Evacuated Tube Collector Without CPC-Reflector

Basic Info

Model No.: U1521

Type: Vacuum Solar Collector

Application: Water Heater

Pipe Material: Copper

Additional Info

Productivity: 2 million square meters of col

Brand: Linuo Paradigma

Transportation: Ocean,Land

Place of Origin: China

Certificate: Solar Keymark, CE,ISO9001,ISO14001,OHSAS18001

HS Code: 84191910

Port: Qingdao

Product Description

U-shape evacuted tube solar collector without CPC reflector, especially appropriate for areas with strong wind load or heavy snows. Mainly used for commercial hot water heating, industrial process heating and space heating in cold areas. 

High efficiency compared with normal evacuated tube U-shape collectors, higher working temperature range and energy yield output. 

Pre-assembled solar collectors, easy for installation and maintainence.

High efficiency up to 74.5%, based on aperture area.


Series U 1521
Number of evacuated tubes
η0 in relation to aperture, EN 12975 % 74.5
a1 with wind, in relation to aperture area W/(m2k) 2.007
a2 with wind, in relation to aperture area W/(m2k2) 0.005
Yield Forecast (location Würzburg, Germany, reference area 3 m2) kWh/m2a 780
Yield Forecast (location Würzburg, Germany, reference area 5 m2) kWh/m2a 619
Collector dimensions (L x H x D) mm 1447 x 1640 x 110
Gross surface area m2 2.37
Aperture area m2 1.98
Collector contents l 2.5
Weight kg 51
Max. working overpressure bar 10
Max. stagnation temperature °C 220
Connection fitting diameter φ (mm) 15
Sensor sleeve φ (mm) 6
Collector material
Al / Cu / glass / silicone / PBT / EPDM / TE 
Glass tube material
Borosilicate glass 3.3
Selective absorber coating material
Glass tube (Ø ext./ int./wall thickn./tube lgth.)
Colour (aluminium frame profile, anodised)
Aluminum grey
Colour (plastic parts)
Thermal shock test / ITW test number
DIN CERTCO registration number

Installation type:
- Pitched roof, flat roof, horizontal
Advantages and benefits
- Specially developed for applications that require horizontally mounting.
- Short installation times due to complete pre-assembled collectors.
- Simple and reliable connection technology in order to extend several collectors side by side through pre-assembled screw connections. Further tubing and an extensive thermal insulation is not necessary
- Integrated return pipe and highly efficient thermal insulation.
- Manageable module sizes for a very high performance and a quick and easy installation.
- Flow and return pipes may be fitted on the left or the right side of the manifold.
- High flexibility due to the different widths and lengths of the collectors.
- Quick and easy exchange of the evacuated tubes without using any tools.
Performance characteristics
- Low pressure loss allows several modules to be connected in series
- Minimum of soldering points ensures a high leakage safety
- Well-known indestructibility of Ritter Solar tubes confirmed by the hailstone test DIN EN 12975-2
- High energy yield in the transitional period and winter
- In wintery conditions with a 400 W/m² irradiation and 0 °C air temperature at a temperature of 20 °C, Ritter Solar evacuated tube collectors already have a higher energy yield than flat collectors.
- Extremely low heat loss due to the high vacuum.
- Outstanding design.

Thermal Collector U Type Solar System


Contact Person: Guo



Address: No. 30766 East Jingshi Road,Jinan,Shandong

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