Water pump Ismail al-Jazari
Pump draws water from the bloodstream of a stream or river to the elevated places – for example, reservoir, or irrigation channel. It uses the kinetic energy of the flowing water, so their work doesn't need
Solar stone bed
Solar stone bed is the way of storing the energy of the Sun into the stone under the slogan: "What I store during the day will keep me warm in the evening."
Trombe wall
Popular, timeless, simple and fairly inexpensive. It might sound a brief characteristic of the passive tempering rooms the energy of the Sun using a trombe wall.
Sand energy storage
Sand is a suitable material for energy storage? When, after a sunny day we'll come to the beach at night and get our hands in the sand, will be tepid. In our country must do a children's sandbox
Compost water heater
All lies! Why we neohřáli a little bit of water. Every experienced gardeners has in the garden compost, where it stores the plant surplus from the garden. In addition to the quality of humus, however we can from the compost pile to get