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Wei Qu, Qianghui Zhang, Yumei Qin, Jinggang Miao, Zeqing He and Yanchu Yang
A fan is part of the core equipment of a super-pressure balloon altitude control system, and high-performance fans have a significant impact on the altitude control capability and flight safety of super-pressure balloons. This paper proposes a mixed-flow...
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Johannes Brötz, Christian Schänzle and Peter F. Pelz
The efficiency definition allows us to compare two machines with each other. In general, the efficiency is defined as the ratio of usable power to the required power. This raises the question: what is the usable power? Most engineers discuss efficiency o...
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Pau Chung Leng, Siew Bee Aw, Nor Eeda Haji Ali, Gabriel Hoh Teck Ling, Yoke Lai Lee and Mohd Hamdan Ahmad
This paper studies the effectiveness of a solar chimney for improving ventilation and air-exchange rates in multi-storey public housing in tropical climates for the potential mitigation of airborne disease transmission. Virtual models of a typical apartm...
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Nabil Nassif, Mostafa Tahmasebi, Iffat Ridwana and Pejman Ebrahimi
Buildings account for a large portion of the total energy use in the US; therefore, improving the operation of typical variable-air-volume (VAV) systems in buildings can provide a tremendous economic opportunity. ASHRAE Guideline 36 recommends a resettin...
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Arne Seitz, Anaïs Luisa Habermann, Fabian Peter, Florian Troeltsch, Alejandro Castillo Pardo, Biagio Della Corte, Martijn van Sluis, Zdobyslaw Goraj, Mariusz Kowalski, Xin Zhao, Tomas Grönstedt, Julian Bijewitz and Guido Wortmann
Key results from the EU H2020 project CENTRELINE are presented. The research activities undertaken to demonstrate the proof of concept (technology readiness level?TRL 3) for the so-called propulsive fuselage concept (PFC) for fuselage wake-filling propul...
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Seunghun Choi, Jongho Won, Jung-Jun Lee, Hee-Keun Lee, Seong-Min Kim, Changhyun Cho and Dongil Kwon
Invar alloy sheet was welded by resistance seam welding (RSW) with a constant electrode force and three different welding currents. Tensile properties were evaluated using instrumented indentation testing (IIT) with a spherical indenter and microstructur...
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Liyang Wang, Gaurav Misra and Xiaoli Bai
Wind speed estimation for rotary-wing vertical take-off and landing (VTOL) UAVs is challenging due to the low accuracy of airspeed sensors, which can be severely affected by the rotor?s down-wash effect. Unlike traditional aerodynamic modeling solutions,...
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Yoshitaka Sakata, Takao Katsura, Katsunori Nagano and Manabu Ishizuka
Heat advection caused by groundwater flow can potentially improve the performance of a borehole heat exchanger. However, the required flow velocity is not achieved under most natural conditions. This study focuses on artificial groundwater flow generated...
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Xiaoqing Wei, Nianping Li, Jinqing Peng, Jianlin Cheng, Jinhua Hu and Meng Wang
To minimize the total energy consumption of a cooling tower-assisted heat pump (CTAHP) system in cooling mode, a model-based control strategy with hybrid optimization algorithm for the system is presented in this paper. An existing experimental device, w...
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Francisco Eneldo López Monteagudo,Claudia Reyes Rivas,Mario Morera Hernández,Rafael Villela Varela,Aurelio Beltrán Telles,Alejandro Chacón Ruiz
Pág. 242 a la 2
En este trabajo se implementó el control de un ventilador industrial utilizado para prueba de aerogeneradores, el cual es empleado como un dispositivo interno en la elaboración de un túnel de viento, para realizar pruebas de medición de viento. El proyec...
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