A new design for panel radiators using cfd
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Tarih
2016
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Yıldız Teknik Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
An experimental study was conducted in accordance with EN442 in the standard test room in order to determine boundary conditions for computational study and verify numerical results. Tests were carried out in three different operating conditions. Turbulent natural convection coupled with thermal radiation in the test room and water flow inside the tested radiator were simulated by means of CFD together in order to compare with the experimental data obtained for this cavity at a Grashof number equal to 1.09x109. In carrying out numerical investigations, a three-dimensional, low-turbulence, two-parameter k–? model known as the low-Reynolds-number k–? turbulence model was used. Non-uniform temperature distribution on the front surface of tested panel radiator was observed. The difference between experimental and computational heat transfer rate are 1.70% in case of the excess temperatures of 50 °C. Quite good results are obtained for the excess temperature of 50 °C. The study shows that computational methods can be applicable in the design of new heater types. The aim of the study is the distribution of the fluid flow at each vertical duct inside panel homogeneously. High temperature gradients occur inside panel where fluid flows because of distinct values of mass flow rates at vertical ducts. It is found that the rate of heat transfer is increased by approximately 8% and weight is decreased by 17.22% using novel panel radiator compared to the rates obtained by tested panel radiator.
Açıklama
Anahtar Kelimeler
Kaynak
Conference On Advances In Mechanical Engineering Istanbul 2016
