Results 1 to 10 of about 1,144 (118)

Aerodynamic performance modeling method of high-altitude propellers across the entire flight envelope [PDF]

Scientific Reports
High-altitude propellers experience diverse aerodynamic conditions, due to the extensive altitude variation and wide range of wind speeds encountered in the flight envelope of High Altitude Long Endurance (HALE) aircraft.
Miao Zhang, Jun Jiao, Jian Zhang, Zijian Zhang   +3 more
doaj   +2 more sources

Design and experiment of IOT cooling system in glass greenhouse based on CFD simulation

Journal of Agricultural Engineering, 2022
In the summer heat season, the performance of greenhouse cooling system is the key factor of the greenhouse crop pollination and fruit formation. Scientific design of greenhouse cooling system and intelligent control of cooling equipment can ensure the ...
Zanbin Zhu, Yubin Li, Shoufu Gong
doaj   +1 more source

Economic evaluation of energy storage integrated with wind power

Carbon Neutrality, 2023
Energy storage can further reduce carbon emission when integrated into the renewable generation. The integrated system can produce additional revenue compared with wind-only generation.
Xinjing Zhang, Lu Feng, Xiaoyu Li, Yujie Xu, Liang Wang, Haisheng Chen   +5 more
doaj   +1 more source

Challenges and perspectives for solar fuel production from water/carbon dioxide with thermochemical cycles

Carbon Neutrality, 2023
Solar energy is the most sustainable alternative to fossil fuels. The production of solar thermochemical fuels from water/carbon dioxide not only overcomes the intermittent nature of solar energy, but also allows for flexible transportation and ...
Chen Chen, Fan Jiao, Buchu Lu, Taixiu Liu, Qibin Liu, Hongguang Jin   +5 more
doaj   +1 more source

Experiment and Simulation of the Startup Processes for the Supercritical Carbon-Dioxide Closed Brayton Cycle

Applied Sciences, 2023
The startup process is the crucial transition phase of the supercritical carbon-dioxide Brayton cycle, so it is essential to focus on and investigate the transient performance for the system’s safety and stability.
Shuo Qin, Shiqiang Liang, Yuming Zhu, Zhigang Li, Xinyu Gong, Jiawei Jiang, Zhixuan Shen   +6 more
doaj   +1 more source

IX International congress “Energy efficiency. XXI century”

Инженерно-строительный журнал, 2015
The congress “Energy efficiency. XXI century. Engineering methods for reducing the energy consumption in buildings” took place in St. Petersburg on 11 November 2015.
V.M. Yakubson
doaj   +1 more source

Experimental Research on a New Mini-Channel Transcritical CO₂ Heat Pump Gas Cooler

Micromachines, 2023
This paper presents the results of an experimental study on the heat transfer and pressure drop characteristics of a novel spiral plate mini-channel gas cooler designed for use with supercritical CO2.
Jiawei Jiang, Shiqiang Liang, Xiang Xu, Buze Chen, Zhixuan Shen, Chaohong Guo, Liqi Yu, Shuo Qin   +7 more
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Environmental aspects of heat recovery systems of boiler plants [PDF]

E3S Web of Conferences, 2019
The results of studies on improving the environmental characteristics of boiler plants of municipal heat-power engineering in the application of technologies for the deep recovery of heat from exhaust-gases of gas-fired boilers are presented. The data on
Fialko Nataliia, Navrodska Raisa, Ulewicz Malgorzata, Gnedash Georgii, Alioshko Sergii, Shevcuk Svitlana   +5 more
doaj   +1 more source

Modeling of temperature fields of details during laser hardening using the method of polyargument systems

Mechanics and Advanced Technologies, 2019
The data of mathematical modeling of the thermal state of a cutting tool under conditions of laser hardening are presented. The features of the implementation of the method of polyargument systems for solving the three-dimensional heat transfer problem ...
Viktor Prokopov, Nataliia Fialko, Juliiy Sherenkovsky, Vladimir Yurchuk, Nataliia Meranova, Olha Maletskaya, Oleksandra Timoshchenko, Mark Hanzha   +7 more
doaj   +1 more source

Mission-Oriented 3D Path Planning for High-Altitude Long-Endurance Solar-Powered UAVs With Optimal Energy Management

IEEE Access, 2020
The conversion efficiency of solar energy and the capacity of energy storage batteries are the key technologies limiting the development of solar-powered aircraft. In this paper, a mission-oriented design for the 3-dimensional (3D) path planning of solar-
Xiangyu Wang, Yanping Yang, Di Wu, Zijian Zhang, Xiaoping Ma   +4 more
doaj   +1 more source