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Zhaoyi Zhuang, Jin Zhao, Fengfeng Mi, Teng Zhang, Yuguo Hao and Shangyue Li
Heat pump technology can extract low-level heat energy from urban sewage to heat or cool buildings, which can alleviate the two major problems of energy shortage and environmental pollution to a certain extent. This paper introduces the principle of wast...
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Yong-Dae Jeong, Min Gyung Yu and Yujin Nam
Renewable energy systems have received a lot of attention as sustainable technology in building sector. However, the efficiency of the renewable energy systems depends on the surrounding conditions, and it could gradually decrease by excessive and long-t...
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Chunxiao Wu, Yu Lu, Shewen Liu, Zhiyuan Li, Zhuhao Gu, Wu Shao and Chuang Li
A pump-jet propulsion system is composed of rotor, stator, and duct. The stator has the front stator type and the rear stator type; the conduit also has the acceleration conduit and the deceleration conduit two forms. It is difficult to design and evalua...
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Haigang Ding, Jiyun Zhao, Gang Cheng, Steve Wright and Yufeng Yao
A new leaking valve-pump parallel control (LVPC) oil hydraulic system is proposed to improve the performance of dynamic response of present variable speed pump control (VSPC) system, which is an oil hydraulic control system with saving energy. In the LVP...
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Jae-Ki Byun, Dong-Hwa Jeong, Young-Don Choi and Jong-Keun Shin
In the present study, a fuel cell driven ground source heat pump (GSHP) system is applied in a community building and heat pump system performance is analyzed by computational methods. Conduction heat transfer between the brine pipe and ground is analyze...
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Seungtaek Lim, Jiwon Yoon, Hosaeng Lee and Hyeonju Kim
South Korea is currently in the preparatory stage of commercializing an ocean thermal energy conversion (OTEC) system, as the demonstration of a 1 MW scale OTEC system has been accomplished. However, the commercialization of OTEC requires the establishme...
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Xuyang Liu, Jiayang Pang, Lei Li, Weiqiang Zhao, Yupeng Wang, Dandan Yan, Lingjiu Zhou and Zhengwei Wang
Because a pump-turbine mainly undertakes the role of energy conversion and pumped storage in the field of hydropower engineering, the complex transition process and frequent conversion between different working conditions lead to the increase in the stre...
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Ling-Tim Wong, Chun-San Chan, Kwok-Wai Mui and Dadi Zhang
Previous studies have demonstrated the energy- and water-saving potentials of showering facilities in residential buildings. However, the prospect of public showering places where multiple showerheads usually worked together according to their opening ho...
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Elias Tasca, Mohsen Besharat, Helena M. Ramos, Edevar Luvizotto, Jr. and Bryan Karney
Air valves are protective devices often used in pressurised water pipelines, ideally admitting air to limit sub-atmospheric pressures and controlling the release of entrapped air. This work summarises a comprehensive sensitivity analysis of the transient...
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Mohamed Fawzy El-Khatib, Mohamed-Nabil Sabry, Mohamed I. Abu El-Sebah and Shady A. Maged
Conventional control methods, which follow the maximum power point (MPP), suffer from being slow or inaccurate during sudden changes in irradiance and temperature. These problems can be solved using artificial intelligence algorithms. The current study p...
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Tong Guo, Biao Wu, Tianliang Lin, Honghui Chen and Qihuai Chen
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Mohamed Ghorab, Libing Yang, Evgueniy Entchev, Euy-Joon Lee, Eun-Chul Kang, Yu-Jin Kim, Sangmu Bae, Yujin Nam and Kwonye Kim
Hybrid renewable energy systems are subject to extensive research around the world and different designs have found their way to the market and have been commercialized. These systems usually employ multiple components, both renewable and conventional, c...
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Houlin Liu, Jiawei Lin, Runan Hua and Liang Dong
In order to eliminate the noise in the pumping system and prolong the service life of the equipment, an optimization design method for a muffler structure is proposed. The inside of the muffler is designed with a water guide cone which plays the role of ...
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Remo De Donno, Alessia Fracassi, Antonio Ghidoni, Alessandro Morelli and Gianmaria Noventa
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Yoshitaka Sakata, Takao Katsura and Katsunori Nagano
This study determined the required lengths of borehole heat exchangers (BHEs) in ground-source heat pump systems for heating/cooling a building (with 300 m2 of floor area) across Japan?s four main islands through a simulation approach. Hourly thermal loa...
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Tadashi Togashi, Shigeki Owada, Yuya Kubota, Keiichi Sueda, Tetsuo Katayama, Hiromitsu Tomizawa, Toshinori Yabuuchi, Kensuke Tono and Makina Yabashi
We constructed a synchronized femtosecond optical laser system with spatiotemporal stabilization for pump-probe experiments at SPring-8 Angstrom Compact Free Electron Laser (SACLA). Stabilization of output power and pointing has been achieved with a smal...
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Qiaorui Si, Rong Lu, Chunhao Shen, Shuijing Xia, Guochen Sheng and Jianping Yuan
Improving the efficiency of fluid machinery is an eternal topic, and the development of computational fluid dynamics (CFD) technology provides an opportunity to achieve optimal design in limited time. A multi-objective design process based on CFD and an ...
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Christos Manopoulos, Giannis Savva, Achilleas Tsoukalis, Georgios Vasileiou, Nikolaos Rogkas, Vasilios Spitas and Sokrates Tsangaris
In this study, an infusion roller pump comprising two separate innovative resilient tube designs is presented. The first incorporates the flexible tubing cross-section area in its relaxed state as a lenticular one for power reduction reasons. The second ...
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George K. Adam, Nikos Petrellis, Panagiotis A. Kontaxis and Tilemachos Stylianos
The progress of embedded control systems in the last several years has made possible the realization of highly-effective controllers in many domains. It is essential for such systems to provide effective performance at an affordable cost. Furthermore, re...
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Miklós Kassai
Pág. 207 - 213
In this research the technical designing of energy efficient heating system with vertical-borehole heat pumps for institutional buildings was performed. The local government would like to change the old gas boiler-based heat producing system to up-to-dat...
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