Chimney Effect on Natural Convection Cooling of a Transistor Mounted on a Cooling Fin

Mey, G. De; Wójcik, M.; Pilarski, J.; Lasota, Martin; Banaszczyk, Jȩdrzej; Vermeersch, Bjorn; Napieralski, A.; Paepe, Michel De

doi:10.1115/1.3068307

Cited by 13 publications

(3 citation statements)

References 11 publications

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“…Measured absolute temperature for the estimated junction temperature (blue curve), heatsink (red curve) and heatsink cover (yellow curve) for 150W power dissipation for cm and 35 cm heatsink It can be seen from Figure 8 that the effect of the heatsink cover is to increase the steady-state junction temperature by only 4 o C, whilst the cover (touch) temperature is it a safe level of 35 o C. It may be expected that the inclusion of a heatsink cover would have a detrimental effect on the junction temperature. However, the modest increase in junction temperature of 4 o C arises to the desirable "chimney effect" [11], which occurs as ambient air is forced upward through the vertically oriented heatsink fins by convection. With the heatsink cover included it was found that for higher values of dissipation, the estimated junction temperature became the limiting factor -maximum 150 o C from section 3.…”

Section: Pec Thermal Experimental Measurementsmentioning

confidence: 99%

Thermal aspects of a low cost power electronic converter for high capacity, smart residential distribution networks

Amiri

Cross²,

Ignadossian³

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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A key challenge facing the UK Distribution Network Operators (DNOs) today is the increasing demand for power being placed on residential networks. Also, the increase in distributed generation (DG) is now resulting in unacceptable local voltage rises and power quality issues. A cost effective solution to these problems can be achieved on the existing infrastructure by increasing the local network phase voltage to 400 V and stepping back down to 230 V at each house, using a DNO-owned, voltage regulated power electronic converter (PEC). The thermal and protection issues associated with the design of such a PEC, which is to be installed in the meterbox of each property, are discussed in this paper.

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Section: Pec Thermal Experimental Measurementsmentioning

confidence: 99%

Thermal aspects of a low cost power electronic converter for high capacity, smart residential distribution networks

Amiri

Cross²,

Ignadossian³

et al. 2016

8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016)

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“…A vertical space is needed for the vehicles to be transported upwards to the parking tower. This vertical space designed for transportation resembles a chimney, which could facilitate a chimney effect [1][2][3] in case of a fire in the parking tower. The chimney effect can also lead to a rapid spreading of the fire, thus causing heavy losses if rescue is delayed.…”

Section: Introductionmentioning

confidence: 99%

A research of chimney effects of fire field in a parking tower fire

Lin¹,

Ma²,

Hsu³

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Taiwan has significantly varying terrains, and majority of its population centralize in the plain area, where most cities are located. Most buildings here are for both commercial and residential use, and they are expanding upward in order to make use of the space better. In such high-rise buildings, parking towers are designed to facilitate parking space for vehicles. This case uses a computer numerical simulation method to simulate the expansion of a fire inside a stereo parking tower in Taipei, Taiwan. It replicates the situation of how the fire starts and studies the effects of temperature, smoke, CO concentration, and the flow of heat generated in the fire field. The results of this study can not only provide a reference to relevant companies for fire prevention design and to select fire facilities for a common parking tower but also help to arise security awareness among people who enter the parking towers.

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“…This method will be used in this contribution to determine ϕ(τ ) from the experimentally measured T (t). The same technique has also been used intensively for the thermal characterization of semiconductor components and packages [9,10,11,12,13,14,15,16].…”

Section: Experimental Measurementsmentioning

confidence: 99%

Influence of lateral heat diffusion on the thermal impedance measurement of photovoltaic panels

Mey

Wyrzutowicz

Vos

et al. 2013

Solar Energy Materials and Solar Cells

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The thermal time constant distribution of a photovoltaic panel has been measured experimentally. A wide spectrum ranging between a few ms and a few hours have been detected. A simple thermal analysis can only explain time constants up to 500 s. It was found that the lateral heat diffusion inside the solar cells was responsible to the observed phenomena. The reason was the top finger shaped contact and the non uniform characteristics of the individual solar cells give rise to a non uniform power distribution and hence a lateral transient heat transfer.

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Chimney Effect on Natural Convection Cooling of a Transistor Mounted on a Cooling Fin

Cited by 13 publications

References 11 publications

Thermal aspects of a low cost power electronic converter for high capacity, smart residential distribution networks

Thermal aspects of a low cost power electronic converter for high capacity, smart residential distribution networks

A research of chimney effects of fire field in a parking tower fire

Influence of lateral heat diffusion on the thermal impedance measurement of photovoltaic panels

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