Oskars history

All about Oscar has started with a long conversation about air collectors with our friends in sweden. Here, we obtained the following link:

Air collector with beer cans

The basic principle – originated in the hippie scene in California – has, after peripheral research on the internet, now significantly extended, and technically development today is highly updated.

A first overview offers the lecture series “Solar heat – Solar air systems” at the HTWK, which exists as a document here.

The current state of application types, the technical possibilities and the potential is discussed.

Lecture series air collectors - german
Download studie_warmluftkollektoren.pdf - 6 MB

The magazine “Moderne Haustechnik” has bothered in June 2012 with the theme – air collectors are moving into housing.

Here you find the relevant aspects of promoting an air solar heating in germany.

air collectors are moving into housing.
Download moderne_gebaeudetechnik_6_2012.pdf - 142 kB

The journal “Sonne Wind und Wärme” had already described in October 2010, the potential of the technology, and compiled a world map of producers.

This contribution also comes to the conclusion that the solar air collectors is attributed to a much higher potential in the future.

Upward hot air
Download aufwaertstrend_heisse_luft.pdf - 1 MB

So we have decided to act – and designed Oskar!

In addition there were the following requirements:

  1. Simple and easy installation – we have chosen a sleek aluminum profile with vertical stiffeners, sealed insertable insulation, shaped heat exchange elements from aluminum, toughened glass to cover with silicone seal into the aluminum angle profiles, a slight rear wall in the form of a Alucom composite panel and stainless steel screws for the other components. The pre-assembly or assembly should both be possible in cooperation with a workshop for the disabled, on the other hand can also been carried out by technically not talented people.
  2. Waiver of any technique in the collector itself – fan, solar panel or control technology can go wrong, and should be accommodated achievable and interchangeable outside of the actual collector, protected in the building, as far as possible. Thus Oskar has no component that on utilization over time can break, and makes disassembly required.
  3. High heat exchange capacity – air is initially a bad medium for absorbing heat, our goal was, to accommodate as much swap space as possible to the collectors small body, which we have certainly succeeded with 21 specially formed heat exchange elements from aluminum with almost 8 m ² surface. A separate supply / exhaust system guarantees the uniform ventilation of the entire collector.
  4. Use of a modern absorber sheet – rather than in thermal collectors often usual coated trapezoidal sheets or solar paint absorber surfaces now we used – to increase the efficiency – a selective absorber plate – Bayer developed – sold from Alanod under the brand name microtherm ® .
  5. Modular concept – the collector should be coupled, in series, to be operated with solar panel or power, his fan sizes depending on the application, freely determined and selected to take no effect on the actual collector. Oskar can be fitted with independent ventilation solutions, and is only what he was made for – a high quality, made out of indestructible materials heat producer. Finished tailored modules to Oskar form the accessories.

Those who wish to learn a little more about the reflection spectrum of the absorber sheet, will find more information here:

Alanod microtherm


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