# Research on the adaptive proportional-integral control method of a direct-expansion photovoltaic-thermal heat pump system

> Research article (Energy, 2023) · cited 20× · AI/ML

**Wikidata**: [openalex:W4380372926](https://www.wikidata.org/wiki/openalex:W4380372926)  
**Source**: https://4ort.xyz/entity/research-on-the-adaptive-proportional-integral-control-method-of-a-direct-expansion-photovoltaic-thermal-heat-pump-syste