Test Report Prüfbericht

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1 Test Report Prüfbericht Qualification of a Solar Collector in accordance with Qualifizierung eines Solarkollektors nach DIN EN : 2006; DIN EN : 2006 TÜV Report No.: _1000_10hp Cologne, DAT-P-226/06-01 Publication or distribution of this report to third parties is only permissible in its complete and unabridged form. Publication or dissemination of extracts, appraisals or any other revision and adaptation hereof, in particular for advertising purposes, is only permissible on receipt of prior written agreement by the TÜV Rheinland Group. The test results presented in this report refer only to the test item. Veröffentlichung und Weitergabe an Dritte ist nur in vollständiger, ungekürzter Form zulässig. Veröffentlichung oder Verbreitung von Auszügen, Zusammenfassungen, Wertungen oder sonstigen Bearbeitungen und Umgestaltungen, insbesondere zu Werbezecken, ist nur mit vorheriger schriftlicher Zustimmung der TÜV Rheinland Group zulässig. Die in diesem Bericht dargestellten Prüfergebnisse beziehen sich ausschließlich auf den Prüfgegenstand., Köln D Köln, Am Grauen Stein, Tel.: / , Fax: /

2 2 / 18 Report-No.: _1000_10hp on Qualification of a Solar Collector in accordance with Qualifizierung eines Solarkollektors nach DIN EN : 2006; DIN EN : 2006 Client: Kunde Ako Tec Produktionsgesellschaft mbh Grundmühlenweg Angermünde Germany TÜV Quotation No.: Angebotsnummer TÜV Order No.: Auftragsnummer Order of: Datum der Beauftragung Date of Receipt of Test Item: Anlieferdatum Prüfmuster Commencement of Test: Testbeginn TÜV Client No.: Kundennummer Inspector: Prüfer Business Field: Geschäftsfeld No of Pages: Seitenzahl Appendix: Anhang 435/ J. Sommer (Tel.: ) to 18

3 3 / 18 List of Contents Inhaltsverzeichnis 1 Summary of test results Zusammenfassung Setting of tasks; Aufgabenstellung Basis of testing; Grundlagen Sampling; Probenahme Description of the collector construction; Beschreibung der Kollektorkonstruktion Measuring results of thermal performance testing; Prüfergebnisse der Leistungsprüfung von Sonnenkollektoren Test method according to DIN EN :2006 chapter 6.3; Prüfgrundlage entsprechend DIN EN :2006 Kapitel Test conditions; Prüfbedingungen General remarks; Bemerkungen...12 List of Contents Appendix Inhaltsverzeichnis - Anhang Appendix 1: Thermal performance test results 13 Appendix 2: Photo documentation 18

4 4 / 18 1 Summary of test results Zusammenfassung Qualification of a Solar Collector in accordance with Qualifizierung eines Solarkollektors nach DIN EN : 2006; DIN EN : 2006 Manufacturer Hersteller Brand Handelsname Collector type Kollektortyp Basis of testing Prüfgrundlage Test Internal pressure Innendruck High-temperature resistance Hochtemperaturbeständigkeit Exposure Exposition : Ako Tec Produktionsgesellschaft mbh : Grundmühlenweg Angermünde Germany Ako Tec : OEM Vario hp : DIN EN :2006 Start Date End Summary of main test results Zusammenfassung der Hauptergebnisse No visual damages Not performed Not performed External thermal shock 1 st Not performed Schneller Temperaturwechsel, außen 2 nd Not performed Internal thermal shock 1 st Not performed Schneller Temperaturwechsel, innen 2 nd Not performed Rain penetration Eindringender Regen Freeze resistance Frostbeständigkeit Mechanical load Mechanische Belastung Thermal performance Wärmeleistung Impact resistance (optional) Schlagfestigkeit (wahlweise) Final inspection Endüberprüfung Not performed Use of anti-freeze liquid Not performed No visual damages Not performed No visual damages All above listed tests of the standard DIN EN :2006 were passed successfully in accordance with the criteria. Alle oben aufgeführten Tests der DIN EN :2006 wurden entsprechend der Kriterien bestanden. Cologne, Responsible for collector testing Team manager Solar Thermal Energy Dipl.-Ing. J. Sommer Dipl.-Ing. U. Fritzsche

