The practical use of low temperature solar thermal systems in buildings consists in using the solar radiation for heating a fluid, usually at temperatures up to 90ºC.
This facility is carried out with the help of the so-called solar collectors, which make the most of, firstly, the heat absorption and transfer properties of some materials and, secondly, the greenhouse effect produced by some transparent materials (usually glass), which transmit the shortwave radiation received from the Sun but are opaque to the long wave (infrared) radiation emitted or reflected by the terrestrial hot bodies.
The use of solar energy for some thermal facilities of buildings lets us to decrease the consumption of fossil fuels or electricity, as well as is free of the subsequent greenhouse gas emissions.
Please, take a look at the following video: Low temperature solar thermal system for domestic hot water
The solar system described here is a low temperature solar thermal system, which uses a fluid heated up to 90ºC, using flat plate solar collectors.
Further reading on solar hot water.
Self-assessment
Once you have watched the full video, maybe you are interested in checking if the main concepts are clear. Here you have a self-assessment questionnaire.
Are you interested in reading more carefully the concepts developed in the video? Please, open the corresponding e-book.
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