 Hello, welcome to the back garden. My name's Imogen and one of the play workers. We teamed up with opensourcelotech.org and over the past two months we have designed and built a site-specific solar hot water system. So this is the hot water panel, 20 times cheaper than a proper system. It'll do ballpark about the same order of hot water. The hottest I've had any part of this um which is in Guatemala at altitude during winter was 80 degrees. You can make it yourself in less than a day just with nuts and bolts and it's plastic and that's it. So we've got the steel pole cut to length with drilled holes in each end just like 12 mil like half the width in and then we're just sort of like top and tailing it so that the long lengths overlap each other so like at the corner we're going to drill a hole straight through, bolt it straight through, just go around through that through the four corners and then put the uh the other lengths in between and drill with the drill until it's all looked down. Sorry with the crossing what are you doing? So you can see all of this way. Gotcha. Hey Roshi! And then that's basically the panel itself done minus the spray paint and the plastic. The panel is just made of two sheets of galvanized steel which are bolted together just with this like lattice of nuts and bolts through the middle here and then the edges have a bit of weather stripping in between as the gasket and then just like this 20 mil steel tube on either side of the gal. So the water goes in between just balloons those two sheets of gal out very slightly and that creates like a lattice of space for the water to come through and it gets hotter as it goes and it rises as it goes and then it comes out through the back here. Day two we are building a box for the tank which holds the water. The bottom of the barrel needs to be above the top of the panel for the work what the circulate itself as it as it heats. So we just need a box to sort of keep everything contained and locked to the roof of the shipping container so that it doesn't all blow away or fall over and kill some children which I've been advised not to do. So basically it's pretty simple we're just done screwing some bits of wood together. Got the box for the barrel in place that's screwed down but since it's a tall thing in Scotland it's definitely going to blow over we therefore have these bits of wood here which we're now going to attach ropes from each of these four corners up to here. These members here are bolted down through the lip of the container so it's all stapled on the base. This is the panel which we're now going to firmly attach here on about a 60 degree angle so it's sort of aimed for like the low winter sun more than the high summer sun that will get both and that's going to be just planted in front here. We're also how are people are going to put then put two rows of solar photovoltaic panels here for electricity. Hi I'm Gordon I'm up and install a solar PV system in the garden today and we need the solar PV system so that we can have lights and power across the side so that the kids can play and people can see what they're doing because up here in Glasgow it gets pretty dark in the winter and the night's so long. Hey Daniel what we're doing? Today we're going to be plumbing the panel to the tank and the mains to the tank. We're going to spray paint the front of the panel black. We're going to cover it with clear plastic and then the system is done. So basically we just plumbed in the heat exchanger here so I've just got basic compression fittings going through the wall and then using that to clamp onto the wall. So the water is going to come from the tap through this hose this will be up there into the copper go around the copper come out of the copper this is going to be full of hot water especially at the top of the tank because the hot water will rise up. That's the inlet the hot inlet from the panel that's the cooler outlet to the panel so the cooler water comes out here goes for the panel gets hot comes into here. The important thing for these pipes is that for reasons of the convection loop you don't want any sort of like any of that you want it to be uphill like you want it to be like a steady if that had some like high and low points then the heat would get trapped in a high point basically and also air could get trapped there as well and if an air bubble trap gets trapped there it will break the whole connection basically. So this is the insulation on the back you can use anything here you can use more of this polyethylene foam wraps you could use like polystyrene or something significant but I find just like there's just two layers of like thin cardboard that we just keep lying around. So the air temperature is eight degrees and the water temperature is 17.5 but this is with this level of sunshine which is pretty much none like this is a Scottish November day it's not had any sun for a couple of days this would probably represent about a worst case scenario. Like on a sunny day here the other day it was about 35 degrees the water which means that the kids who come to our sessions will be able to wash their hands before during and after sessions and help them to us to adapt to COVID-19 and the challenges that it's bringing to this community. So the way that this is used is we have this little tap down here which is like this mains cold water that has a hose which comes down is buried comes under the ground and up to here runs along here and then goes up into the tank and then in the tank is a coil of copper tube which this just connects the hose connects on to and then it comes out the other side and it goes down to the sink. The copper tube is sitting in the hottest water at the top of the cylinder and so it gets hot because copper is a conductor so it basically sucks the heat some of the heat out of that hot water the cold water becomes hot then goes down to the sink and then that's your hot tap. We've got a thermostatic valve at the sink which basically mixes that hot water coming from here and the cold water coming from the hose together and though you set the temperature that you want and then it like mixes different amounts of hot and cold temperature water depending on their temperature and so people can wash their hands for you know which is obviously important at the moment for health reasons and um sanitary my sanitary