This dataset provides the research data system test results of R-744 (propane) systems. In the TRI-HP project, a new heat pump system with R-744 was integrated into multiple renewable energy sources. There were two experimental campaigns. After analysing the results of the first experimental campaign, the prototype was further improved. The second experimental campaign was conducted with the improved prototype. The detailed information can be found in ZENODO: Refined heat pump design and results of final testing Critical review of heat pump prototype operation and required modications Performance investigation of an ejector-assisted transcritical CO2 heat pump with brazed plate tri-partite gas cooler for space heating and hot water production Experimental performance evaluation of supercritical CO2 in brazed plate heat exchangers of the tri-partite gas cooler