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Digital design of a combine harvester using virtual prototyping

YAN Chuliang, LI Jie, ZHANG Shuming, YANG Fangfei

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2, Pages 159-163 doi: 10.1007/s11465-007-0026-6

Abstract: A parametric feature-based modeling was used to model the parts of a combine harvester.The digital virtual prototyping of the harvester was completed by virtual assembly.The vibration sieve, which is a key part of the combine harvester, was simulated and optimized.

Keywords： excellent assembly impurity harvester vibration

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Wearable thermal energy harvester powered by human foot

Guodong XU, Yang YANG, Yixin ZHOU, Jing LIU

Frontiers in Energy 2013, Volume 7, Issue 1, Pages 26-38 doi: 10.1007/s11708-012-0215-9

Abstract: With explosive applications of many advanced mobile electronic devices, a pervasive energy system with long term sustainability becomes increasingly important. Among the many efforts ever tried, human power is rather unique due to its independence of weather or geographical conditions and is therefore becoming a research focus. This paper is dedicated to demonstrate the possibility and feasibility of harvesting thermal energy from human body by sandwiching a thermoelectric generator (TEG) between human shoe bottom and ground, aiming to power a portable electronic device. Through the conceptual experiments conducted on adults, a maximum 3.99 mW steady state power output at a ground temperature with 273 K is obtained, which is sufficient enough to drive a lot of micro-electronic devices. Also, parametric simulations are performed to systematically clarify the factors influencing the TEG working performance. To further reveal the mechanism of this power generation modality, analytical solutions to the coupled temperature distributions for human foot and TEG module are obtained and the correlation between TEG characteristics and the output power are studied. It was demonstrated that, the TEG working as a wearable power resource by utilizing thermal energy of human foot shows enormous potential and practical values either under normal or extreme conditions.

Keywords： human power thermal energy energy harvesting micro power wearable device