 Hello everyone, my name is Harold, I'm French, I'm a political engineer, and this is my first presentation and actually the first part of my slides are photography. It's okay, I've tried to create something in the trend, so let's see what we can do. So the idea is to concentrate the heat energy from the sunlight and convert it into electricity. This is really what I want to do. But since we have heat, why not do we need some water? So the system is classified as a concentrated solar power or CSP. Okay, this is the general synoptic of the system. So we go through the other slides slowly, but you can see we have the sunlight on the left. It's concentrated by the front-end lens on the surface that we consider as a fluid heater. Then the fluid will be transferred to the heat tank where we start the heat energy just as is. From there we have two options, like I said, we can convert it into electricity, but it's a bit more complicated. Or you use what we call the heat exchanger, which will help you to transfer the heat to a secondary circuit in which you make your water circulate. So here you have some texts about what I just said, so the front-end lens, the fluid heater and the heat tank. Here is about the water prediction, so you see clearly the heat exchanger circuits. And on this one is about the electricity protection. So what's interesting here is that we use what we call the heat engine. Some very practical one is called sterling engine. You have different configurations. This one is supposed to look like an alpha configuration. And which one will convert the heat into mechanical energy? So we change out the torque and we make an alternator spinning to produce electricity. What we call next actually is this slide, sorry. So you will see that we convert the AC electricity into DC. We store it in batteries, we have voltage regulation, current regulation. And of course when you need it at home or for any other appliances, you need to convert it back to AC. So the idea behind this is to have another unit to synchronize the AC signal with the grid if you want to send it back. So this is globally the project I want to develop this year. At the end of my short presentation you have a list of subsystems I have to work on. So we have the Sunmac concentration units. I've been done already, or partly actually, I just tested the Fresnel lens. We have the Sunmac tracking system. Since we need to concentrate the light, we need to have a very, very small spot focusing on a particular area. So we need the active system to track the position of the Sun. Temperature control focal point adjustment system is about how big you want the spot light on your eating elements. So if you don't want to melt the device, you have to adjust the focal distance accordingly. Then you have the high-temperature fluid heater. So this is the device. We can see that the square where all the light is concentrating. We have the high-temperature fluid tank. So the fluid tank actually contains some kind of fluid. But usually we use melted salt because they have a higher heat capacity, a higher boiling point as well. Then we have the heat exchanger, of course, for the hot water production. Thermal electricity, energy converter. So like I said, it would be a steam turbine. This was my first idea, our Stirling engine. Or maybe something inspired from the Stirling engine. I have some ideas in mind, but I'm not really sure it works. So I won't tell more. And of course all the AC to DC, DC to AC converters. And of course some control and monitoring system. That's it for now. Someone has a question? What is the electricity production efficiency compared to the solar system? Okay, I did some research. I lost the pages. When you use, okay, you have different methods. You have the standard photovoltaic solution, which is rated around 20 to 22% maximum. You have what we call the concentrator photovoltaic, which use also a final lens to focus the sunlight to say that. On the same kind of a cell, but they use up to four junctions of a very high quality or high efficiency. And they achieve up to 44% doing that. But you need also a light tracking system. So it's more complex, more expensive. And sometimes what you gain in productivity is lost in the cost of the installation. And about the thermal approach, we can up to up to 60%. This is historically maximum limit, if I'm not wrong. So I will try to get something working around this level, maybe. Any other question? Yes, Fasi? Have you used the thermal approach? No, no, no, no. I'm just starting. Two weeks ago I did the test of the almost one square meter, sorry, Fresnel lens, yes. So the kind of lens you can get from a, sorry. I use it from an old TV, you know the rear projector kind? Yeah. Yeah. So I got one, I say, oh, maybe I restart this project with you. Yes? Yeah. Are you again? Oh, this picture is because you have one side you can eat up. So even if you have some heat generated, I mean accumulated there, it will just go up. On the other side, the whole side, you have also some heat accumulation over time. So in this configuration, you will have, by convection, to evacuate the heat. But this is quite experimental, I mean, for what I want to do. I agree, there exists a project like this since 1980 for one project named Van Guert, who was using this and I found out that it was 12 or 25 kilowatts of solar energy with a dish of maybe 12 meters diameter. But the problem is you cannot produce electricity by night. So it's why I need a heat tank. Yes? So the, I mean, the last, as far as the last is, that's basically the amount of power that you're using. Oh, yes. So what do you think it doesn't bind you compared to just taking a larger heat barrier? Okay, for one square meter, you can hope for one kilowatt of energy, solar energy. So let's say you work with 60% ideally, you can reach 600 watts. Yeah, and what is the length, but you compare to just how you want to do it? You have some area, if you get some sunlight... Oh, yes. We can do that. But the interest is to get higher temperature. Some people manage to melt steel, even glass using Fresnel lens. I'm guessing what you do is you capture from a larger area, but then your water needs to be this small here. So you have to spread out your water into the larger area. So your lens can capture a big area of sunlight and then you put in a smaller area of water and get that heated up. You could do the same thing by spreading the water around in the big area. But then I'm guessing you also have some of a lot more connected out also there. So for one square meter of the Fresnel lens, you're talking about how many more types of fission is in the religion space to the amount of water you can produce compared to... I think we're almost at the same level. One of my friends told me once we installed solar panels on a shelter. And he told me he's expecting 400 or 800 watts for one square meter or roughly. But this is at best. So for me it's not to compete really with the existing solutions. It's just an exploration for my own interest. Let's see if we can really do much better, if we can also reduce the size of the setup. So since you're concentrating on sunlight, is it possible to have a higher efficiency even though the sun may not be as comfortable to level compared to let's say solar style? I think so because we are reaching very, very high temperatures, but we don't need 3000 degrees Celsius for the setup to work actually. So it's just like, yeah. Okay, anyone else? No? Okay, so if there's no one else, let's give Harold a round of applause for his best analysis.