R1234yf Thermodynamic properties

Saturation tables by temperature and by pressure, superheated vapor table, p–h and T–s diagrams and constants of R1234yf (C₃F₄H₂), computed with CoolProp. Any other state of R1234yf, from any two properties, in the State Explorer or the Worksheet.

Calculate a state of R1234yf Open it in the Worksheet

Constants

Formula: C₃F₄H₂
Also known as: R1234YF
CAS: 754-12-1
Molar mass: 114.04 g/mol
Normal boiling point (1 atm): -29.458 °C (243.69 K)
Critical temperature: 94.7 °C (367.85 K)
Critical pressure: 3.3844 MPa
Critical density: 476.69 kg/m³
Triple point: -151.55 °C, 0.0004127 kPa
Acentric factor: 0.276
Valid up to: 136.85 °C, 100 MPa

Saturation table

By temperature: saturated liquid (f) and saturated vapor (g).

Saturated R1234yf, by temperature
T °C	Psat kPa	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
-140	0.0043421	0.00064619	2235.7	37.735	236.89	274.63	0.1767	1.9559
-120	0.097697	0.00066823	114.26	59.612	225.64	285.26	0.32978	1.8031
-100	0.95931	0.00069141	13.141	81.574	215.43	297	0.46454	1.7087
-80	5.4338	0.00071627	2.5776	103.84	205.81	309.65	0.58621	1.6517
-60	21.048	0.00074347	0.72738	126.64	196.28	322.92	0.69842	1.6193
-40	62.198	0.00077391	0.26445	150.15	186.37	336.52	0.8037	1.603
-20	150.86	0.00080888	0.11497	174.55	175.59	350.14	0.90379	1.5974
0	315.88	0.00085025	0.056708	200	163.48	363.48	1	1.5985
20	591.84	0.00090117	0.030516	226.71	149.42	376.14	1.0935	1.6032
40	1018.5	0.00096753	0.017339	255.05	132.44	387.48	1.1857	1.6086
60	1641.8	0.0010632	0.010045	285.73	110.62	396.35	1.2786	1.6107
80	2519.5	0.001236	0.0055582	320.8	78.63	399.43	1.3779	1.6005

Saturation table by pressure

By pressure: saturated liquid (f) and saturated vapor (g).

Saturated R1234yf, by pressure
P kPa	Tsat °C	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
1	-99.578	0.00069192	12.636	82.04	215.22	297.26	0.46723	1.7072
2	-92.154	0.00070093	6.5815	90.26	211.61	301.87	0.5136	1.6828
3	-87.449	0.00070678	4.4976	95.499	209.35	304.85	0.54216	1.6695
5	-81.086	0.00071487	2.7864	102.62	206.32	308.95	0.57987	1.6541
10	-71.567	0.0007274	1.4571	113.38	201.81	315.19	0.63451	1.6356
20	-60.844	0.00074226	0.76288	125.66	196.69	322.35	0.69384	1.6203
30	-53.915	0.00075234	0.52257	133.71	193.33	327.04	0.7311	1.6129
50	-44.38	0.00076691	0.32434	144.93	188.6	333.53	0.78114	1.6055
100	-29.757	0.00079115	0.16942	162.53	180.98	343.51	0.85552	1.5991
200	-12.77	0.00082296	0.087958	183.62	171.4	355.02	0.93895	1.5972
300	-1.511	0.00084685	0.059611	198.04	164.46	362.49	0.99284	1.5983
500	14.322	0.00088548	0.036136	218.98	153.66	372.64	1.0672	1.6017
1000	39.28	0.00096476	0.017685	253.99	133.12	387.11	1.1823	1.6084
2000	68.974	0.0011249	0.0078024	300.68	98.171	398.85	1.3217	1.6087
3000	88.664	0.001396	0.0039778	339.57	55.812	395.38	1.4286	1.5828

Diagrams

p–h diagram of R1234yf, with isotherms

T–s diagram of R1234yf, with isobars

Superheated vapor table

At each pressure, from its saturated vapor (Sat.) to higher temperatures.

Superheated R1234yf at 20 kPa (Tsat -60.844 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.76288	307.09	322.35	1.6203
-40	0.84127	321.04	337.86	1.6899
-20	0.91583	335.26	353.58	1.7546
0	0.98995	350.29	370.09	1.8174
20	1.0638	366.11	387.39	1.8785
40	1.1374	382.69	405.44	1.938
60	1.2109	400.01	424.23	1.9962
80	1.2843	418.05	443.74	2.053
100	1.3576	436.78	463.93	2.1086
120	1.4308	456.16	484.78	2.163

Superheated R1234yf at 50 kPa (Tsat -44.38 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.32434	317.31	333.53	1.6055
-40	0.33118	320.35	336.91	1.6202
-20	0.36205	334.72	352.83	1.6857
0	0.39247	349.86	369.48	1.749
20	0.42257	365.75	386.88	1.8104
40	0.45247	382.39	405.01	1.8702
60	0.48221	399.76	423.87	1.9286
80	0.51185	417.83	443.42	1.9856
100	0.54141	436.58	463.65	2.0413
120	0.5709	455.98	484.53	2.0958

Superheated R1234yf at 100 kPa (Tsat -29.757 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.16942	326.57	343.51	1.5991
-20	0.17735	333.79	351.53	1.6314
0	0.19324	349.12	368.44	1.6957
20	0.20879	365.14	386.02	1.7578
40	0.22413	381.88	404.29	1.8181
60	0.2393	399.32	423.25	1.8767
80	0.25436	417.44	442.88	1.934
100	0.26934	436.24	463.17	1.9898
120	0.28426	455.68	484.1	2.0445

Superheated R1234yf at 200 kPa (Tsat -12.77 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.087958	337.42	355.02	1.5972
0	0.093482	347.55	366.24	1.6393
20	0.10182	363.88	384.24	1.7029
40	0.1099	380.83	402.81	1.7641
60	0.11781	398.42	421.99	1.8235
80	0.1256	416.67	441.79	1.8812
100	0.1333	435.56	462.22	1.9375
120	0.14093	455.07	483.25	1.9924

Superheated R1234yf at 500 kPa (Tsat 14.322 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.036136	354.58	372.64	1.6017
20	0.037304	359.59	378.24	1.621
40	0.041181	377.38	397.97	1.6861
60	0.044806	395.56	417.96	1.7479
80	0.048272	414.22	438.36	1.8074
100	0.051629	433.42	459.24	1.8649
120	0.054907	453.18	480.63	1.9207

Superheated R1234yf at 1 MPa (Tsat 39.28 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.017685	369.42	387.11	1.6084
60	0.020215	389.98	410.2	1.68
80	0.022351	409.67	432.02	1.7436
100	0.024319	429.57	453.88	1.8038
120	0.026181	449.82	476.01	1.8616

Superheated R1234yf at 2 MPa (Tsat 68.974 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.0078024	383.24	398.85	1.6087
80	0.0089129	397.25	415.07	1.6554
100	0.010438	420.15	441.03	1.7269
120	0.011698	442.13	465.52	1.7908

Enthalpy and entropy are measured from R1234yf's own reference state (CoolProp's default). The textbooks' refrigerant tables use ASHRAE's: in the Worksheet, write reference ASHRAE.