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Pollack Periodica
Authors: Ali Kareem Abdulrazzaq, György Bognár, and Balázs Plesz

combined electro-thermal modeling of PV systems. The rest of this section will summarize some of these research papers. In [ 7 ], the authors proposed an electro-thermal model based on the Single Diode Model (SDM) and thermal feedback circuit to model the

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This study proposes a re-evaluation of the thermal models for lithosphere in the main tectonic units of the extra-Carpathian area (Central Moesian Platform, Black Sea Block and East-European Platform) and a minimization of the uncertainties in the spatial distribution of the parameters required in thermal modelling, by assimilation of available information supplied by tomographic seismic data, using the seismic wave velocity — temperature conversion. The thermal structures of the three tectonic compartments are estimated through the extrapolation of the surface heat flow determinations and by thermal modelling simulating the main geodynamic processes affecting the lithospheric structures (sedimentation in the Focşani Depression, magma eruption in the Neogene volcanic belt and convergence process in the Eastern Carpathians). Forcing the 1D and/or 2D thermal models (heat flow derived geotherms) to fit the seismic constraints (seismic derived geotherms) the more plausible values for the thermal parameters are assessed. The rheological structures in the investigated zones are then obtained by valuating the developed thermal models and are interpreted in correlation with the characteristics of the seismic wave propagation process — quality factor of the medium Q , provided by recent seismic studies.

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Production demands at TRIUMF have pushed present target designs to the limit of their beam current capacity. A thermal analysis of the present high-current solid production targets has been carried out in order to increase radioisotope production rates through maximizing current handling capability. This paper describes the optimization of a 5° incident angle solid target for radioisotope production in service on the TRIUMF TR-30 cyclotron. Target materials compared include silver and Glidcop®,1 a dispersion-strengthened copper composite. A summary of comparative results is presented.

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This paper describes the thermal modelling results for a thin film resistor array which can have applications in infrared scene projection. In this design, the array consists of two parallel rows of resistor elements. A central aluminium busbar which forms a common electrical connection for all resistor elements, also provides thermal isolation between the two rows through thermal connection to the array substrate. It is shown that the thickness of the aluminium busbar of the order of 2 μm is sufficient to provide good thermal isolation, thus allowing an increase in the pixel fill factor.

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It is well known that the imposing of boundary conditions (BC) at the outer sample boundaries leads to an infinite speed of propagation of heat. Although any finite temperature difference is propagated with a finite velocity, the temperature history at a given point does not in general reflect the correct layer sequence. In order to overcome this non-physical description, we treat two simple examples as Stefan problems (moving BC at the propagation front).

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rise and steep temperature gradient within a battery could also result in the battery failure [ 6 ]. Thus, thermal model is regarded as an important target to evaluate Ni/MH battery, which can be used in different situations and different

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Abstract  

This work discusses thermal behavior of Ni/MH battery with experimental methods. The present work not only provides a new way to get more exactly parameters and thermal model, but also concentrates on thermal behavior in discharging period. With heat generation rate gained by experiments with microcalorimeter, heat transport equations are set up and solved. The solutions are compared with experiment results and used to understand the reactions inside the battery. Experiments with microcalorimeter provide more reliable data to create precise thermal model.

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Abstract  

The spiral plate heat exchanger (SHE) is widely used in plenty of industrial services in full counter current flow liquid-liquid heat exchange. We have produced a thermal modelling of the heat exchanges in both steady-state and time dependent cases with 2D spiral geometry, allowing computation with different materials, forced convective heat transfer models in turbulent flow and geometrical parameters options. We will display here some results in steady-state conditions in order to improve the exchanger performances.

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The occurrence of Quaternary thrusting in Himalayas and its geodynamics constraints in Southern Tibet is modelled using stress simulation analysis. 2D non-linear elastic and homogeneous wedge models, representing cross-sections of the Himalayas and Tibet are used. Simulated stresses for a set of boundary conditions, representing building up of Himalayas and Southern Tibet, reveals the region of thrust failure gradually recedes away from the wedge towards the base (lower boundary) with a decrease in the strength of the base. Thus, the result favours the preposition that a strong and a weak basal (Main Himalayan Thrust; MHT) respectively, below Himalayas and Southern Tibet is responsible for presence and restricting the extension of Quaternary thrusting in these regions. A decrease in strength of MHT from the Himalayas to Tibet is also supported by observational evidence and thermal modelling, imply partial melting along MHT.

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