د. عبد الوهاب حسن خضر, صهيب خليل أبراهيم , علي عادل بتاوي
المؤلفون بالإنجليزي
Ali Adel Battawi , Sohaib Khlil , Dr. Abdulwahab Hassan Khuder
الملخص الانجليزي
Recently it was important to improve heat transfer performance of heat exchanger because they were considered general equipment. Heat exchangers have many applications such as power production units, home appliances, manufacturing companies and transportations. The current paper presents results obtained from experimental investigations the enhancement the heat transfer by a horizontal tube through means changing twisted tape that insert in pipe tube with water as a working fluid. The thermo hydraulic performance depends on several factors such as configurations of geometry insert. An experimental and numerical investigation via Ansys11.0/ Flotran is carried out with twisted tapes under different shape configuration of tapes. Sixteen cases are investigated in this paper, firstly the tube without holes in the tape is tested, with different hole diameters (4, 7.5 and 10.5) mm each one has one, two, three and four twists. It can be concluded that the number of twisted tapes was directly proportional to the velocity and inversely with temperature. The hole diameters in the twisted tape have an effect on the distribution of temperature and velocity. Good agreement is evident between experimental and numerical results with discrepancy 4%. It was found that the tape with two twists superior in heat transfer about (31%) as compared with another twisted tapes.
د.عبدالوهاب حسن خضر | Dr. Abdulwahab Hassan Khuder | 4580