Geothermal Energy. Please correct it This text is supposed to be the transcription of an oral presentation, so I'm sorry if it is a mess and you don't understand it. However, I'd be please if you could correct any mistake. Thanks forehand. Hello, I'll talk to you about Geothermal Energy, also, I'll focus on applications in HVAC and DHW. Geothermal Energy is the thermal energy generated and stored in the Earth. We can see here a classification of the different geothermal sources by temperature and applications for each one. However, we're focusing on very low temperature source, since it is the only one we can find easily in Spain. Geothermal Power Plants are not very important, as there are not more than 10 GB installed. However, it is important in countries like Iceland, El Salvador or the Philippines. There are two different kinds of Geothermal Power Plants. Here we can see that we use the dry steam from the ground directly. When the ground cannot supply dry steam a heat exchanger is required, as it is shown in the picture. When we don't have neither a working fluid nor enough temperature, we have to work with brine and a geothermal heat pump to increase o decrease the temperature. I'll explain briefly the different configurations exist in ground heat exchangers. The ground loops can be open or closed. The most common used in Spain is the closed one, since it is not easy to find underground water. Furthermore, if we compared vertical and horizontal loops, we'd find that even vertical one is much more expensive, it is commonly used, as horizontal one has significant handicaps. You might be wondering if a geothermal heat pump can be used in any kind of building. Let me say that it is. I have differents examples to show you that. A bank's new headquarters, a block of flats and a detached house. The three projects in Madrid, by the way.