4 ms·
Here you go: E = mgh 1000l tank = 1000kg 7m high roof (~2 stories) E = 1000kg * 9.81ms^-2 * 7m =~ 70 000j 1Wh = 3600j So a 1000l tank on your two story h
by MrsPeaches 10y ago
Here you go:
E = mgh
1000l tank = 1000kg
7m high roof (~2 stories)
E = 1000kg * 9.81ms^-2 * 7m
=~ 70 000j
1Wh = 3600j
So a 1000l tank on your two story high roof would be able to store ~19Wh
Not including mechanical losses
For comparison a single decent sized SLA battery will be able to store 1000 Wh
- hyperpallium 10y agoThanks! Not as good aa I'd hoped...
- LeifCarrotson 10y agoThe numbers work better with increasing size, because volume is the cube of the dimensions. Also, you can build a pond on a hill with some excavators much more efficiently per unit volume than an enclosed plastic container. A 1m cube weighs 1,000kg and has about 20Wh. A 10m cube weighs 1,000,000 kg and has about 20,000 Wh. A 50m deep, 1 km square reservoir has 1,000,000 Wh. And that's still assuming that it's 7m above the turbine!