Numerical investigation of the effect of insulation on heat transfer of thermal bridges with different types

Abstract

In the present study, the effects of different types thermal bridges formed by beams for floor-wall junctions in reinforced concrete structures, with and without balconies, and the optimum configuration of the insulation layers to avoid heat loss were investigated as numerically. Both insulation between the walls and internal insulation was selected for floor-wall junctions and internal insulation was used for floor-wall junctions with balcony. Fluent package program was used to solve the temperature domain numerically. Results showed that high heat transfer rates were obtained in the region of thermal bridges for all building models. It was also obviously obtained that heat transfer rate decreased with making insulation on the beam surfaces.

Analysis on thermal and hydraulic performance of a T-shaped vapor chamber designed for motorcycle led lights

“…Results indicate that both the heat loads and cooling magnitude have strong influences on the thermal performance of the TSVC, and the thermal resistance in the extended section occupies most proportion of the overall thermal resistance of the TSVC. When the heat load is 15.84 W, the proportion of 18 Th Tch R − in the overall thermal resistance of the TSVC is in the range of 75.8%~92.4% for different cooling fan voltages, while 18 Tc Tch R − takes over only 7.59%~24.18%. Experiment results also suggest that the overall thermal resistance of the TSVC increases with the increase of heat loads and cooling fan voltage.…”

“…The influences of heat loads and cooling capability of heat sink were considered. Numerical model has also been proposed based on FLUENT [16,18,19], to investigate the thermal hydrodynamic characteristics of the working fluid inside the TSVC. The results obtained in this paper could provide references on improving the thermal performance of this TSVC.…”

“…resistance between the evaporation section of the TSVC and the location of Ch18, while18 Tc Tch R − is the thermal resistance between the condensation section of the TSVC and the location of Ch18. It can be observed from fig.7that the thermal resistance ( 18 Th Tch R − ) between the evaporation section and Ch18 occupies more than 60% of the overall thermal resistance, R VC .…”

Thermal bridges in building envelopes – An overview of impacts and solutions

“…In 2016, the same research group published another research study [22]. The objectives of this research were the same as the previous one, but the study was extended to different building and insulation materials.…”

The Use of Aerogel-Enhanced Blanket for Thermal Bridging Correction in Concrete and Steel Buildings

“…The direct 2D and 3D method of building energy simulation are complex as well as need greater computing capacity. Another study by (Karabulut et al,2016) showed that increasing insulation layers on the exterior helps way better to reduce the thermal bridges. To see the results different configurations were taken and insulating layers were applied to the same geometry.…”