5 5 / 18 Summary of collector performance test results: Zusammenfassung der Ergebnisse der Leistungsprüfung Manufacturer Hersteller Brand Handelsname Collector type Kollektortyp Ako Tec Produktionsgesellschaft mbh Ako Tec Year of manufacture Herstellungsjahr 2009 OEM Vario hp Length Länge Width Breite Height Höhe Weight (empty) Gewicht (leer) Heat transfer medium Prüfwärmeträger 2170 mm 740 mm 117 mm 24.0 kg Water Absorber area Absorberfläche m² Aperture area Aperturfläche m² Gross area Bruttofläche m² Mass flow Massenstrom Test pressure: Prüfdruck kg/s 150 kpa Thermal performance Thermische Leistungsfähigkeit Absorber area (x A ) Aperture area (x a ) Conversion factor η 0 Konversionsfaktor Conversion factor η 0 at 15 incidence angle * Konversionsfaktor bei 15 Einfallswinkel* Heat transfer coefficient a 1 Wärmedurchgangskoeffizient W/(m²K) W/(m²K) Temperature dependent heat transfer coefficient a 2 Temperaturabhängiger Wärmedurchgangskoeffizient W/(m²K²) W/(m²K²) Output power per collector unit in W: Ausgangsleistung pro Kollektormodul in W: Irradiation Einstrahlung 0 15* 0 15* 0 15* T m T a in K 400 W/m² 394 W/m² 700 W/m² 689 W/m² 1000 W/m² 985 W/m² (at normal and 15 incidence angle) * see further information in chapter 8: general remarks (bei senkrechter und 15 Einstrahlung) * weitere Informationen in Kapitel 8: Bemerkungen

6 6 / 18 2 Setting of tasks; Aufgabenstellung A complete collector test in accordance with DIN EN :2006 of the Ako Tec Produktionsgesellschaft mbh collector OEM Vario hp should be performed with the aim of Solar Keymark certification. Es soll ein Kollektortest des Ako Tec Produktionsgesellschaft mbh Kollektors OEM Vario hp entsprechend DIN EN :2006 mit dem Ziel der Solarkeymark Zertifizierung durchgeführt werden. 3 Basis of testing; Grundlagen DIN EN :2006 Thermische Solaranlagen und ihre Bauteile- Kollektoren- Teil 1: Allgemeine Anforderungen DIN EN :2006 Thermal solar systems and components - Collectors - Part 1: General requirements DIN EN :2006 Thermische Solaranlagen und ihre Bauteile- Kollektoren- Teil 2: Prüfverfahren DIN EN :2006 Thermal solar systems and components - Collectors - Part 2: Test procedure Solar Keymark Specific Scheme Rules Final Version December 2009: Specific CEN Keymark Scheme Rules for Solar Thermal Products

7 7 / 18 4 Sampling; Probenahme Prototype samples Prototyp Samples from pilot production Prüfmuster aus der Pilotfertigung Samples from serial production Prüfmuster aus der Serienproduktion Selection of test samples acc. to Solar Keymark scheme rules Prüfmusterauswahl entsprechend der Solar Keymark Regeln 5 Description of the collector construction; Beschreibung der Kollektorkonstruktion Manufacturer Hersteller Brand name Handelsname Collector Type Kollektortyp Category Kategorie Date of manufacture Produktionsdatum Serial number Seriennummer Drawing number Zeichnungsnummer Ako Tec Produktionsgesellschaft mbh Ako Tec OEM Vario hp Heat-pipe with absorber panels /1-5 (all ) Collector & construction: Kollektor & Konstruktion Gross dimensions l x w x t [mm] Bruttofläche l x b x h 2170 x 740 x Absorber dimensions l x w [mm] Absorberfläche l x b x Anzahl 1940 x 84 (47 front + 37 back side) x 10 1 Aperture dimensions l x w [mm] Aperturfläche l x b x Anzahl 1980 x 740 x 1 1 Gross/ aperture/ absorber area [m²] Brutto-/ Apertur-/ Absorberfläche / / Weight empty [kg] Leergewicht 24.0 Fluid content [l] Flüssigkeitsinhalt Determinate by test laboratory 2 reviewed manufacturer information 3 according to manufacturer information

