The CTT employs proven components in a novel system design to provide an energy storage technology using cryogen as the working fluid.
The system harnesses (i) the energy value of phase change (liquid to gas) and (ii) the waste cold to improve the round-trip/end to end efficiency.
It is low cost; efficient; durable, and easily maintainable. It has no geographic or geological constraints. Smaller systems are mobile.
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•Cryogen (liquefied air or gas) can be produced cheaply using off-peak electricity.
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•Cryogen can be pressurised and re-expanded to gaseous form to create a stream of high pressure process gas sufficient to drive a turbine or an expansion engine (the two principal means of electricity generation).
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•Similar techniques were explored in the 1970s but energy cycle efficiency was too low for the technology to be commercially viable.
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•Highview’s technology achieves a quantum leap in efficiency, offering the prospect of commercially valuable storage.
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•There is no further inventive step required to prove or commercialise Highview’s system.
Technology
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•The components for Highview’s systems are all known, reliable and readily available from a range of suppliers.
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•The integration of either cooling or waste heat has limited incremental cost impact (integration, additional pipework, heat exchangers).
