Door closer-based energy harvester for smart buildings

I&T Solution Door closer-based energy harvester for smart buildings
(REF: S-1205)
Trial Project
Solution Feature
  • Frequency-up conversion mechanism: The customized gearbox is developed to harvest the ultra-low-frequency kinetic energy of the swing door motions.
  • Force-amplification effect: The energy harvester with optimized mechanical parameters will be installed at the designated position of the door closer, forming a labor-saving lever with the door handle.
  • High power output. Test results show that the peak power reach up to 7.2 Watts from a normal single door opening moment (angular velocity: 45°/s).
  • High efficient Power-management circuit. The customized high-efficiency chip modules store intermittent high-power and serve as a power source for smart electronics.
  • Low cost. The cost of fabrication is low (<200 hkd="" set="" and="" it="" is="" suitable="" for="" mass="" production="" and="" promotion="" li="">
Trial Application and Expected Outcome
  • Fabricate a prototype. The prototype is equipped with a power management circuit (PMC) that stores intermittent electricity in PMC module.
  • Site installation and measurement. The energy harvester is coupled in the door closer and tested in field.
  • Optimization for geometric dimensions and circuit parameters.
  • Demo of powering a kind of IoTs (i.e., door entrance, sensors) at a normal angular velocity.
  • Final report
Additional Solution Information Proposal of the Hinged-door EH-updated.docx
Info on I&T Solution Provider
Solution Provider:City University of Hong Kong
Address:B1482, AC 1 building, City University of Hong Kong. Tat Chee Avenue. Kowloon Tong.
Contact Person:Zhengbao YANG
Position:Associate Professor
Tel:3442 2308
Email: zb.yang@cityu.edu.hk
Webpage: https://www.cityu.edu.hk/mne/stvl/index.html

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