8 8 / 18 Absorber: Absorber Construction type Bauart Heat-pipe fin-absorber 2 Material Werkstoff copper 2 Absorber thickness [mm] Absorberdicke Surface treatment Oberflächenbehandlung Tinox 3 Absorber grid Absorbergeometrie serial 2 Number and diameter of raiser tubes and distance [mm] Anzahl und Durchmesser der Glas- oder Absorberrohre sowie der Rohrabstand 30 * Header/ connections: Sammelleitung/ Anschlüsse Dimensions of header [mm] Dimension der Sammlerleitung 35 2 No. and dimensions of connections Anzahl und Dimension der Anschlüsse 2 2 3/4 " external-thread 2 Cover: Abdeckung Number of covers Anzahl der Abdeckungen Cover thickness [mm] Dicke der Abdeckung Cover material Material der Abdeckung Solar glass 3 Cover structure Struktur der Abdeckung Anti reflex coating Determinate by test laboratory 2 reviewed manufacturer information 3 according to manufacturer information

9 9 / 18 Reflector: Reflektor Number of Reflectors Anzahl der Reflektoren 1 2 Reflector dimension and total Area Reflektors Abmaße und Gesamtfläche 1980 X 740 mm m² 1 Reflector material and coating Reflektors Material und Beschichtung multi-layer composite 2 not mentioned 2 Reflector structure Reflektors Struktur und Stärke planar Reflector wave-length and height Reflektor Wellenlänge und -höhe Thermal insulation: Wärmedämmung Thermal insulation thickness [mm] Dicke der Isolierung Insulation material Material der Isolierung Armaflex HT 2 Thermal conductivity [W/(m*K)] Wärmeleitwert (40 C) 3 Casing: Gehäuse Casing material Material des Gehäuses aluminium alloy 3 Sealing Dichtung 3 Limit values (given by the manufacturer): Grenzwerte Max. operating temperature [ C] Maximale Betriebstemperatur Maximum pressure [kpa] Maximaler Betriebsdruck Heat transfer medium Wärmeträger Water Glycol mixture 3 Other limitations Weitere Einschränkungen slope 3 Collector mounting Montagearten on roof and flat roof mounting is possible 3 1 Determinate by test laboratory 2 reviewed manufacturer information 3 according to manufacturer information

10 10 / 18 6 Measuring results of thermal performance testing; Prüfergebnisse der Leistungsprüfung von Sonnenkollektoren 6.1 Test method according to DIN EN :2006 chapter 6.3; Prüfgrundlage entsprechend DIN EN :2006 Kapitel 6.3 Serial no. Seriennummer Date (Start/End) Datum (Start/Ende) Inspector Prüfer Schaub 6.2 Test conditions; Prüfbedingungen Latitude [ ] Geographische Breite Longitude [ ] Geographische Länge Collector tilt [ from horizontal] Kollektorneigung 35 Collector azimuth [ from south] Kollektorazimut 0 Orientation of absorber or pipes Ausrichtung des Absorbers oder der Absorberröhren vertical Mass flow [kg/s] Massenstrom Aperture area A a [m²] Aperturfläche 1.465

11 11 / 18 Test results thermal performance; Prüfergebnisse Wärmeleistung Second order fit to data Ausgleichskurve 2. Ordnung für die Messwerte Q& = A G η 0 a 1 ( t t ) ( t t ) m G a a 2 m G a 2 Conversion factor η 0a [ ] Konversionsfaktor Conversion factor η 0a at 15 incidence angle[ ] Konversionsfaktor bei 15 Einfallswinkel Heat transfer coefficient a 1a [ W/(m²K)] Wärmedurchgangskoeffizient Temp. dependent heat transfer coefficient a 2a [W/(m²K²)] Temperaturabhängiger Wärmedurchgangskoeffizient Incidence angle modifier K θ (40.2 / 40.2 ) [ ] Einstrahlwinkel-Korrekturfaktor Effective heat capacity c [kj/(m²k)] Effektive Wärmekapazität Time constant τ c [s] Zeitkonstante (based on aperture area) (based on aperture area) (based on aperture area) (based on aperture area) (based on aperture area) (based on aperture area) Not necessary for quasi-dynamic test method Power curve per collector unit (for G = 1000 W/m²) Leistungskurve pro Kollektormodul power [W] (tkm-ta) [K] Maximum power [W peak ] Spitzenleistung (G=1000 W/m²) per collector unit/ pro Kollektormodul Maximum power [W peak ] Spitzenleistung (G=985 W/m²/ psi=15 ) per collector unit/ pro Kollektormodul Details of any damage and problems: Einzelheiten hinsichtlich vorhandener Fehler. No visual damages For more details about thermal performance test see Appendix 1: Thermal performance test results.

