How to identify a high quality VIP
How to identify a high quality VIP - methods and techniques to guarantee high quality in production and application - Gregor Erbenich Porextherm Dämmstoffe GmbH Heisinger Straße 8 D-87437 Kempten Tel.: +49 (0) 831 / 57 53 60 Fax: +49 (0) 831 / 57 53 63 e-Mail:gregor.erbenich@porextherm.com Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What is the difference between? vs. Nobody asks: How long does it keep vacuum? How can I control the vacuum? Does it work properly? Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What determines the quality of a VIP? main parameters Raw materials ⇒ e.g. quality of fumed silica (surface), open cell foam (cell size, open cell content) Moisture content of raw materials Humidity in production and raw material storage facilities Barrier properties of film Quality of sealing Vacuum level Density of core Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Quality testing before, during and after production What can be done? – Who can do it? Before production Raw materials ⇒ e.g. quality of fumed silica, open cell foam Moisture content of raw materials Barrier properties During production Humidity in production vacuum level quality of sealing density of core After production Before shipment Visual check Haptics check Dimension check Internal pressure Thermal conductivity Producer Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH After shipment Before use Visual check Haptics check Dimension check Internal pressure ? Thermal conductivity ? Customer 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Can VIP quality be measured? main requirements Thermal conductivity Internal pressure Thermal Conductivity [mW/(m*K)] 40 fumed silica 35 open cell PU-foam 30 25 open cell PS-foam 20 precipitated silica 15 glass fiber 10 PU-foam without vacuum 5 0 0,01 0,1 1 10 100 1000 Pressure [mbar] Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Can VIP-quality be measured? Overview of test methods for thermal conductivity Method Measuring procedure direct Guarded hot plate method Hot box method What is required to determine thermal conductivity? indirect X Heat Flow method Measured parameter Amount of heat Q X X Temperature difference ∆T Calibration standard Heat transfer coefficient U Insertion of solid bodies method X Heat flow Calibration (λ vs. p for membrane and λ vs. p for VIP) Measurement effusivity X Thermal effusivity E Different parameters Foil lift-off method X Interior gas pressure p Laser distance measurement Calibration curve λ vs. p for VIP Gas pressure sensor X Interior gas pressure p Calibration curve λ vs. p for VIP Gas volume sensor X Gas volume Oxidisable surface (only good / bad verdict possible) Heat Flow comparison method X Heat flow Reference VIPs for calibration curve Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Guarded hot plate method Source: LaserComp USA Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Guarded hot plate method Function Energy that flows through the specimen/sample at defined surface temperatures (hot and cold plate) and specimen thickness is measured. Thermal conductivity is calculated out of these values independently on material and thickness Due to extremely low heat flow through a VIP, stabilization takes quite long Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Guarded hot plate method Advantages Disadvantages Very accurate/direct measurement of thermal conductivity. All parameters are known or determined automatically Very slow. ~ 1 – 1,5 h per measurement Nearly no limitation (max. 760 mm width) of specimen size and thickness Not mobile Expansive devices (52.000 – 100.000 $) Easy to handle, comfortable Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Foil lift-off method Source: The Vac Company GmbH Device installed in vacuum chamber Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH External „suction bell“ device 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Foil lift-off method Function Vacuum chamber VIP will be placed in evacuation chamber (or under suction bell) Pressure inside the chamber will be reduced until gas pressure inside the VIP is higher than pressure inside the chamber Laser device pchamber Foil lift-off will be detected by a laser device and pressure level will be determined automatically Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH Barrier film pVIP VIP 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Fixing plate Create space – save energy with Vacupor® VIPs Main VIP test methods Foil lift-off method Advantages Disadvantages Very accurate measurement of internal pressure with chamber installed version Reasonable fast ~ 2 – 5 min (in vacuum chamber) per measurement Nearly no limitation of specimen size and thickness Not mobile „mobile version“ is not really mobile. Double check necessary due to adhesion of barrier film to core Reasonable expansive for 100% testing, too slow or chamber blocked for production Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Insertion of solid body method external measurement head internal sensor disk 30 mm vacuum panel source: Va-Q-tec Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Main VIP test methods Insertion of solid body method 50 45 40 35 30 25 20 15 10 5 0 0,01 λp TC - fumed silica [mW/(m*K)] TC - fleece [mW/(m*K)] Function 0,1 1 10 100 1000 20 18 16 14 12 10 8 6 4 2 0 0,01 0,1 1 10 100 Pressure [mbar] Pressure [mbar] λfleece p p λinsert = λVIP Measurement can be influenced by: - Different temperature - Airflow - Incomplete surface contact - Quality of fleece (porosity, density, moisture content etc.) Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 1000 Result can be influenced by: - Core quality / formulation - Density - Moisture content etc. 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs main VIP test methods Insertion of solid body method Advantages Disadvantages Fast measurement defined conditions for measurement absolutely necessary Very accurate measurement of internal pressure under defined conditions! no limitation of specimen size and thickness comparable cheap Calibration curves necessary for calculate thermal conductivity value. not “commercial” available, due to patent situation not standardized/normed Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Interim conclusion Various methods are available, but … either to slow, to expansive, too sensitive (temperature etc.), not mobile or fast enough, but … indirect measurements, too sensitive (needs defined measurement conditions) not reliable enough not “free” available not contact free Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What would be desirable The ideal measurement device Measurement device / sensor for thermal conductivity and inner pressure very accurate contact free / remote monitoring independent of external influences (temperature, airflow etc.) saved historic values “on board” for serious lifetime calculation small / light weight easy to handle reasonably priced Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Cross-linked quality system Quality certification Measurement devices Customer training Product protection Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence Quality certification ⇒ e.g. ISO 9001 DIN EN ISO 9001:2000 Zertifikat: 01 100 030449 External control of producers ⇒ e.g. compulsory in connection with DIBt approval Ü-Label Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence Quality label ⇒ RAL – VIP quality label labeling / handling instructions Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence panel protection Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence panel protection protection layer – rubber granule mat protection layer – EPS Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence source: Polywert panel protection protection layer – XPS Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH protection layer – Polyester fiber mat 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence source: Vaku-Isotherm panel protection with PVC-frame plaster-based sheeting Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs What can be done Solutions, to increase quality level and customer confidence training Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Conclusion Lot of suitable measurement devices are available, but a very accurate, robust, reliable, easy to handle and reasonable cheap system is not available yet. Quality is not create by measurements but in a serious, controlled production and production process Quality can only be obtained by users that are aware of the sensitivity of the product Sensitivity of the product can be reduced by intelligent protection High quality can only be achieved by producers with an extremely high quality approach and customers/users that know and respect the limitations of the product. Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs Thank you for your attention Gregor Erbenich Global Marketing Manager Porextherm Dämmstoffe GmbH 9th International Vacuum Insulation Symposium The Royal Institution of Great Britain 17 and 18 September 2009 London, UK Create space – save energy with Vacupor® VIPs
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