Heating Source:not volumetric heating Qe T T2 k1 k2 0x习 T-MMMT2 L1 Rtc A RtczA L2 k1A Qe k2A L2 Ultra thin electric heater
Heating Source: not volumetric heating Ultra thin electric heater
Convection Thermal Resistance qconv T 9- Ts-Too 1 Rconv= Aconv hA(T;-T)=halk/W] Too,h qconv Ts-MMTo
Convection Thermal Resistance
Radiation Resistance Tsur Arad,net Ts-Tsur 1 Rrad Ts-Tsu= Ts-Tsur Qrad eo(T-T )A-h(T-T )A=hAlk/W] hr =E(T+Tsur)(Ts +Tsur)
Radiation Resistance
Overall Tsur Aconv hA 习 T WT∞ Acond Acond L- M Tsur Qrad 1 hrA
Overall
Thermal resistance in radial systems Cylindrical 2 2πLK Spherical (侣)
Thermal resistance in radial systems Cylindrical Spherical