# A transient coupled model of a variable speed transcritical CO2 direct expansion ground source heat pump for space heating and cooling

> Research article (Renewable Energy, 2019) · cited 29× · AI/ML

**Wikidata**: [openalex:W2923057701](https://www.wikidata.org/wiki/openalex:W2923057701)  
**Source**: https://4ort.xyz/entity/a-transient-coupled-model-of-a-variable-speed-transcritical-co2-direct-expansion-ground-source-heat-pump-for-space-heati