Thermo-physical properties of polyester fiber reinforced fumed silica/hollow glass microsphere composite core and resulted vacuum insulation panel

Fabrication and characterization of low-cost and green vacuum insulation panels with fumed silica/rice husk ash hybrid core material

“…Both the composition and microstructure of the HCMs are designed carefully to achieve a uniform and nanoporous structure through blending various additive amounts of coarse and fine particles. Many researchers have investigated the thermo-physical properties of diverse alternative cheap fillers such as expanded perlite [20,21], hollow glass microspheres [22], house dust [21], fly ash [21], xonotlite [23], pumice [24,25] and zeolite [24,25], as the VIP core material, without a sacrifice of their service performance. These fillers were given full consideration as the second phase alternative materials for FS or SA based VIPs, but the achieved λ tot and cost are still high for their widespread uses.…”

Cellulosic-crystals as a fumed-silica substitute in vacuum insulated panel technology used in building construction and retrofit applications

“…Pore-structures are spherical and linked in three-dimensional networks with numerous dead-ends [30], leading to an emergent inefficiency of conduction, and a suppression of convection to an idealised case. The interaction physics were covered extensively in the works of Kwon et al [30], Kim and Song [31], and Li et al [23].…”

“…Li et al completed two studies, the first assessing the impact of fumed silica hybrid materials [23], the second investigating inclusion of rice husk ash [24]. In both articles, samples combined with varying fumed silica ratios were tested in a range of vacuum pressure set points to assess thermo-physical property impact.…”

“…Being the constituent that incorporates the bulk of the VIP embodied energy, recent research advances have focussed on VIP core innovations, including studies by Nemanic et al [19], Nemanič and Žumer [20], Chen et al [21], Li et al [22][23][24], Chang et al [25], and Choi et al [26]. Albeit comprehensive, the focus of these articles leaned towards the physical impacts of fumed silica based core material innovations.…”

“…Pore-structures are spherical and linked in three-dimensional networks with numerous dead-ends [30], leading to an emergent inefficiency of conduction, and a suppression of convection to an idealised case. The interaction physics were covered extensively in the works of Kwon et al [30], Kim and Song [31], and Li et al [23].The modelling of VIPs involves reduction of thermal conductivity via manipulation of individual heat transfer modes, and quantifying impact takes into account all of these as they are coupled; i.e. changing the infrared absorbency consequently impacts solid conductivity.…”