Efficient use of energy: solar thermal energy for trade and industry

Solar thermal energy, also known as solar heat generation, is a proven technology that uses solar energy to generate heat. This heat can be used for a wide range of applications, from heating buildings to providing process heat in industrial applications. In this article, we look at the functionality, benefits and areas of application of solar thermal energy in the commercial and industrial sector and provide important sources and studies.

How solar thermal energy works

Solar thermal energy uses solar panels to convert solar radiation into heat. These collectors usually consist of absorbers that absorb solar radiation and convert it into heat, which is then stored in a heat transfer medium (usually water or a water-glycol mixture). There are different types of solar panels:

flat plate collectors: These are the most frequently used collectors and consist of a flat, black absorber surface covered by transparent glass. They are inexpensive and easy to install.
vacuum tube collectors: These collectors consist of several parallel glass tubes, each with an absorber. Vacuum insulation minimizes heat loss, making these collectors more efficient, particularly at low outdoor temperatures¹.

Benefits of solar thermal energy

cost savings: By using free solar energy, companies can significantly reduce their energy costs. Especially with rising energy prices, solar thermal energy offers an economically attractive alternative to fossil fuels².
environmental protection: Solar thermal systems generate heat without CO2 emissions and thus contribute to reducing the ecological footprint. They help companies achieve their sustainability goals and make their contribution to climate protection³.
Independence from fossil fuels: Solar thermal energy offers an opportunity to free oneself from dependence on fossil fuels and thus ensure greater supply security in the long term.

Areas of application of solar thermal energy

Building heating and water heating: Solar thermal systems can be used to heat office buildings, production halls and commercial spaces as well as to heat water. Especially in new buildings and energy-renovated buildings, they can cover a large part of the heat requirement.
Process heat in industry: In industrial applications, heat is required for various processes, such as in food and beverage production, in the chemical industry or in textile production. Solar thermal energy can make a significant contribution here and replace fossil fuels⁴.
Combination with other technologies: Solar thermal systems can also be combined with other renewable energy sources such as photovoltaics or heat pumps to create an even more efficient and sustainable energy system¹.

Challenges and solutions

Storage and availability: One of the biggest challenges of solar thermal energy is storing the generated heat so that it can be used even in cloudy weather or at night. Modern storage systems, such as buffer tanks, can remedy this situation and increase supply security¹.
space requirement: Solar thermal systems require a certain area to install the collectors. If space is limited, this may be a limitation. However, careful planning and use of roof space can provide a solution.
investment costs: The initial investment costs for solar thermal systems can be high. In the long term, however, these costs are amortized by savings in energy costs and funding opportunities through government programs².

conclusion

Solar thermal energy offers commercial and industrial customers a sustainable and economically attractive way to meet their heating needs. With the right planning and implementation, solar thermal energy can help cut energy costs, reduce CO2 emissions, and reduce dependence on fossil fuels. Solar thermal energy is a promising option for companies that want to achieve their sustainability goals and at the same time profit economically.