Porsche Enthusiasts Club Forum

It's been very imformative and a bit like 'Cook along with Gordon' - in that following all your instructions I have managed to build a turbocharger on my kitchen table. Now, according to you two it will work best near the oven rather than the fridge - or am I missing something? And is the extractor hose off the tumble dryer too long to get the pressure up?

whack some loft insulation round it?

i agree use the insulation to keep the heat

Nice vid Dave

Loft insulation? Is that what they mean by 'turbo lagging'

Groan

What you need to do is place the fridge next to the oven, then you can have the hotside in the oven and the cold side in the fridge for maximum efficiency. The tumble drier hose should be fine so long as you get plenty of that loft insulation wrapped around it, but remember, when the house is in neutral you won't see any boost so you have to get it under load

I hadn't watched the vid as YouTube is blocked at work and I haven't had time at home, but as I'm working from home today...

I know we moved the discussion on after it was made, but it was very amusing, as in the light-hearted style genuinely made me laugh. Well done.

we had some fun with that vid lol.

look in my other vids for the bucket one lmao

Its worth noting that the relationship of temperature and pressure in a gas can be confusing.

I understand it as such and hopefully this will help others to have a better understanding of how they are related.

Molecules in a gas are constantly moving in random directions at random speeds, think of it as a load of balls flying around bashing into each other etc. Now consider increasing the temperature of that gas, the end results are that those molecules are moving at an increased speed.

What is pressure? Its important to understand you cant have pressure unless a you have a container. Pressure then is the effect on the container of all those balls banging against the walls of that container transferring some of their energy to push against the wall. Therefore if you increase temperature those balls are moving faster and hit the walls harder. Again if you add more balls into the container you have more balls banging against the walls.

Another important thing to consider is gas flow. Imagine now that instead of all those gas molecules are moving randomly they band together and charge against a common enemy (albeit still lightly randomly but theres definately a trend) in this case our turbos rotor. This is what the flow of a gas (or liquid is) its just a general trend in those molecules towards moving in one direction.

So you can see now that the ability of a gas/liquid to do work is a function of how many molecules there, how fast they are moving and in what direction.

This is my understanding, I hope it helps others and is in fact correct at least at some level .

Tom

I agree with all of that, Tom. I was discussing this subject over the weekend with a friend who is an engineer (albeit electronic). We ended the conversation with agreement that maybe the need for heat is simpler even than I suggested earlier - in fact it is simply that the effective "pressure" of the exhaust gas (acting in the container between the exhaust port and the turbo impeller) is raised by the increase in temperature just as you describe.

Ha I am also an electronics engineer. Interestingly however gas and liquid flow is often extremely similar to the way electric current (a flow of electrons) behaves.

PV = nRT

don't you need a bag to catch any electrons that leak out ?

Just to catch the smoke & that's just on the Lucas systems!