PL
P.F. Lee
info
Please Note
<p>This page displays the records of the person named above and is not linked to a unique person identifier. This record may need to be merged to a profile.</p>
2 records found
1
An electro-thermal filter (ETF) consists of a heater and a temperature sensor placed in the silicon substrate of a chip. It uses a heat wave to generate a phase shift that depends on a material property known as the thermal diffusivity. Temperature sensors and frequency references based on ETFs boast an impressive untrimmed inaccuracy, but their optimisation has been limited by a lack of accurate models. In this work, COMSOL Multiphysics was used to build and validate a finite element method (FEM) model of an ETF, and key sources of error were identified. The simulation results agreed well with experimental measurements.
...
An electro-thermal filter (ETF) consists of a heater and a temperature sensor placed in the silicon substrate of a chip. It uses a heat wave to generate a phase shift that depends on a material property known as the thermal diffusivity. Temperature sensors and frequency references based on ETFs boast an impressive untrimmed inaccuracy, but their optimisation has been limited by a lack of accurate models. In this work, COMSOL Multiphysics was used to build and validate a finite element method (FEM) model of an ETF, and key sources of error were identified. The simulation results agreed well with experimental measurements.
Bachelor thesis
(2024)
-
P.F. Lee, T. Ritmeester, H.W. van Zeijl, J. van Turnhout, L.F.A. Wymenga, A.J. van Genderen
Disinfection of seeds is a method used by the seed industry to remove pathogens. However, conventional methods have their shortcomings in terms of energy efficiency and yield. This thesis focuses on the design of a fluidized bed setup with sensors for the purpose of DBD plasma disinfection.
Two configurations were investigated, namely a spouted bed and a bubbling fluidized bed, where the bubbling fluidized bed produced the best results. Additionally, the fluidized bed was equipped with motor speed control, and with sensors for the measurement of ozone concentration, temperature, humidity, air speed, and ion density. These sensors were integrated in an easy readout system using displays, making the system ready for testing of disinfection performance.
...
Two configurations were investigated, namely a spouted bed and a bubbling fluidized bed, where the bubbling fluidized bed produced the best results. Additionally, the fluidized bed was equipped with motor speed control, and with sensors for the measurement of ozone concentration, temperature, humidity, air speed, and ion density. These sensors were integrated in an easy readout system using displays, making the system ready for testing of disinfection performance.
...
Disinfection of seeds is a method used by the seed industry to remove pathogens. However, conventional methods have their shortcomings in terms of energy efficiency and yield. This thesis focuses on the design of a fluidized bed setup with sensors for the purpose of DBD plasma disinfection.
Two configurations were investigated, namely a spouted bed and a bubbling fluidized bed, where the bubbling fluidized bed produced the best results. Additionally, the fluidized bed was equipped with motor speed control, and with sensors for the measurement of ozone concentration, temperature, humidity, air speed, and ion density. These sensors were integrated in an easy readout system using displays, making the system ready for testing of disinfection performance.
Two configurations were investigated, namely a spouted bed and a bubbling fluidized bed, where the bubbling fluidized bed produced the best results. Additionally, the fluidized bed was equipped with motor speed control, and with sensors for the measurement of ozone concentration, temperature, humidity, air speed, and ion density. These sensors were integrated in an easy readout system using displays, making the system ready for testing of disinfection performance.