Thermal performance of 3D concrete printed walls: calculated and in-situ measured U-values

Numerical Evaluation on Thermal Performance of 3D Printed Concrete Walls: The Effects of Lattice Type, Filament Width and Granular Filling Material

“…The U-values from the FE simulations were 0.455 W/m 2 .K and 0.410 W/m 2 .K for the cavity and column locations, while those from in situ measurements were 0.440 W/m 2 .K and 0.395 W/m 2 .K, respectively [26]. Despite the respective errors of 3.41% and 3.80% in For the in situ measurement of the U-value, tests were conducted for both the column and cavity locations of Structure 1.…”

“…Calculated Results by Henrique dos Santos et al The constitutive model used was also validated against the work of Tamimi et al [26]. They studied the thermal performance of 3DPC walls both experimentally and numerically.…”

“…However, the insulative properties of air cavities often decrease as the cavity size increases. Tamimi et al [26] found that heat transfer studies using still air are unreliable for cavities larger than 200 mm. Large cavities suffer from the development of convection currents, reducing their insulating efficacy.…”

“…Hence, the models are accurate and reliable and could be used for detailed parametric analysis of the energy performance of 3DPC building envelopes. The constitutive model used was also validated against the work of Tamimi et al [26]. They studied the thermal performance of 3DPC walls both experimentally and numerically.…”

“…Therefore, two models were developed, and the U-values were determined with the application of the same boundary conditions. The thermal conductivities of 3DPC filament, concrete, gypsum board, glass wool, and steel are 0.781, 0.8, 0.159, 0.031, and 60.5 W/m.K, respectively [26].…”