Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
REAL-TIME INTERNAL HEAT FLUX ESTIMATION ON PULSATING HEAT PIPES USING KALMAN FITLER
Submission Author:
Bruno Henrique Marques Margotto , RJ , Brazil
Co-Authors:
Bruno Henrique Marques Margotto, Carlos Eduardo Polatschek Kopperschmidt, Marcelo Colaco, Wellington Betencurte da Silva, JULIO CESAR SAMPAIO DUTRA, Luca Pagliarini
Presenter: Carlos Eduardo Polatschek Kopperschmidt
doi://10.26678/ABCM.ENCIT2022.CIT22-0279
Abstract
The advances in electronics and aerospace technology allowed the development of advanced equipment with massive computational power. These devices, however, require a high amount of heat to be removed, in order to maintain their temperature within a desired range and guarantee their correct working condition. One of the possible solutions to achieve this is to use Pulsating Heat Pipes (PHP), also known as Oscillating Heat Pipes. These are two-phase passive thermal devices with the purpose of heat removal from a hot source to a cold region, providing a high equivalent thermal conductivity with low manufacturing costs. A detailed knowledge about the local heat transfer between the internal walls and the working fluid inside the PHP channels are crucial for a better understanding of its operation conditions, such as the thermal behavior and the two-phase flow pattern. Therefore, in this work, we aim to estimate this variable, by solving an inverse heat conduction problem. The PHP channel is modelled as an 1D transient heat conduction problem and the Kalman Filter is used to solve the inverse problem, in order to obtain an online estimation. Temperature measurements on the external wall are used, which can be obtained by an infrared camera. Results for different measurement noise levels are tested, showing a promising technique for online estimation of internal heat fluxes and gas-liquid pattern identification in Pulsating Heat Pipes.
Keywords
Pulsating Heat Pipes, inverse heat transfer problem, Kalman Filter, Two-phase Flow
