evacuated tube collectors

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Evacuated tube collectors

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Evacuated tube collectors

The overall performance of ecological heating systems based on solar ther-mal energy is significantly dependent on how efficiently the solar collector converts sunlight into energy. The evacuated tube collectors offered by the Ritter Gruppe lead this sector.

This is primarily thanks to their innovative design which is the result of many years of research and technological innovations. The result: using the evacuated tube collector manufactured by the Ritter Gruppe, it is pos-sible to achieve significantly higher energy yields than with other conven-tional collectors.

Other system suppliers also benefit from this efficiency when they inte-grate Ritter Gruppe collectors as OEM (Original Equipment Manufacturer) products in their solar thermal heating systems. Customised requirements on design can be realised by designers at the Ritter Gruppe as can techni-cal modifications or specifications.

Apart from perfect compatibility, the OEM collector of Ritter is also convin-cing thanks to its careful workmanship, durability, high-quality design and a fair price/performance ratio.

Consistently high quality in series production, maximum flexibility during order processing and optimum adherence to deadlines are what distin-guish OEM products offered by the Ritter Gruppe.

The “Ritter collector” is regarded by experts in the sector as being syn-onymous with outstanding quality. Ritter Gruppe customers also include renowned companies in the heating industry who rely on this outstanding quality.

RecognisedAll collectors are produced in Dettenhausen fulfill the requirements of the EN 12975 and are awarded with the Solar Keymark label.

Ritter collectors have received the very best evaluations by the German “Stiftung Warentest”, as well as from various consumer and environmental magazines.

The collector AQUA PLASMA and CPC azzurro, which are manufactured for Paradigma, were awarded for their outstanding design with the IF Designaward in 2013 and with the Design Award of the German Industrial Forum.

Ecological consequentEcology is close to our heart and technology is our passion. Together, they determine the way we act in the Ritter Gruppe. And this has been the case since the company was first established in 1988. We think and work in an ecologically consequent manner, i. e. “ecoquent”, and develop our products accordingly.

This philosophy makes us one of the most innovative companies in the solar thermal energy sector. These results are an incentive for us to strive towards even more innovation: for our customers and for the sake of the environment.

Evacuated tube collectors

The Ritter Gruppe is one of the leading manufacturers of highly efficienty evacuated tube collectors.

Ritter collectors can be used for hot water preparation, heating support, process heat, district heating and solar cooling.

OEM 21Colour of aluminium frame profile, anodised: Natural anodised (aluminium grey)Pipe material: copper

CPC 6 OEM, CPC 12 OEM, CPC 18 OEMColour of aluminium frame profile, anodised: Natural anodised (aluminium grey)Pipe material: copper

CPC 6 INOX, CPC 12 INOX, CPC 18 INOXColour of aluminium frame profile, powder-coated: RAL 7015 Pipe material: stainless steel

CPC 6 XL INOX, CPC 12 XL INOXColour of aluminium frame profile, powder-coated: RAL 7015Pipe material: stainless steel

Performance and quality speak by themselves

Ritter evacuated tube collectors consist of the following components.

The evacuated tube

The evacuated tube is optimized in geometry and performance.

The evacuated tubes consist of two concentric glass tubes. On one side, the glass tubes are sealed in a semi-circular shape and joined to one another on the other side. The space between the tubes is evacuated an the hermetically sealed (vacuum insulation).

The highly selective absorber (aluminum nitrite sputter layer) covers the external surface of the internal glass tube.

Due to the circular absorber design of the vacuum tubes, the tubes always work with ideal orientation to the sun.

Everlasting vacuum leak proof due to pure glass connection between inner and outer glass tube, no glass-metal transitions, thermos flask principle. A preassembled barium getter in each tube allows fast indication of the vacuum inside.

The CPC reflector

In order to increase the efficiency of the evacuated tubes, a highly reflective , weather-proof CPC reflector (Compound Parabolic Concentrator) is placed behind the evacuated tubes (except for the collector OEM 21). The optimised reflector geometry of the reflec-tor ensures that even at unfavorable irradiation angles direct and diffuse sunlight falls onto the absorber. Due to the optimised reflector geometry of the reflector the energy yield is almost the same during the day.

Manifold and heat transfer unit

The manifold contains the insulated collecting and distributing pipes.

Each evacuated tube contains a U-pipe that is directly flown through by the heat transfer medium. The U-pipe is connected to the collecting or distributing pipe. It is also pressed against the inside of the tube with the heat transfer plates.

