Energozapas gravitational power engineering

Modern global trends in power engineering have increased a demand for energy storage systems

Energozapas Ltd. has been developing a Lifted Weight Storage (LWS), which is comparable to Pumped Hydro Storage (PHS) in terms of economic performance, but does not require natural water sources and landscape elevations.


The operating principle

The LWS’s operating principle is similar to PHS’s one: it consumes electric power to elevate a solid weight up to the height of a few hundred meters, and produces it when the weight goes down under the action of gravity. The only difference is the weight type: while PHS uses water, LWS uses wrapped soil weights.

Appealing idea

Today many companies are trying to build a business on the idea of mechanical energy storages lifting solid weights:

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In energy storage systems based on manipulations with solid weights, the said weights, in fact, are comprise one of the most expensive elements. Weights used in LWS are produced using the soil extracted from the construction pit for the LWS’s basement. The energy storage building has no floor slabs and is made to be a set of vertical columns connected by diagonal and horizontal braces. Four neighboring columns form a shaft for vertical transmission of a solid weight.

A combination of such solutions has made it possible to develop a flatland grid scale energy storage that can be built in places, where constructing a PHS could only be an economically viable alternative, if a landscape elevation or a natural water source was present.