12 12 / 18 7 General remarks; Bemerkungen All results only refer to the test samples that were subjected to testing. The extended total measuring uncertainty for the outdoor performance test is: η ± 2.8 % (for irradiation levels above 700 W/m²) The longitudinal incidence angle modifier was determined with a horizontal mounted collector using the same tubes. Special IAM characteristic: This kind of collector with a flat fin absorber and a planar reflector shows a special IAMcharacteristic. Only at normal incidence, the reflector is not in operation: Because of that, the point of maximum output power lies between 10 and 20 transversal angle. Following EN , the conversion factor out of quasi-dynamic test procedure will be calculated for an incidence angle of 15. This angle will typical be divided into 10.7 longitudinal and 10.7 transversal incidence angle. For simulation calculation, where the complete incidence angle modifier will be taken into account, the conversion factor at normal incidence needs to be used. The point of maximum output power will be described with the conversion factor at 15 incidence angle.

13 13 / Appendix 1: Thermal performance test results Evaluation of quasi-dynamic collector test based on aperture area and mean temperature of heat transfer fluid (multi linear regression/ simulation) Based on aperture area: Aperture collector area used for curve: m² The quasi-dynamic collector model is defined by Q/A a = F (τα) en K θb (θ) G b + F (τα) en K θd (θ) G d - c 6 ug* - c 1 (t m -t a ) - c 2 (t m -t a )² - c 3 u(t m -t a ) - c 4 (E L -σt 4 a ) - c 5 dt m /dt Mass flow during test [kg/s] Operating pressure during test [kpa] 150 Based on aperture area Value Unit F (τα) en [ ] K θd [ ] b 0 ( θ ) [ ] c [W/(m²K)] c [W/(m²K²)] c 3 not determined [J/(m³K)] c 4 not determined [W/(m²K)] c [kj/(m²k)] c 6 not determined [s/m] Angle [ ] K θ b longi () [ ] K θ b trans () [ ] Incidence angle modifier K θ (40.2 / 40.2 ) [ ] Einstrahlwinkel-Korrekturfaktor (based on aperture area)

14 14 / 18 Comparison between measurement and regression (see Figure A1.4): Total energy deviation [%] 0.63 Objective [%] 3.90 The objective describes the ratio of the integrated absolute energy difference between measurement and simulation/ regression to the total measured energy during the complete test sequence. Calculation of collector parameters Conversion factor η 0 = F (τα) en K θb (θ l,t =15.0 ) F (τα) en K θd (θ) 0.15 Heat transfer coefficient a 1 Temperature dependent heat transfer coefficient a 2 Effective heat capacity c = c1 = c2 = c5 Presentation of the used data set for regression beam solar irradiance [W/m²] incidence angle transversal [ ] gure A1.1: Direct solar irradiance over its incidence angle Fi

15 15 / diffuse solar irradiance Gd [W/m²] Global solar irradiance [W/m²] Figure A1.2: Diffuse solar irradiance over global irradiance temperature difference between mean collector and ambient [K] Global solar irradiance G* [W/m²] Figure A1.3: Temperature difference between mean collector and ambient temperature over global irradiance

16 16 / output power [W/collector unit] timecode [s] Q_Measure [W] Q_Reg [W] Figure A1.4: Measured and calculated power over time (full data set) incidence angle modifier [ ] incidence angle [ ] longi trans Figure A1.5: incidence angle modifier over incidence angle

17 17 / efficiency [ ] Reduced temperture difference T*m [K*m²/W] Figure A1.6: efficiency curve over reduced temperature difference at 1000W/m² irradiation efficiency [ ] Reduced temperture difference T*m [K*m²/W] Figure A1.7: efficiency curve over reduced temperature difference at 800W/m² irradiation

18 18 / Appendix 2: Photo documentation Fig. 1: performance test