Geothermal Energy

Science – Society – Technology

Table 1 Properties of working fluids

From: Performance analysis and working fluid selection for geothermal energy-powered organic Rankine-vapor compression air conditioning

Substance	Molecular mass	T _crit	ODP	GWP
Substance	(g/mol)	(°C)	ODP	(100 years)
R290	44.10	96.68	0	3
R600	58.13	151.98	0	20
R600a	58.13	134.67	0	20
R123	152.93	183.68	0.012	76
R245fa	134	154.05	0	820
R134a	102.03	101.1	0	1,320

ODP ozone depletion potential, relative to R11, GWP global warming potential, relative to CO₂.

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