A New Electro-Thermal Modeling of Low Voltage Power MOSFET with Junction Temperature Dependent Foster (RC) Thermal Network

Thermal loading of MOSFET (Metal-Oxide-Semiconductor- Field-Effect-Transistor) model is a very important factor for the reliability of power electronics systems. Thus, the junction temperature must be accurately estimated. This paper presents a new electro-thermal (ET) model for low voltage Power MOSFET rated at (30 V/13 A) by PSpice simulator to estimate junction temperature (Tj) and power loss. The (ET) model is composed of electrical network model and (RC) thermal network model. The parameters of the (RC) thermal network model are extracted from datasheet using genetic algorithms (GA) method for computation of the transient thermal impedance (Zth(j – c)). The propose model reflects superior performance in terms of flexibility and accuracy. The results obtained indicate a good matching between proposed model and manufacturer’s data

Closure between aerosol particles and cloud condensation nuclei at Kaashidhoo Climate Observatory

Predicting the cloud condensation nuclei (CCN) supersaturation spectrum from aerosol properties is a fairly straightforward matter, as long as those properties are simple. During the Indian Ocean Experiment we measured CCN spectra, size-resolved aerosol chemical composition, and aerosol number distributions and attempted to reconcile them using a modified form of Köhler theory. We obtained general agreement between our measured and modeled CCN spectra. However, the agreement was not as good during a time period when organic carbon comprised a quarter of the total mass of the aerosol in the submicron size range. The modeled concentrations overpredict those actually measured during that time period. This suggests that some component, presumably organic material, can inhibit the uptake of water by the electrolytic fraction of the mass

Lattice Boltzmann simulation of forced convection melting of a composite phase change material with heat dissipation through an open-ended channel

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