Unpublished picture, A. Mityakov
THERAD project is an Academy of Finland funded consortium project which is a part of the RADDESS program granted in Nov. 2017.
ABSTRACT
THERAD research aims at creating a new fire detection and measurement technology by combining gradient heat flux sensors (GHFS) with novel spectrally selective coatings into robust, low-weight and low-cost thermal radiation sensors. GHFS are based on the transverse Seebeck effect in anisotropic materials and generate thermopower proportional to the heat flux. First we will design the coating systems by computing the localized surface plasmon resonances on low-bandcap semiconductor particles. For spherical particles, we will use Mie theory for the absorption and scattering cross sections, followed by Monte Carlo simulations for the coating transmittance. The boundary conditions for the design calculations will be taken from narrow-band radiation solution (RADCAL) of combustion products. Next, we will investigate the suitability of sol-gel and pulsed electric current sintering (PECS) manufacturing techniques for making the micro- and nanoparticle inclusions in thin coating layers to implement infrared bandpass filters. Finally, coated sensors will be optimized and calibrated for the use in flame detection and measurement problems, and validated using experimental (ISO 5660) and computational methods.
RESEARCH PARTNERS
There are four research groups involved in this project as followings:
- The Fire Safety Engineering research group, Professor Simo Hostikka, Department of Civil Engineering, School of Engineering, Aalto University, Finland.
- Laboratory of Control Engineering and Digital Systems, Professor Andrey Mityakov, Lappeenranta University of Technology, Finland.
- Laboratory of Multiscale Statistical Physics (MSP), Professor Tapio Ala-Nissilä, School of Science, Aalto University, Finland.
- Laboratory of Advanced and Functional Materials (AFM), Professor Simo-Pekka Hannula, School of Chemical Engineering, Aalto University, Finland.
NEWS AND EVENTS
- Kick-off meeting: Feb. 15th, 2018, 12-16. Meeting room F138, Otakaari 3, Espoo.
- Monthly group meetings are held every month.
- October group meeting was held on Friday Oct. 19th in the Dep. of Chemical Eng. Beside the project discussions, attendees had a laboratory tour and got familiar with the facilities of the research group of Prof. Simo-Pekka Hannula.
PUBLICATIONS AND PRESENTATIONS
- Isojärvi T., Bordbar H., Hostikka S., “Spectrally resolved calculation of thermal radiation penetration into liquid n-heptane in pool fires”, International Journal of Heat and Mass Transfer, Vol 127, pp. 1101–1109, (2018). Link.
- Isojärvi T., Bordbar H., Hostikka S., “Radiative heat transfer in pool fires”, Nordic Fire and Safety Days 2018, June 2018, Trondheim, Norway.
- Isojärvi T., Bordbar H., Hostikka S., “Calculation of radiation transmittance through n-heptane in a pool fire”, European symposium on fire safety sciences (ESFSS2018), Sep. 2018, Nancy, France.
