Research Information System
Thesis Type: Doctorate
Institution Of The Thesis: Gazi University, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2021
Thesis Language: Turkish
Student: Sinan ÜNVAR
Supervisor: TAYFUN MENLİK
Open Archive Collection: AVESIS Open Access Collection
Abstract:The solar energy, which is used for electricity generation and water heating among enewable energy sources, is of great importance in terms of its use in the world. The most effective way to benefit from solar energy is solar collectors. Solar collectors are generally divided into four main types as follows: planar surface (DYGK), vacuum tube (VTGK), heat pipe (IBGK) and parabolic (PGK) and among these, DYGKs are the most commonly used. In this study, studies were carried out to increase the performance of the heat pipe plane surface solar collector (IBGK) by using nanoparticles containing 2% Al2O3 and TiO2 nanoparticles by mass. The length of the heat pipes used in the study is 100 cm, their inner and outer diameters are 8 mm and 10 mm, respectively. The plane surface solar collector consists of 8 heat pipes. Experiments were done separately for pure water and nanofluids.Thus the results were compared in terms of efficiency and power. As a result of the experiments, when pure water is used as the work fluid, the instant efficiency was determined as the highest 48%, 58% for Al2O3-pure water nanofluid and 64% for TiO2- pure water nanofluid. The highest thermal energy obtained in the experiments was 135.66 W for pure water, 167.96 W for Al2O3- pure water nanofluid and 184.03 W for TiO2- pure water nanofluid. The improvement in yields was 20.8% for Al2O3- pure water nanofluid, 33.3% for TiO2- pure water nanofluid; The improvement in powers was 23.8% for Al2O3- pure water nanofluid and 35.6% for TiO2- pure water nanofluid