Q2. What are the future works in "Vacuum insulation panel products: a state-of-the-art review and future research pathways" ?
Other interesting materials that may compete with VIPs in the future will be mentioned in the following chapters. As a technology with the same fragility and lack of flexibility as VIPs, but still showing a higher thermal conductivity, the future of GFPs is questionable ( Baetens et al. [ 4 ] ). 4. 2 Possible future research on current VIP technologies 4. 2. 1 Various requirements When addressing the future possibilities of VIPs the problem areas of today should be considered.
Q3. What is the effect of radiation on the thermal conductivity of a vacuum panel?
Seeing as the heat transfer through gas conductivity in a vacuum panel is especially low, the contribution from radiation will give a significant increase in the total thermal conductivity.
Q4. What is the way to insulate the facade?
Insulating the outer facades is beneficial for the reduction of thermal bridging, and can be made easy by using adhesives to stick the VIPs to the facade.
Q5. Where do studies on VIPs have been conducted?
central European countries such as Germany and Switzerland, where most studies on VIPs have been conducted, rely more on massive structures like brick and concrete for housing purposes.
Q6. What is the largest potential sector for energy savings?
In the European Union buildings represent 40% of the total energy usage, and the existing building stock represents the single largest potential sector for energy savings.
Q7. Why do they use glass fibre cored VIPs?
Because of its high thermal stability, Araki et al. [2] have investigated the use of glass fibre cored VIPs for high-temperature applications.
Q8. How did the wall achieve a Uvalue of 0.143 W/m 2 K?
With 100 mm mineral wool retrofitted with 30 mm VIPs, the wall achieved an Uvalue of 0.143 W/(m 2 K) for VIPs in pristine condition.
Q9. What are the common uses of VIPs?
3.1 Vacuum insulation panel productsVacuum insulation panels (VIP) are most commonly used for shipping containers for temperature sensitive materials, domestic appliances like freezers etc.
Q10. How can the authors reduce the thermal conductivity of a VIP?
Further reduction of the thermal conductivity may be achieved through reducing theheat loss from conduction in the solid material and the radiative heat transfer through the voids in a VIP.
Q11. What is the main reason why VIPs are used in buildings?
VIPs enable highly insulated constructions for walls, roofs and floors, especially within refurbishing of older buildings where space is often limited.
Q12. How long does a VIPs life under certain conditions?
Today most VIPs using a MF3 laminate can be said to have a lifetime of over 25 years under specific conditions (Simmler et al. [53], Baetens et al. [5] and Heinemann et al. [25]).
Q13. How long does it take to install a glass fibre cored vacuum insulation panel?
The core material itself is relatively inexpensive, but Di et al. [15] concluded that the lifetime expectancy for a glass fibre cored vacuum insulation panel is about 15 years.
Q14. how is fumed silica a good thermal insulation material?
it is a common solution to add opacifiers to the fumed silica for it to reach an initial thermal conductivity around 0.004 W/(mK).
Q15. What are the main components that lead to and maintain the low thermal conductivity of VIPs?
As mentioned earlier the two main components that lead to and maintain the low thermal conductivity of VIPs are the core and the envelope.