Features:

Engineering• Hailsafeandthermalshocktested• Theheattransfermediumflowsthroughthecollectorwithouttheuse of a heat exchanger• Thehydraulicconnectionsofthecollectorareextremelysafe.Theyare made of a long-lasting, metallic sealing which is free from wear and gas-tight.• Largecollectorareaupto13m²canbeconnectedinseries (less pressure loss; requires a 6m pump)• Thewholecollectorconstructionisfullyrecyclable

Easy to assembly•Shortassemblytimethroughpreassembledcollectorsanduser-friendly mounting kits• Easyconnectionmethodforadd-oncollectorsthroughpreassembled connection fittings. No additional piping or insulation is required• Flexiblehydraulicconnectionduetothesymmetricalcollectordesign: the sensor can be placed on the left or on the right side• Optionallocationoftheflowandreturnconnectionatbothsidesofthe collector.• Safehandling:thecollectorsedgesarefittedwithplasticprofilesand the edges of the CPC reflector are mounted in the aluminium frame to avoid injuries during installation • Thecollectorisdeliveredwithasunprotectionfoiltoallowcommissio ning even at full sunlight• Carryingstrapsattachedtothecollectorensureasaveandeasyhand- ling on the roof and can be used as transport straps for a crane as well• TheabsenceofaCPCreflectormakesthecollectorOEM21perfectly suitable for a horizontal installation

Easy to service• EasyandfastreplacementofthetubesandoftheCPCreflectorwithout using tools and even without draining the system • Duetothedryconnection,itisnotnecessarytodrainthesystemin order to replace a tube • Simpleandhomogeneousrecyclingoftheindividualcomponents

Others• Extremelyhighenergyyieldwithasmallcollectorgrossarea• Minimalheatlossesevenwithverycoldambienttemperatureandhigh collector temperature• Longservicelifeandhighseriesquality• Highoperationsecurityandlonglifeserviceduetotheuseofhigh quality and anti-corrosion materials• Highoperationsafetyduetothedryconnectionofthetubestothe solar circuit

Power curves

ΔT = TCollector – TAmbient air [K]

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6,12,18 OEM / INOX

(G = 1.000 W/m2)

Series CPC 6 INOX CPC 12 INOX CPC 18 INOX CPC 6 XL INOX CPC 12 XL INOX CPC 6 OEM CPC 12 OEM CPC 18 OEM OEM 21

Number of evacuated tubes 6 12 18 6 12 6 12 18 21

η0 in relation to aperture, EN 12975 % 64.2 64.2 64.2 64.2 64.2 64.2 64.2 64.2 74.5

a1 with wind, in relation to aperture W/(m2K) 0.885 0.885 0.885 0.885 0.885 0.885 0.885 0.885 2.007

a2 with wind, in relation to aperture W/(m2K2) 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.005

Yield forecast kWh(m2a) 651 651 651 651 651 651 651 651 780(location Würzburg, Germany, reference area 3 m2)

Yield forecast kWh(m2a) 589 589 589 589 589 589 589 589 619(location Würzburg, Germany, reference area 5 m2)

Grid dimensions (length x height x depth) m 0.70 x 1.64 x 0.1 1.39 x 1.64 x 0.1 2.08 x 1.64 x 0.1 0.70 x 2.06 x 0.1 1.39 x 2.06 x 0.1 0.70 x 1.64 x 0.1 1.39 x 1.64 x 0.1 2.08 x 1.64 x 0.1 1.45 x 1.64 x 0.10

Gross surface area m2 1.15 2.28 3.41 1.44 2.86 1.15 2.28 3.41 2.37

Aperture area m2 1.0 2.0 3.0 1.28 2.57 1.0 2.0 3.0 1.33

Collector contents l 0.87 1.74 2.61 1.07 2.12 0.77 1.54 2.31 2.48

Weight kg 18.7 35 49.3 22.4 41.8 19.5 36.2 54.2 51

Max. working overpressure bar 10 10 10 10 10 10 10 10 10

Max. stagnation temperature °C 272 272 272 272 272 272 272 272 220

Connection diameter, compression fitting mm 15 15 15 15 15 15 15 15 15

Sensor sleeve mm 6 6 6 6 6 6 6 6 6

Collector material Al / brass / Cu / stainless steel / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / stainless steel / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / glass / silicone / PBT / EPDM / TPE

Glass tube material borosilicate glass 3.3 borosilicate glass 3.3 borosilicate glass 3.3 borosilicate glass 3.3

Selective absorber coating material aluminium nitride aluminium nitride aluminium nitride aluminium nitride

Glass tube (Ø ext./Ø int./wall thickness/tube len.) mm 47/36.2/1.6/1503 47/36.2/1.6/1920 47/36.2/1.6/1503 47/36.2/1.6/1503

Colour (aluminium frame profiles) RAL 7015 RAL 7015 natural anodised (aluminium grey) natural anodised (aluminium grey)

Colour (plastic parts) black black black black

Thermal shock test according to DIN EN 12975-2 ITW-test no. 06COL513/3 06COL513/3 06COL513/3 06COL517/1

