Abstract
Concentrated salt solutions or brines, which are available as natural resources or industrial vastes around the world, represent a vast storage of conserved energy sources and can be used, at least conceptually, to produce power. Of particular relevance there is Isshiki’s [1] power cycle, which utilizes concentration difference energy (CDE) between concentrated brine and pure water (Figure 1). Thermal effects of dilution and boiling point elevation (BPE), ΔT, are limiting factors in this cycle. The BPE in Isshiki’s CDE cycle is used to operate a heat engine, utilizing indirect heat transfer between the heat source at TH = T+ΔT, the engine working fluid and the heat sink at TL = T.
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