Apollo program.
Mccarty, J. P., Wood, B. K.
core   +1 more source

Flexible Direct‐Conversion X‐Ray Detectors: From Emerging Materials to Conformal Imaging

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This comprehensive review analyzed the performance, challenges, and future directions of four emerging material systems for next‐generation flexible direct‐conversion X‐ray detectors: organic semiconductors, perovskites, metal–organic frameworks, and inorganic metal compounds.
Haipeng Di, Guoliang Ma, Jiaxin Mu, Kailian Dong, Haibin Li, Manjing Wang, Xin Song, Haojin Li, Jianwei Xu, Yiying Zhao, Jingjing Zhao, Guojia Fang   +11 more
wiley   +1 more source

Numerical Predictions of Pressure Fluctuations in a Model Pump Turbine with Small Guide Vane Opening based on Partial Averaged Navier Stokes Approach

Journal of Applied Fluid Mechanics, 2016
Comparing with conventional hydraulic turbine (e.g. Francis turbine), pump turbine shows significant unstable characteristics because its design is a compromise between a pump and a turbine.
J. T. Liu, Yulin Wu, Yong Li
doaj  

Intelligent Control Framework of District Heating Systems Considering Waste Heat Utilization in Data Centers

Energy Science &Engineering, EarlyView.
A deep reinforcement learning–based control architecture is proposed to coordinate heat pumps, thermal storage, renewable energy, and demand response in data center waste heat recovery systems. The agent learns optimal control actions from system states and reward feedback to achieve electrical–thermal co‐optimization under realistic operational ...
Rendong Shen, Ruifan Zheng, Shengyuan Zhong, Lei Gu, Dongfang Yang, Jun Zhao   +5 more
wiley   +1 more source

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

AI‐Driven Optimization of a Hybrid PV–Wind–BESS Microgrid for a Rural Educational Institution in Developing Countries

Energy Science &Engineering, EarlyView.
An AI‐driven CNN–LSTM forecasting framework is integrated with HOMER Pro to optimally design a grid‐connected PV–wind–BESS microgrid for a rural school in Bangladesh, achieving 91.7% renewable penetration, low energy cost (0.0397 USD/kWh), and an 81.5% reduction in CO2 emissions. ABSTRACT Hybrid renewable microgrid planning in HOMER Pro often relies on
Robiul Khan, Md. Wajed Ali, Md. Feroz Ali, Md. Shafiul Alam, Mohammad Ali, Imil Hamda Imran   +5 more
wiley   +1 more source

Environmental Thermoeconomic Performance Analysis of Gas Steam Combined Cycle With Different Inlet Air Cooling Technologies

Energy Science &Engineering, EarlyView.
This study establishes an environmental thermoeconomic cost model to investigate the impact of two IAC technologies on the performance of a GSCC from three aspects of energy, economy, and environment. Under arid climate conditions, the SEC technology demonstrates superior performance in terms of cost‐effectiveness and environmental impact.
Zhen Wang, Li Zhang, Yu Ni, Liqiang Duan
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