Heat transfer coefficient传热系数: 焦耳/米2·秒· KJ/(m2·s·K) 或瓦/ 米2K[W/(m2·K)] 千卡/米2·时·℃ [kcal/(m2·h·℃)] 卡/厘米2·秒·℃ [cal/(cm2·s·℃)] 英热单位/ 英尺2·时·℉[Btu/(ft2·h·℉)] 1 0.8598 2.388×10 -5 0.1761 1.162
·℉ )] 1 2.78×10 -3 1.16 1.16×10 -2 0.672 360 1 418.7 4.187 242 0.8598 2.39×10 -3 1 10 -2 0.578 85.98 0.239 100 1 57.8 1.49 4.13×10 -3 1.73 1.73×10 -2 1 Heat transfer coefficient 传热系数: 焦耳/米2 ·秒· KJ/(m 2 ·s·K) 或瓦 / 米2 K[W/(m 2 ·K)] ...
The heat transfer coefficient is position-dependent and varies considerably at different surfaces of specimen; thus, the temperature distribution inside is asymmetric (Costa et al., 1999; Lioumbas and Karapantsios, 2012; Sahin et al., 1999b). For example, the thermal conductivity of top crust ...
α (W m−2 K−1)– heat transfer coefficient; L (m) – characteristic length; λ (W m−1 K−1)– thermal conductivity; f (Hz) – frequency; c (J kg−1 K−1)– specific heat capacity; ϱ (kg m−3)– density; V (m3), S (m2)– body volume and surface; TS,...
The overall heat transfer coefficient for heat exchanger in polypropylene with thermal conductivity 0.1 W/mK is UPP = 1 / (1 / (50 W/m2K) + (0.1 mm) (10-3 m/mm) / (0.1 W/mK) + 1 / (50 W/m2K)) = 24.4 W /m2K The heat transfer is q = (24.4 W /m2K) (2 m2) ...
Flow and temperature field ina shell-and-tube heat exchangerillustrating heat transfer between two fluids separated by the thin metallic wall. Heat sinks are usually made of metal with high thermal conductivity (e.g. copper or aluminum). They dissipate heat by increasing the exchange area between...
3a, b). Taking into consideration the physical dimensions of the chamber, the thermal conductivity of air, the heat transfer coefficient of the materials used and the potential impact of convection (see methods for details), we produced a realistic, high-resolution, three-dimensional simulation of...
Maximum heat transfer coefficient (W/m2 K) H : Cavity depth (mm) k : Thermal conductivity (W/m K) \({k}_{\mathrm{f}}\) : Thermal conductivity of fluid (W/m K) K : Jet formation constant \({L}_{0}\) : Stroke length (mm) L : Dimensionless stroke length (L0/d)...
Boiling heat transferis an effective mechanism that can remove a large amount ofthermal energyfrom a surface owing to the highheat transfer coefficientof water (O[h]∼103–105W/m2K), thus maintaining relatively lower surface temperature. The boilingheat transfer phenomenonhas been applied to seve...
The overall heat transfer coefficient represents the heat transfer intensity through series thermal resistances connecting the hot flow to the cold flow. The total thermal resistance of the circuit is related to the convective heat transfer coefficients, the conductivity of the interface material and its...