Working principle of U pipe solar collector
The RIDDERS-SOLAR U pipe solar collector consists of 3 main components
  • ALL glass vacuum tube
  • Heat transfer system(solar cycle)
  • Frame
In each vacuum tube there is a U pipe with direct flow-through that is connected to the header pipe inside manifold. This U pipe is seamed in an aluminium heat transfer fin in the interior of vacuum tube that transmits the heat from the interior tube to the U pipe. Solar radiation permeates the outer glass tube and is captured on the outside of inner glass tube by highly selective sputter layer. The captured solar radiation is transmitted to flush-contact aluminium shield and then copper pipe filled with heat transfer fluid. The 360°aluminum heat transfer fin assures the fastest energy transfer.
 
PERFORMANCE
 
RS collector has achieved a comparable high efficiency and with a very small heat loss coefficient. The COST/KWH value is smaller than most other collectors which mean you pay less for each KWH out put for our collector.
(n0=0.880 a1=0.505 a2=0.019) Above data is given to absorber area
 
Efficiency calculation from RIDDERS-SOLAR U-TUBE
 
Optical Efficiency n0 1st order heat loss a1 2nd order heat loss a2 Temp difference Tm-Ta Solar IrradianceG efficiency n
0.696 0.4 0.015 50 800 0.624
ABOVE DATA IS GIVEN TO APERTURE AREA
Tm-Ta: Difference between collector out let and in let temperature. Here we give value of 50 which is the normal temperature you require your collector to rise.
G: The amount of solar energy which hits your collector absorbing element
a1, a2: 1st and 2nd order heat loss of your collector and the smaller value is the better performance your collector has.
Above table gives you a comparison between efficiencies of different collectors when you want your collector to rise your cold water temperature by 50 degree.
QUALITY
RIDDERS-SOLAR collector is EN12975 tested and solar keymark certified. Quality Management System certified to ISO 9001 is applied at our mill. Each RS is individually tested for leakage and other defects. Anodized aluminum case and frame ensures no corrosion will happen to RS collector
Installation is easy even on whatever surface
 
Different systems you can have:
Split systems
Active open loop system (RST-AOL)
An Open Loop System is for climates where there is no risk of freezing.
Recirculation freeze protection can be provided by the Recirculation feature in the controller. An Open LoopWater Heating System provides many advantages. It is the simplest and typically the least expensive active system to install. There is no heat exchanger, which allows efficient heat transfer directly to the water. The system operates at standard line pressure. It is simple to add capacity to the system if demand changes. The system integrates easily with existing systems.
Package includes:
  • Pressure hot water tank (stainless steel inside)
  • Heat pipe vacuum tube solar collector
  • Wilo hot water pump (RS15/6)
  • Three sensors differential controller
  • Stainless steel pressure storage tank
  • Air Scoop &Air Vent
  • Electric Booster: 1.5KW
  • Mag.Anode
  • Vacuum valve
  • P/T valve
  • One way valve
PLEASE SEE APPENDIX TWO FOR DETAILS OF PARTS INCLUDED
Model Collector Tank
RS-AOL SUPERIOR- 150 RS58/16 RSTANK150I(150L)
RS-AOL SUPERIOR- 200 RS58/12*2 RSTANK200I(200L)
RS-AOL SUPERIOR- 300 RS58/16*2 RSTANK300I(300L)
Tank capacity and collector match may be changed on different regions
 
Active closed loop system (RST-ACL)
Closed Loop Solar Heating Systems are suitable for single and multiple solar heating application systems, e.g. domestic solar water heating, solar water heating hot tub, solar swimming pool heating or solar space heating systems. The Closed Loop Solar Systems are suitable for areas with questionable water quality and all climate conditions. The Closed Loop Solar Heating Systems are the preferred option for extremely cold areas.
Package includes
  • Heat pipe vacuum tube solar collector
  • Stainless steel pressure storage tankwith one coil exchanger
  • Solar Master I for system control
  • Air Vent
  • Electric Booster: 1.5KW(fitted in tank)
  • Expansion tank
  • P/T valve(fitted in tank)
  • One way valve
  • Mag. Anode(fitted in tank)
  • Vacuum valve
Model Collector Tank Flow control
RS-ACL SUPERIOR -150 ARS58/16 RST150II(150L) Solar master I+Expansion tank
RS-ACL SUPERIOR -200 ARS58/12*2 RST200II(200L) Solar master I+Expansion tank
RS-ACL SUPERIOR -300 ARS58/16*2 RST300II(300L) Solar master I+Expansion tank
Tank capacity and collector match may be changed on different regions.
NOTE:Absorber area is the part of the collector that actively absorbs the light rays. For solar tubes this is defined as the cross-sectional area of the inner tube (selective coated) measured using the outside diameter.
(Eg. 0.047 x 1.72m = 0.08m2 for a 58/1800 tube)
Aperture area is the part of the collector through which light enters. For evacuated tubes this refers to the cross-sectional surface area of the outer clear glass tube measured using the internal diameter, not the outside diameter.
 
PARTS FOR RIDDERS-SOLAR CLOSED/OPEN LOOP SYSTEM
 
PUMP WILO RS15/6
ELECTRICAL HEATING ELEMENT 1.5KW/220-230V
PRESSURE VALVE 2-3 BAR PRESSURE


VALVE AIR VENT
Magnesium anode PREVENT SCALE BUILD UP
DIFFERENTIAL CONTROLLER FOR SPLIT SYSTEM
CONTROLLER DIFFERENTIAL CONTROLLER FOR SPLIT SYSTEM



ONEWAY VALVE
HIGH PRESSURE STORAGE TANK 150L,200L,300L TANK DOUBLE or SINGLE COIL Stainless steel inside.


P/T VALVE 6 BAR/99 Celsius
Flow control Solar work station Solar Master I




EXPANSION TANK FOR CLOSE LOOP
Next to the U-TUBE system that is the best system for use in Belgium and countries with not a very high sunshine rate, we offer also the following systems:
Open loop systems based on flat panel system, U-tube system or Heat pipe system. Those systems have an integrated boiler.
Schematic layout from a closed loop system. As also the evolution with those systems is quite fast, we advise you to contact us for the latest technologies. We do the calculations for you to see what system will be the best for your use.
Here an example from a Solar Collector placed on a flat roof, connected to a double coil storage tank of 350 Liters. This U-Tueb collector from RIDDERS-SOLAR is using vacuum tubes with the highest purity what is available now regarding the glass that is used for the vacuum tubes.
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