Hot box investigations and theoretical assessments of miscellaneous vacuum insulation panel configurations in building envelopes

Abstract

Vacuum insulation panels (VIPs) are regarded as one of the most promising existing high performance thermal insulation solutions on the market today as their thermal performance typically range 5 to 10 times better than traditional insulation materials. However, the VIPs have several disadvantages such as risk of puncturing by penetration of nails and that they cannot be cut or fitted at the construction site. Furthermore, thermal bridging due to the panel envelope and loadbearing elements may have a large effect on the overall thermal performance. Finally, degradation of thermal performance due to moisture and air diffusion through the panel envelope is also a crucial issue for VIPs. In this work, laboratory investigations have been carried out by hot box measurements. These experimental results have been compared with numerical simulations of several wall structure arrangements of vacuum insulation panels. Various VIP edge and overlap effects have been studied. Measured U-values from hot box VIP large scale experiments correspond well with numerical calculated U-values when actual values of the various parameters are used as input values in the numerical simulations.

Experimental investigations of aerogel-incorporated ultra-high performance concrete

“…PCM by itself is not an insulation material in principle but may still be an important part of the thermal building envelope. At our lab, both theoretical [2][3][4][5][6][7] and experimental work [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] were conducted alongside to derive new materials that go beyond these state-of-the art materials, thus dawning the birth of the concepts such as nano insulation materials (NIM) through the utilization of the Knudsen effect [24][25][26][27][28][29][30], where experimental investigations so far have concentrated about making hollow silica nanospheres (HSNS) [30][31][32][33][34][35][36][37][38], thus enabling thermal insulation and improved energy efficiency from a 'nano' perspective.…”

Improving thermal insulation of timber frame walls by retrofitting with vacuum insulation panels – experimental and theoretical investigations

“…The low temperatures in the simulations may be caused by the application of the VIP upper limit declared thermal conductivity of 0.005 W/(mK) (Porextherm, 2009), as the real thermal conductivity may be as low as 0.004 W/(mK) (Binz et al, 2005). Measurements have shown that both the conductivity and the thickness of different VIPs may vary, e.g., Grynning et al (2010) measured conductivities somewhat higher than the declared ones and panel thicknesses that were less than stated.…”

Integrated Measuring and Control System for Thermal Analysis of Buildings Components in Hot Box Experiments

“…Therefore, the literature review shows that the calibrated hot box is the most used [3,4,6,13,17,19,20,[23][24][25][26]28,30,32,33,36,37] followed by the guarded hot box [5,7,14,15,18,21,22,29,31,34,35] and the simple hot box [16,27,38]. The measuring systems always employ analog probes and the thermocouples are more widely used [3][4][5][6][13][14][15][16]18,[21][22][23][24][25][26][27]29,31,[33][34]…”