Hi there in this video I will tell you about what you can do in your household and buildings to Improve your current energy demand and what you need to do to take care that your greenhouse gas Emissions are effectively reduced and eventually become zero as a first trip to structure your efforts What you can do is to reduce your demand. So in this case reducing the amount of kilowatt hours you use The second step is the cascading of resources. So the you reuse of waste streams So for one process you forward it to another and you sit there as an input But then with lower quality demand the first thing you can do is multi-sourcing This means that you use renewable and sustainable energy sources to cover your energy demands So to fill these somewhat abstract terms, I will show you some examples for each of these steps starting with the modernization this means That you do something what we normally call passive solutions So you install or design something that reduces your energy demand all the time? one common example for this reduction is Insulation if you improve the insulation you directly decrease the heat losses that you have to the outside and by that your heating amount so what I could do as a person I Could wear Another layer and by that efficient efficiently would use my heat amount If you now want to improve your cooling and reduce your body temperature, I could think of better ventilation so I take care that my body temp is just regulated or if I’m cold and I want to make best use of The sunlight what I can do is I can turn towards the Sun where it’s warmer Now how does this now translate to a building what you can do for instance for a building you could install Another additional insulation layer, that’s normally something done for existing buildings. All you use really real insulating building materials if you buy the new one Cooling and ventilation you can use mechanical on fo ventilation, but that you keep the inside temperature low with minimal efforts To make good use of the Sun and its heat and light you can orientate Larger surface of your building towards the Sun so in the northern hemisphere to the south follower you would increase the glass surface to that side to let heat and Light in while you reduce them on the north side, so you would use their heat losses If you want to efficiently reduce electricity demand the simplest way to get rid of is to get rid of your old-fashioned Appliances and go for new less energy consuming ones. So for instance you can use More effective lightbulbs then in the past. So with these LED lights and other light sources, you could use only a fraction of your previous Energy demand while providing the same amount of light in the room The second step what you can do is to cascade or we use energy Misses most often limited to the reuse of heat and cold but then at different temperatures than the original process One example that does show this idea. Somewhat is the following if you want to boil your eggs for breakfast in the morning You usually have hot water left at the end. And usually you do nothing with it You just follow the way but you never list. You said hot water for something else for example for pulling a nice cup of tea but this is a bit far-fetched and not Essentially flat tasty nevertheless, it shows that we’ve got waste streams in a household that we can use for something else where we can apply the principle of Reusing waste streams. So you’ve got hot water coming from your shower or from your sink You can use them to preheat the incoming cold water from your water supply line before it actually Enter the heating kettle by that the temperature is already increased before entering it and you need less heating energy Furthermore what you can think of it’s using reject heat from cooling such an I swing to or my swing pool Sounds a bit strange reject heat from cooling doesn’t it? But have you ever touched the rear view fridge at home? This is quite hot there and you can use that heat for some so for example heating your food now The modernization and cascading will get you only that far you will eventually end up with a minimized energy demand But you still have to cover that part and this is what? Multi-sourcing enters the game and what you’re sourcing here means like already said before the use of renewable and sustainable energy sources Most of you will have heard about that emerging and sometimes already applied technology in this field so for instance the use of photovoltaic panels which convert sunlight into Electricity you can find them on small-scale applications like this calculator or streetlights You can also think of installing them on your roof So you could provide electricity for your building or if you using a larger scale you can have whole fields of them If you want to increase the scale even further you cannot use PV anymore But you normally would switch to something what is called a solar tower or a solar flow Where you focus the sunlight in one spot but abet you create high temperatures These high temperatures are then used to provide steam and the steam is used in a steam turbine to produce electricity What you also can do is you can use wind turbines This might be a small one and also doesn’t use it doesn’t produce egg tricity But nevertheless wind can play a tremendous role in future in our energy supply Where you would install them? It’s normally at locations. We’ve got a high wind speeds and where these high wind speeds are normally constant So you’ve got a high constant energy output these locations can be either unsure or Offshore and you can use just one of them or you can have whole parks of them There are many researchers technologists and inventors busy with new technologies and ways to provide sustainable energy for everyone so for instance in bargaining researchers work on ways how to use plants to produce electricity in a concept that’s called plant a Well, this might be currently only be one small plant there are plans to use whole fields of this to preview reduce electricity in future And there are many other ideas out there. That might make a breakthrough So are you the one that will bring us a light?