Thermal Energy Engineering Laboratory

H. Ito

Hiroyuki Ito
(Associate Professor)

Office: 8-515 Ext.: 3436 Laboratory: 8-45-1 Ext.: 3427


03/1995, Ph.D., Hokkaido University

03/1992, M.S., Hokkaido University

Research Field

Combustion Engineering, Thermal Engineering.

Research Overview

Studying combustion characteristics of highly densified biomass briquettes and the influence of non-equilibrium plasma on biomass cracking. Developing optical measurements of soot in diffusion flames.


Combustion of Highly Densified Biomass Briquettes

Biomass fuels have attracted much attention because they can reduce fossil fuel consumption, helping to prevent global warming. There are few studies of combustion of biomass briquettes and pellets and instruments for its measurement, whereas there are many studies assessing the cost and efficiency of pelletizing and briquetting. In particular,the combustion of highly densified biomass briquettes, which have great advantages in storage and transport, should be investigated. In this laboratory, we are developing a new combustion method that can control the combustion rate of biomass briquettes based on producing biomass briquettes of different shapes. The combustion characteristics of the method have been investigated.

Optical Measurement of Soot in Diffusion Flames

Lasers are generally used as a light source to evaluate the soot volume fraction in the diffusion flame. LEDs, which are more convenient than lasers, have been used even though it is unknown whether LEDs give the same results as lasers. We are investigating the validity and measurement characteristics of LED light sources.

  • 1) “Study on one-dimensional steady combustion of highly densified biomass briquette (bio-coke) in air flow,” Proceedings of the Combustion Institute, vol. 35(2), pp. 2415–2422 (2015).
  • 2) “Interaction between propagation speed and flame structure in downward cellular propagating flame in a combustion tube with CO2 laser irradiation,” Combustion Science and Technology, vol. 186, pp. 1434–1446 (2014).
  • 3) “Investigation of applying DC electric field effect on carbon nanotube synthesis,” Asia-Pacific Journal of Chemical Engineering, vol. 8(2), pp. 246–253 (2013).
  • 4) “Ignition limit of short-term overloaded electric wire in microgravity,” Proceedings of the Combustion Institute, vol. 34(2), pp. 2665–2673 (2013).
  • 5) “Study on unsteady molten insulation volume change during flame spreading over wire insulation in microgravity,” Proceedings of the Combustion Institute, vol. 34(2), pp. 2657–2664 (2013).
  • 6) “Combustion study of solid biomass – combustion characteristics of highly densified biomass briquette,” Journal of Smart Processing, vol. 1(2), pp. 36–43 (2012) (in Japanese).
Affiliated Academic Organizations

The Japan Society of Mechanical Engineers, Combustion Society of Japan, The Japan Institute of Energy (Biomass Division), Japan Society for Design Engineering.

Current members
◯ Assistant Professors: 1
◯ Undergraduates: 12