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Wimex VK-180 Panels (scroll down for system output graphs)

Panels have been upgraded with a more powerful heatpipe! (25% more output per panel). For more detailed simulation results and month by month outputs see below.

  • High output 58mm vacuum tubes
  • Available in 20, 30 tube manifolds
  • Click-down tube holders
  • Roof mounting kits and bolts available
  • Life expectancy more than 20 years
  • Frame can adjust to match rafters
  • Corrosion resistant
  • High grade 316 stainless manifold & frame
  • Low maintenance
  • Easy to install
  • SEI registered SEI-ST-235

VK-180-20 Panel

VK-180-30 Panel


Width - 1760mm
Height - 2000mm
Frame Material - 316 Stainless / Aluminium
Insulation - Rockwool
Connection - 22mm copper
Aperture area - 1.86 m²
Absorber area - 1.61 m²
Weight - 72 kg
Volume in Manifold - 1.2 litre
Tube Number - 20
Tube Lenght - 1800mm
Tube Material - Borosilcat-glass
Tube diameter - 58mm
Working Angle - 25° to 65°


Width - 2560mm
Height - 2000mm
Frame Material - 316 Stainless / Aluminium
Insulation - Rockwool
Connection - 22mm copper
Aperture area - 2.78 m²
Absorber area - 2.42 m²
Weight - 110 kg
Volume in Manifold - 1.9 litre
Tube Number - 30
Tube Lenght - 1800mm
Tube Material - Borosilcat-glass
Tube diameter - 58mm
Working Angle - 25° to 65°

Wimex Solar Panels

The manifolds can be adjusted in relation to the frame, even after the panel has been attached to the roof. This makes its very straight forward to join two panels together.

Manifold Close-up

 

Bracket

The panel frame can be adjusted to line up with the rafter underneath.

Outputs

A 30° roof angle is very common in the UK and Ireland and was chosen to give the most relevant results.

Likewise to compare like with like, the daily consumption was fixed at 250 litres of 45°C water per day. Changing the water consumption both in volume and profile can lead to large changes in system output which overwhelm other system parameters.












Package Efficiencies

 
The following graphs summarize the outputs of 33 different annual simulation runs, on varying roof pitches and orientations.

One of the interesting results of graphs is the Western bias. This is caused by 2 factors,

  • True South (i.e. Solar South) is 6° to the West of Magnetic South
  • There are many days when morning cloud and haze are "burned" off by 10 or 11 O'Clock, so when averaged over the whole year, afternoon solar output is a little higher than the morning output.

Simulator Inputs

  • 2 x Wimex 30 tube panels (5.6 sq meters)
  • DHW Tank - 300L - TSOL Default
  • Daily hot water usage - 210 Litres at 43°C
  • Incoming water temperature - 8°C February, 12° August
  • 16 meters of 15mm internal pipework, insulation 15mm Wall 0.045W/mK
  • 1 meter of 15mm external pipework, insulation 15mm Wall 0.045W/mK
  • Results in kWh
 Roof Pitch West  75°  60°  40°  20°  Due South  -20°  -40°  -60° - 75°   Due East
 30°  2061  2176  2275  2374  2432  2451  2423  2347  2231  2120  1996
 60°  1960  2107  2239  2381  2468  2497  2457  2346  2180  2032  1882
 75°  1816  1974  2128  2300  2406  2431  2382  2250  2049  1888  1716

Simulator outputs Month by Month

Winter output is significantly higher on steeper roof angles, and only marginally lower in the winter.

Despite the massive differences between summer and winter energy levels, a significant correction can be made by the angling of the panel so that equivalent winter shadow lengths are as long as possible. The solar panel is then receiving all the energy in the shadow area.

The graphs below show the expected monthly outputs of a Wimex 60 tube system.

Outputs with different cylinder sizes

A 30° roof angle is very common in the UK and Ireland and was chosen to give the most relevant results.

Likewise to compare like with like, the daily consumption was fixed at 250 litres of 45°C water per day. Changing the water consumption both in volume and profile can lead to large changes in system output which overwhelm other system parameters.