MEASUREMENT & VERIFICATION (PM&VL 7)
Product: KLIMA-PUR window frame
INDRESMAT is a company founded in 2017 and located in Barcelona (Spain) & Geleen (The Netherlands) that is redefining the thermal envelope of buildings with materials such as biobased Polyurethane window frames and insulation foam.
Mechanical, durability, vibroacoustic, thermal, and microclimate comfort tests of envelope products and their connectors. Mechanical, vibroacoustic, thermal, and structural (scanning and optical microscope, spectrometer) tests are used for ageing diagnosis.
ABOUT
Safety
Health
Efficiency
PARTNERS
Scientific partner
Cracow University of Technology
Faculty of Civil Engineering
Industrial Partner
Indresmat
Main author:
Aneta Nowak-Michta
Cracow University of Technology
DETAILED INFO
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The completed program of mechanical, durability and vibroacoustic tests as well as thermal simulations were based on the certification requirements for window frames with appropriate modifications taking into account the biopolyurethane raw material used to produce the frames and the designed solutions for their connections. The obtained results indicate a path for further research and product development and may also be used during product certification.
Design of Experiments
Low temperature cracking according to EN 12697-46 with modifications.
Durability:
- Resistance to artificial ageing by exposure to freeze-thaw according to EN 13165 with modification.
- Resistance to accelerated ageing by exposure to temperature in accordance with the requirements of EN 13165.
Diagnostics of durability due to ageing included features not defined in the standard: Mechanical test before and after artificial ageing - Strength of corners according to EN 514.
Direction-averaged junction velocity level difference for connector or for connection model according to our own procedure based on EN ISO 12354-1 and EN ISO 12354-2.
Internal surface temperature according to EN ISO 13788.
Top: Strength of corner
Middle: Low temperature cracking
Bottom: Velocity level difference
Results
Strength of the tested window frame corners is 3.3 N/mm2, 2.5 N/mm2 and 2.9 N/mm2 for reference specimens, specimens after freeze-thaw ageing and specimens after accelerated ageing, respectively. Relationships between load and vertical displacement of corners before and after ageing.
In the low temperature cracking test, the average value of maximum cryogenic stress was equal to 1.36 MPa.
Foamed (bio)polyurethane frame connections found to be acoustically stiff. Average transmission of vibration velocity in frequency domain is below 6 dB.
Relationships between load and vertical displacement of corners:
The purpose of the test was to check whether condensation and mold may occur on the inner surface of the window frame. The temperature distribution in the edge and middle element of the window frame was calculated as a 2D task. As a result of the analysis, it was found that in typical residential and office spaces with a moderate level of relative air humidity, condensation of water vapor will not occur. However, an influence of the applied specific glazing should also be checked
The temperature distribution in the edge of the window frame:
Conclusion
Both types of the used ageing procedure caused reduction in strength of the tested window frame corners.
In the low temperature cracking test, the specimens met the required evaluation criterion.
Biopolyurethane frame connections found to be acoustically stiff.
CONSTRUCTION SEGMENT
TEST CATEGORY
Mechanical and Durability
DATE
30 July, 2023