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 2.778×10 -5 0.2048 4.1...
·℉ )] 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)] ...
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,...
Thus, based on the data in Table 1, the heat transfer characteristics in SAGD can be investigated. Table 1. Fluid and reservoir properties. PropertyModelUnit Reservoir temperature (Tr) 15 °C Steam temperature (Tst) 205 °C Steam pressure (Pst) 1.74 MPa Reservoir thermal conductivity (K) ...
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) (...
27/44 2. Method for setting given temperature in island (1) Large coefficient method-at each iteration resetting the coefficients in the discretized equations in island: P P nb nb a a b 20 30 , , 10 ~10 P given a A b A A (2) Large source term method-at each iteration resetting ...
(Fig.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 ...
Table 3. Thermal conductivity of selected materials. These insulating materials have significantly better insulating properties than water. To determine how the value of the overall heat transfer coefficient between water layers would change, simulations of the influence of the stated physical layers on...
Heat transfer performances of ionic liquid and ionanofluids for different weight percent were analyzed through the heat transfer coefficient (Equation (7)) and Nusselt number (Equation (8)). Figure 8 presents the heat transfer coefficient along the tube for ionic liquid, and ionanofluids of 0.5 ...
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...