HailstonetestaccordingtoDINEN12975-2 TÜV-testno. 435/142448 435/142448 435/142448 435/142448

Other tests and approvals EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001

Type conformity according to 97/23/EG Z-IS-DD1-STG-11-04-100029919-002 Z-IS-DD1-STG-11-04-100029919-002 Z-IS-DD1-STG-11-04-100029919-004 Z-IS-DD1-STG-11-04-100029919-004

DIN CERTCO - registration number 011-7S134R 011-7S134R 011-7S113R 011-7S114R

ΔT = TCollector – TAmbient air [K]

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6,12 XL INOX

(G = 1.000 W/m2)

Series CPC 6 INOX CPC 12 INOX CPC 18 INOX CPC 6 XL INOX CPC 12 XL INOX CPC 6 OEM CPC 12 OEM CPC 18 OEM OEM 21

Number of evacuated tubes 6 12 18 6 12 6 12 18 21

η0 in relation to aperture, EN 12975 % 64.2 64.2 64.2 64.2 64.2 64.2 64.2 64.2 74.5

a1 with wind, in relation to aperture W/(m2K) 0.885 0.885 0.885 0.885 0.885 0.885 0.885 0.885 2.007

a2 with wind, in relation to aperture W/(m2K2) 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.005

Yield forecast kWh(m2a) 651 651 651 651 651 651 651 651 780(location Würzburg, Germany, reference area 3 m2)

Yield forecast kWh(m2a) 589 589 589 589 589 589 589 589 619(location Würzburg, Germany, reference area 5 m2)

Grid dimensions (length x height x depth) m 0.70 x 1.64 x 0.1 1.39 x 1.64 x 0.1 2.08 x 1.64 x 0.1 0.70 x 2.06 x 0.1 1.39 x 2.06 x 0.1 0.70 x 1.64 x 0.1 1.39 x 1.64 x 0.1 2.08 x 1.64 x 0.1 1.45 x 1.64 x 0.10

Gross surface area m2 1.15 2.28 3.41 1.44 2.86 1.15 2.28 3.41 2.37

Aperture area m2 1.0 2.0 3.0 1.28 2.57 1.0 2.0 3.0 1.33

Collector contents l 0.87 1.74 2.61 1.07 2.12 0.77 1.54 2.31 2.48

Weight kg 18.7 35 49.3 22.4 41.8 19.5 36.2 54.2 51

Max. working overpressure bar 10 10 10 10 10 10 10 10 10

Max. stagnation temperature °C 272 272 272 272 272 272 272 272 220

Connection diameter, compression fitting mm 15 15 15 15 15 15 15 15 15

Sensor sleeve mm 6 6 6 6 6 6 6 6 6

Collector material Al / brass / Cu / stainless steel / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / stainless steel / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / glass / silicone / PBT / EPDM / TPE Al / brass / Cu / glass / silicone / PBT / EPDM / TPE

Glass tube material borosilicate glass 3.3 borosilicate glass 3.3 borosilicate glass 3.3 borosilicate glass 3.3

Selective absorber coating material aluminium nitride aluminium nitride aluminium nitride aluminium nitride

Glass tube (Ø ext./Ø int./wall thickness/tube len.) mm 47/36.2/1.6/1503 47/36.2/1.6/1920 47/36.2/1.6/1503 47/36.2/1.6/1503

Colour (aluminium frame profiles) RAL 7015 RAL 7015 natural anodised (aluminium grey) natural anodised (aluminium grey)

Colour (plastic parts) black black black black

Thermal shock test according to DIN EN 12975-2 ITW-test no. 06COL513/3 06COL513/3 06COL513/3 06COL517/1

HailstonetestaccordingtoDINEN12975-2 TÜV-testno. 435/142448 435/142448 435/142448 435/142448

Other tests and approvals EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001 EN 12975, RAL UZ 73, Solar Keymark · ISO 9001

Type conformity according to 97/23/EG Z-IS-DD1-STG-11-04-100029919-002 Z-IS-DD1-STG-11-04-100029919-002 Z-IS-DD1-STG-11-04-100029919-004 Z-IS-DD1-STG-11-04-100029919-004

DIN CERTCO - registration number 011-7S134R 011-7S134R 011-7S113R 011-7S114R

ΔT = TCollector – TAmbient air [K]

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OEM 21

(G = 1.000 W/m2)

FO-000

1V4

.201/14

UK

RitterEnergie-undUmwelttechnikGmbH&Co.KG

Kuchenäcker 2 D-72135 Dettenhausen

Telefon +49 7157 5359-24 Fax +49 7157 5359 1209-20 Email: [email protected]

Homepage:www.ritter-gruppe.com