Performance assessment of a double-lift absorption prototype for low temperature refrigeration driven by low-grade heat

Finally, the prototype performances are experimentally assessed, confirming that the influence of the restrictor between high and intermediate pressure and pointing out that the use of a fixed restrictor prevents the full exploitation of the potential of the cycle. As a consequence, the use of a variable restrictor could represent an option for optimizing the appliance COP in a wide range of thermal lifts.