5. Some facts in regard
to the protection of the environment and the economic efficiency of solar energy
The possibility to save energy using new solar technology and also the possibility to contribute to a reduction of the CO2 emission represent important supporting arguments in every customer advisory conversation. To have basic knowledge in these areas can furthermore be considered as an important prerequisite in order to be able to plan devices and systems that correspond to the needs of the customers. For these reasons, economic efficiency as well as environmental protection considerations and comparisons should form an integral part of the continuing training programme.
Each citizen in Germany e.g., is polluting the environment with an annual CO2 emission of 1,5 tons through his energy consumption. In an average household in Germany about 75% of the energy consumed is used for room heating, another 13% is used for the heating of water. Diagram 5 shows the division of the energy utilisation in detail.
Diagram 5: Energy utilisation in an average household in Germany
English translation of
technical terms and sentences in diagram 5:
|Backen||=||Cooking and baking|
With a modern solar energy installation up to 65% of the energy needed for the heating of water in an average household in Germany and up to 80% of the energy needed for the heating of water in an average household in Southern Europe can be produced. The remaining demand has to be covered by an additional heating system. Diagram 6 shows this relation.
Diagram 6: Attainable solar energy share in regard to the heating of water in an average household in Germany
|Nachheizung||=||Additional heating system|
|Solaranteil||=||Solar energy share|