Study of the edge thermal bridging effect in vacuum insulation panels: steady and unsteady-state approaches using numerical and experimental methods

2021 ◽  
pp. 111821
Author(s):  
Márcio Gonçalves ◽  
Nuno Simões ◽  
Catarina Serra ◽  
Inês-Flores-Colen ◽  
Kenny Rottenbacher ◽  
...  
Keyword(s):  
Experimental Methods ◽  
Unsteady State ◽  
Vacuum Insulation ◽  
Thermal Bridging

scholarly journals Experimental and numerical investigation of thermal bridging effects of jointed Vacuum Insulation Panels

2016 ◽  
Vol 111 ◽  
pp. 164-175 ◽  
Author(s):  
Alice Lorenzati ◽  
Stefano Fantucci ◽  
Alfonso Capozzoli ◽  
Marco Perino
Keyword(s):  
Numerical Investigation ◽  
Vacuum Insulation ◽  
Thermal Bridging

Thermal evaluation of a highly insulated steel stud wall with vacuum insulation panels using a guarded hot box apparatus

2020 ◽  
pp. 174425912098003
Author(s):  
Travis V. Moore ◽  
Cynthia A. Cruickshank ◽  
Ian Beausoleil-Morrison ◽  
Michael Lacasse
Keyword(s):  
Thermal Resistance ◽  
Air Temperature ◽  
Building Code ◽  
Interior Surface ◽  
Vacuum Insulation ◽  
Industry Standard ◽  
Thermal Bridging ◽  
Standard Calculation ◽  
Wall Assembly ◽  
Steel Stud

This paper presents the results of a Guarded Hot Box (GHB) experiment on a wall assembly made up of both steel stud framing and an external insulating assembly which incorporates vacuum insulation panels (VIPs) for which knowledge of the composition of the VIP barrier foil is not readily available. The purpose of the tests is to provide an experiment result for thermal resistance of a wall assembly containing several sources of thermal bridging, including those due to the barrier foil at the edge of and joint material between the VIPs and the condensation potential on the interior surface due to the steel studs. The steady-state GHB experiments were completed in accordance with ASTM C1363 for an interior air temperature of 20.9°C and an exterior air temperature of −34.9°C; this resulted in a thermal resistance for the wall assembly of 6.8 ± 0.8 m2 K/W. Surface temperature measurements on a VIP in the wall assembly indicated that increased levels of heat transfer were occurring at the edges of the VIPs as compared to the center of the panel confirming thermal bridges were present at the panel edge. Measurement of the temperature on the interior surface of the sheathing board around the steel stud indicated that the external insulation effectively minimized the risk of condensation due to the steel studs. Determining the thermal resistance and condensation risk for a wall assembly which contains VIPs for which knowledge of the barrier film is not readily available demonstrates the potential for use of such a wall assembly according to energy and building code requirements. The wall assembly and test details can also be used to compare industry standard calculation methods and detailed 2D and 3D simulations to the GHB test result. The comparison can be used to inform on the validity of using calculations and simulation methods in lieu of testing for energy and building code compliance. The comparison of calculations and simulations is not the scope of the work presented in this paper and will be explored in future publications.

scholarly journals Vacuum Insulation Panels: Thermal Bridging Effects and Energy Performance in Real Building Applications

2015 ◽  
Vol 83 ◽  
pp. 269-278 ◽  
Author(s):  
Francesco Isaia ◽  
Stefano Fantucci ◽  
Alfonso Capozzoli ◽  
Marco Perino
Keyword(s):  
Energy Performance ◽  
Vacuum Insulation ◽  
Thermal Bridging ◽  
Real Building

ANALISIS VARIASI JUMLAH SUDU TURBIN BERPENAMPANG PELAT DATAR PADA TURBIN AIR ALIRAN VORTEX DENGAN TIPE SALURAN MASUK INVOLUTE

2020 ◽  
Vol 7 (2) ◽  
pp. 72-78
Author(s):  
Adnan Al Farisi ◽  
Yopi Handoyo ◽  
Taufiqur Rokhman
Keyword(s):  
Power Plant ◽  
Alternative Energy ◽  
Vortex Flow ◽  
Experimental Methods ◽  
Turbine Efficiency ◽  
A Value ◽  
Current Voltage ◽  
Materials Research ◽  
The One ◽  
Flow Vortex

The One of alternative energy that is environmentally friendly is by untilize water energy and turn it into a Microhydro power plant. Microhydro power plant usually made from utilize the waterfall with the head fell. While utilization for streams with a head small drop is not optimal yet. This is a reference to doing research on harnessing the flow of a river that has a value of head low between 0.7 m – 1.4 m with turning it into a Vortex flow (vortex). The purpose of this research is to know  the effect variation number of blade on power and efficiency in the vortex turbine. This research uses experimental methods to find current, voltage, torque and rpm using a reading instrument. The materials research vortex turbine used 6 blade, 8 blade and 10 blade with flat plate. The result showed the highest efficiency is 29,93 % with produce turbine power is 19,58 W, generated on turbine with variation 10 blade with load 3,315 kg and the capacity of water 10,14 l/s. Followed with an efficiency 24,17% and produce turbine power is 15,81 W, generated on turbine with the variation 8 blade with load 3,315 kg and the capacity of water is 10,14 l/s. The the lowest turbine efficiency 22,32% with produce tuebine power 14,60 W, generated on turbine with the variation 6 blade with load 3,315 kg, the capacity of water is 10,14 l/s.

Two Dimensional Unsteady State Mathematical Model for dispersion of Chlorine in Water in a Channel

2011 ◽  
Vol 3 (8) ◽  
pp. 503-505
Author(s):  
Jaipal Jaipal ◽  
◽  
Rakesh Chandra Bhadula ◽  
V. N Kala V. N Kala
Keyword(s):  
Mathematical Model ◽  
Two Dimensional ◽  
Unsteady State
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