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Remote Measurement and Heat Demand Control of CHP System With Heat Storage at Sapporo City University

[+] Author Affiliations
Osamu Kurata, Norihiko Iki, Takayuki Matsunuma, Tetsuhiko Maeda, Satoshi Hirano, Katsuhiko Kadoguchi, Hiromi Takeuchi

National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan

Hiro Yoshida

Kanagawa Institute of Technology, Atsugi, Kanagawa, Japan

Paper No. IMECE2010-39906, pp. 1365-1374; 10 pages
doi:10.1115/IMECE2010-39906
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME

abstract

Combined heat and power (CHP) systems are widely used to prevent global warming and reduce energy costs. Both high efficiency of the elements and good coordination of the systems are considered as the points to solve. A microturbine CHP with a latent heat storage system was demonstrated at Sapporo City University. The heat exchanger of the CHP and an economizer were located in parallel downstream a bypass-dumper of the exhaust gas. The latent heat storage tank was located downstream the economizer. The bypass-dumper released exhaust gas when the boiler water in the heat exchanger exceeded 90°C. It is very important to use the heat supply of hot water as much as possible. At Sapporo City University, the winter term heat demand from 6pm to 7pm was somewhat smaller than that from 8am to 6pm. We tested a partial load from 6pm to 7pm to observe how it would respond to the heat demand. The heat supply from the microturbine CHP from 6pm to 7pm was shown to be controllable with heat storage. The heat supply from the microturbine CHP at the lowest power was larger than the heat demand so without the heat storage it was uncontrollable.

Copyright © 2010 by ASME

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