# Flow visualization and noise measurement of R410A two-phase flow near electric expansion valve for heating cycle of multi-split air-source heat pump

> Research article (Applied Thermal Engineering, 2019) · cited 35× · AI/ML

**Wikidata**: [openalex:W2944008856](https://www.wikidata.org/wiki/openalex:W2944008856)  
**Source**: https://4ort.xyz/entity/flow-visualization-and-noise-measurement-of-r410a-two-phase-flow-near-electric-expansion-valve-for-heating-cycle-of-mult