Research Information System
Thesis Type: Postgraduate
Institution Of The Thesis: Gazi Üniversitesi, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2019
Thesis Language: Turkish
Student: ADİL FATİH IRMAK
Supervisor: TAYFUN MENLİK
Open Archive Collection: AVESIS Open Access Collection
Abstract:Nanofluids are fluids containing nanometer-sized particles, called nanoparticles. These fluids are obtained from the suspension of nanoparticles in base fluids. This study experimentally indicated the effect of using a nanofluid obtained from fly ash comprised of various types of metal oxides in varying ratios on improving the performance of thermosyphon type heat pipe. In the study, nanofluids are produced by suspending 0,2% Triton X-100 type surfactant and nano-sized fly ash at a concentration of 2% (wt) and 4% (wt) in ultrasonic bath method. A straight copper tube with a length of 1m, outer diameter of 15 mm, inner diameter of 13 mm was used as the thermosyphon type heat pipe. Three different heating power levels (200, 300, and 400 W) were used in the experiments with three different flow rates of cooling water (5, 7,5, and 10 g/s) used in the condenser for cooling the system. When 4% (wt) fly ash containing nanofluid was used to replace deionized water at a heat load of 200W and with a cooling water flow rate of 5 g/s, an increase of 26,39% was achieved in the efficiency of the thermosyphon type heat pipe.