Kendi kendine soğuyan transformatörlerde radyatörlerin sıcaklık ve basınç düşümü hesabı

Abstract

w AQ p c A0, (6) CO w: Oil velocity [m/s] It can be seen that the oil velocity is inversly proportional to difference temperature A8C0 of radiator inlet and outlet oil temperature. When the oil velocity is doubled, A8C0 reduces at the same proportion and the surface temperature drop is decreased %88. When the heat dissipated of one radiator element P is doubled, the surface temperature drop is increased to 1,655 times its original. The oil velocity and viscosity in the radiators causes the pressure drop: Ap C v al *o /,Po n z ) + B' zz /2,Po n z> (7 C'= 48,5 x 10s x ht [itTekg] hr Po n z: B t_ : Radiator length [m] : Axial averege viscosity of the oil [m2/s] : Mean density of oil flowing in radiators [kg/m3] : Number of radiator groups mounted on a tank of a transformer : Number of elements which is arrenged one behind another in each radiator group 5, 63 x 106 [m~7 kg] In conclusion it should be chosen radiators by being made use of diagrams and tables which is used in practice then, be checked the truth of the radiators choice by being calculated the temperature and pressure drop. Thus, as a result of the following reasons: 1) Economical problems IX

2) Endurance of transformers it is obtained the best solution for both customers and producers.w AQ p c A0, (6) CO w: Oil velocity [m/s] It can be seen that the oil velocity is inversly proportional to difference temperature A8C0 of radiator inlet and outlet oil temperature. When the oil velocity is doubled, A8C0 reduces at the same proportion and the surface temperature drop is decreased %88. When the heat dissipated of one radiator element P is doubled, the surface temperature drop is increased to 1,655 times its original. The oil velocity and viscosity in the radiators causes the pressure drop: Ap C v al *o /,Po n z ) + B' zz /2,Po n z> (7 C'= 48,5 x 10s x ht [itTekg] hr Po n z: B t_ : Radiator length [m] : Axial averege viscosity of the oil [m2/s] : Mean density of oil flowing in radiators [kg/m3] : Number of radiator groups mounted on a tank of a transformer : Number of elements which is arrenged one behind another in each radiator group 5, 63 x 106 [m~7 kg] In conclusion it should be chosen radiators by being made use of diagrams and tables which is used in practice then, be checked the truth of the radiators choice by being calculated the temperature and pressure drop. Thus, as a result of the following reasons: 1) Economical problems IX2) Endurance of transformers it is obtained the best solution for both customers and producers.w AQ p c A0, (6) CO w: Oil velocity [m/s] It can be seen that the oil velocity is inversly proportional to difference temperature A8C0 of radiator inlet and outlet oil temperature. When the oil velocity is doubled, A8C0 reduces at the same proportion and the surface temperature drop is decreased %88. When the heat dissipated of one radiator element P is doubled, the surface temperature drop is increased to 1,655 times its original. The oil velocity and viscosity in the radiators causes the pressure drop: Ap C v al *o /,Po n z ) + B' zz /2,Po n z> (7 C'= 48,5 x 10s x ht [itTekg] hr Po n z: B t_ : Radiator length [m] : Axial averege viscosity of the oil [m2/s] : Mean density of oil flowing in radiators [kg/m3] : Number of radiator groups mounted on a tank of a transformer : Number of elements which is arrenged one behind another in each radiator group 5, 63 x 106 [m~7 kg] In conclusion it should be chosen radiators by being made use of diagrams and tables which is used in practice then, be checked the truth of the radiators choice by being calculated the temperature and pressure drop. Thus, as a result of the following reasons: 1) Economical problems IX2) Endurance of transformers it is obtained the best solution for both customers and producers.