Naslov
Determination of Thermal Conductivity in Liquids by Monitoring Transient Phenomenon

Autori
Božičević, Juraj ; Caharija, Alojz ; Bolf, Nenad ; Vedrina, Denis Stjepan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of XVII IMEKO WORLD CONGRESS / Ilić, Damir ; Boršić, Mladen ; Butorac, Josip - Zagreb, 2003, 1699-1701

Skup
XVII IMEKO World Congress, Metrology in the 3rd Millennium

Mjesto i datum
Dubrovnik, Hrvatska, 22.06.2003. - 27.06.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Liquid Thermal Conductivity; Hot-wire Method; Parameter Estimation

Sažetak
Method of the thermal conductivity determination which is based on heat transfer process analysis during transient phenomena caused by an energy pulse is described by application of parameter value estimation of the process model. Essentially, influence of energy pulse on the liquid thermal state in the measuring cell is negligible. During the transient phenomena caused by electrical current pulse within the wire that is located in axe of the measurement cell, one observes a short period change in the heat accumulation within the sample, which is dependent primarily on the thermal properties of the sample. By measuring the transient phenomena it is possible to determine the thermal conductivity of liquids. The task of determination of the thermal conductivity can be reduced to the task of process model parameter estimation. Unknown value of parameter l (lambda) for water, benzene and toluene is being estimated by application MIT algorithm based on Model Reference Adaptive Systems Method.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA