@article{article_213933, title={EXPERIMENTAL EXAMINATION ON THE USE OF HEAT PIPE AND VACUUM TUBE IN THE SOLAR ENERGY WATER HEATING SYSTEMS UNDER THE CONDITIONS OF KARABÜK}, journal={Technological Applied Sciences}, volume={5}, pages={319–326}, year={2010}, DOI={10.12739/10.12739}, url={https://izlik.org/JA74HW73ZJ}, author={Gürel, Ali Etem and Camur, Dogu and Ergün, Alper}, keywords={SOLAR ENERGY, HEAT PIPE, VACUUM TUBE, EFFICIENCY, ENERGY,}, abstract={In this study, for the purposes of comparing heat pipe and vacuum tube applications in solar energy water heating systems, a collector which has the surface area of totally 0.7 m² of surface area is divided into equal parts and one end is placed with vacuum tube on and the other and is placed with heat pipe on which is manufactured by us and both of these systems were installed on the stores with the volume of 10 liters. For five days, the temperature of store water of the systems, external ambient temperature and sun radiation values were measured and recorded. According to the calculations made in accordance with the data, while vacuum tube system provided 40% efficiency under Karabük conditions, heat pipe increased up to 31% efficiency. On the other hand, the amount of energy which can be converted to usable energy was determined to be 68 W for heat pipe system and 85 W for vacuum tube system.}, number={3}