# Self-optimized efficient operation of trans-critical CO2 ejector-expansion heat pump water heater system with two-stage evaporation

> Research article (Energy and Buildings, 2023) · cited 11× · AI/ML

**Wikidata**: [openalex:W4387849518](https://www.wikidata.org/wiki/openalex:W4387849518)  
**Source**: https://4ort.xyz/entity/self-optimized-efficient-operation-of-trans-critical-co2-ejector-expansion-heat-pump-water-heater-system-with-two-stage-