000 03198nam a2200253 a 4500
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003 KUKTEM
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008 100519t2009 my ao f m 000 0 eng d
020 _aTHE0006241(Local)
039 9 _a201905161216
_baida
_c201107132320
_dVLOAD
_y201005191621
_ztraining
040 _aUMP
090 _aTJ260 .K49 2009 rs Bc.
100 0 _aMohammad Khyru Aris
245 1 0 _aStudy of heat transfer coefficient for multi-jet air impinging cooling /
_cMohammad Khyru Bin Aris
246 3 _aStudy of heat transfer coefficient for multi-jet air impinging cooling
_h[electronic resource]
260 _aKuantan, Pahang :
_bUMP,
_c2009
300 _axx, 87 p. :
_bill. (some col.) ;
_c30 cm. +
_e1 computer disc
502 _aProject paper (Bachelor of Mechanical Engineering) -- Universiti Malaysia Pahang - 2009
504 _aBibliography : p. 65
520 3 _aThis thesis deals with a study of heat transfer coefficient for multi – jet air impinging cooling. Research and development for enhancement heat transfer using multi – jet air impinging cooling system shows variety possibilities. The required performance must be achieved in other to boost user satisfaction. The main objectives of this thesis are to study the effect of heat transfer coefficient by multi – jet impinging cooling system, and define the relationship between the heat transfer coefficient with the jet flow and the distance from exit nozzle to the heat source. The thesis described the methodology utilize and the result comparison among the jet used. Single, 4, and 9 jet nozzles with constant nozzle diameter, 4 mm were studied in this thesis with different jet flow and also various exit nozzle to heat source spacing. The heat source plate is constant at 100℃. Compressed Air as the coolant medium at room temperature with laminar flow at nozzle exit was studied along with 500, 950, 1960 and 2300 Reynolds numbers. From the results, it is observed that the experiment data using 9 jet array nozzle produced the highest Nusselt number in the range of 95 ℃ to 105 ℃ correspond to low temperature distribution due to many stagnation point formed. This shows the most efficient cooling system. The graph pattern shows the maximum and minimum point in view of the fact that there are many stagnation points. However, the single jet and 4 jet nozzle produced low Nusselt number. The Nusselt number graph trend is linearly decreased for single jet and linearly increased for 4 jet nozzle. The results concluded that the additional number of nozzle with higher Reynolds number and narrow spacing of exit nozzle to heat source plate being used, the more efficient performance produced. More stagnation point created during the impingement on the heat source will produced more effective cooling system. The experiment results are significant to improve the overheat component problem nowadays. The results can also significantly increase the performance of the needed component in order to improve product reliability and customer confidence.
650 0 _aHeat
_xTransmission
999 _aVIRTUA40
_c1830
_d1836
999 _aVTLSSORT0080*0200*0400*0900*1000*2450*2460*2600*3000*5020*5040*5200*6500*9992