Two-stage cycles
Absorption chillers and heat pumps- Ammonia-water systems.Theory

There are many different architectures for 2-stage cycles.

An architecture comparable to that used for the double-acting cycle consists in using twice the heat of desorption and this in order to increase the COP, as described in the article [BE 9 735] for the H ₂ O-LiBr couple. However, its implementation with the NH ₃ -H ₂ O couple leads to pressure levels too high for commercial application.

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