Efficient low temperature thermal energy storage

This invention describes a system for generating electricity by storing thermal energy. It works by using a heat pump, which could be solar-powered, to create both a hot and a cold storage fluid. When power is needed, an engine that uses a special organic fluid runs on the temperature difference between these two fluids, producing electricity. The claims specifically detail the method of cooling one fluid, transferring that heat to another fluid, and then using the hotter fluid to evaporate the organic working fluid for the engine.

Why it matters: Filed before significant advancements in organic Rankine cycle engine efficiency, heat pump technology, and low-cost thermal energy storage materials. These improvements make the integrated system more practical and efficient for grid-scale or distributed power generation from intermittent low-temperature sources today.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedOrganic Rankine Cycle engine, heat pump, thermal storage

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