Title:
|
Development and testing of a low cost solar thermal collector
|
The purpose of this project was to investigate the possibility of developing a solar thermal collector using everyday materials, polymers and rubbers, focusing mostly on low cost and ease of construction with a DIY approach. While a large amount of research exists to find ways to increase the efficiency of solar thermal collectors, there is a lack of research focusing on reducing their cost. Further than that, most solar thermal collectors are designed using a limited pool of materials, mostly aluminium and copper, that have been experiencing increasing costs over the years.
A novel solar thermal collector was conceptualised, constructed and tested in order to measure how viable it would be. The materials used comprised twin wall polycarbonate sheets, acrylic glass (polymethyl metacrylate, PMMA), and Ethylene Propylene Diene Monomer Rubber (EPDM) arranged in an unconventional design rather than using traditional elements of solar thermal collectors such as absorber plates. Further than that, a side‐by‐side comparison with a leading commercial flat plate collector was also made.
The prototype collector exhibited comparable outputs to the commercial collector, sometimes even surpassing it in terms of heat output per m2, while having a significantly lower cost.It should be noted that these characteristics are shown under outdoor Scottish late autumn and early winter conditions, less than ideal when compared with warmer and sunnier climates. As a result of these tests, commonly‐accepted test standards are considered flawed, and test standards should be reviewed to account for these types of conditions.
Examining the data gathered in this project, alternative solar thermal designs using polymer materials warrant further investigation and investment as they have many advantages over conventional designs.
|