7.3: Appendix C - Thermodynamic Properties of R134a

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Table C1: Saturated R134a

T (^oC)	P (MPa)	Specific Volume m³/kg		Specific Internal Energy kJ/kg		Specific Enthalpy kJ/kg		Specific Entropy kJ/kgK
		v_f	v_g	u_f	u_g	h_f	h_g	s_f	s_g
-70	0.00798	0.000666	2.058960	111.19	338.59	111.20	355.02	0.6262	1.8264
-65	0.01138	0.000672	1.476490	117.26	341.35	117.27	358.16	0.6557	1.8130
-60	0.01591	0.000678	1.079030	123.35	344.15	123.36	361.31	0.6846	1.8010
-55	0.02183	0.000685	0.802362	129.49	346.96	129.50	364.48	0.7131	1.7902
-50	0.02945	0.000691	0.606198	135.65	349.80	135.67	367.65	0.7410	1.7806
-45	0.03912	0.000698	0.464726	141.86	352.65	141.89	370.83	0.7685	1.7720
-40	0.05121	0.000705	0.361076	148.11	355.51	148.14	374.00	0.7956	1.7643
-35	0.06614	0.000713	0.284018	154.40	358.38	154.45	377.17	0.8223	0.8223
-30	0.08438	0.000720	0.225945	160.73	361.25	160.79	380.32	0.8486	1.7515
-25	0.10640	0.000728	0.181623	167.11	364.13	167.19	383.45	0.8746	1.7461
-20	0.13274	0.000736	0.147395	173.54	366.99	173.64	386.55	0.9002	1.7413
-15	0.16394	0.000745	0.120671	180.02	369.85	180.14	389.63	0.9256	1.7371
-10	0.20060	0.000754	0.099590	186.55	372.69	186.70	392.67	0.9506	1.7334
-5	0.24334	0.000763	0.082801	193.13	375.51	193.32	395.66	0.9754	1.7300
0	0.29280	0.000772	0.069309	199.77	378.31	200.00	398.60	1.0000	1.7271
5	0.34966	0.000782	0.058374	206.48	381.08	206.75	401.49	1.0243	1.7245
10	0.41461	0.000793	0.049442	213.25	383.82	213.58	404.32	1.0485	1.7221
15	0.48837	0.000804	0.042090	220.09	386.52	220.48	407.07	1.0724	1.7200
20	0.57171	0.000816	0.035997	227.00	389.17	227.47	409.75	1.0962	1.7180
25	0.66538	0.000829	0.030912	233.99	391.77	234.55	412.33	1.1199	1.7162
30	0.77020	0.000842	0.026642	241.07	394.30	241.72	414.82	1.1435	1.7145
35	0.88698	0.000857	0.023033	248.25	396.76	249.01	417.19	1.1670	1.7128
40	1.01659	0.000872	0.019966	255.52	399.13	256.41	419.43	1.1905	1.7111
45	1.15992	0.000889	0.017344	262.91	401.40	263.94	421.52	1.2139	1.7092
50	1.31791	0.000907	0.015089	270.43	403.55	271.62	423.44	1.2375	1.7073
55	1.49151	0.000927	0.013140	278.09	405.56	279.47	425.15	1.2611	1.7050
60	1.68178	0.000950	0.011444	285.91	407.38	287.51	426.63	1.2848	1.7024
65	1.88982	0.000975	0.009960	293.92	408.99	295.76	427.82	1.3088	1.6994
70	2.11683	0.001004	0.008653	302.16	410.33	304.28	428.65	1.3332	1.6956
75	2.36412	0.001037	0.007491	310.68	411.32	313.13	429.03	1.3580	1.6910
80	2.63320	0.001077	0.006448	319.55	411.83	322.39	428.81	1.3836	1.6850
85	2.92583	0.001127	0.005499	328.93	411.67	332.22	427.76	1.4104	1.6771
90	3.24418	0.001194	0.004613	339.06	410.45	342.93	425.42	1.4390	1.6662
95	3.59123	0.001294	0.003743	350.60	407.23	355.25	420.67	1.4715	1.6493
100	3.97238	0.001536	0.002681	367.20	397.03	373.30	407.68	1.5188	1.6109
101.06	4.05911	0.001954	0.001954	381.71	381.71	389.64	389.64	1.5621	1.5621

Table C2: Superheated R134a

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 50 kPa (Sat. T = -40.45 ^oC)				P = 100 kPa (Sat. T = -26.36 ^oC)
Sat	0.369253	355.25	373.72	1.7650	0.192558	363.34	382.60	1.7475
-20	0.404876	368.97	389.21	1.8288	0.198410	367.81	387.65	1.7677
-10	0.421989	375.89	396.99	1.8590	0.207433	374.89	395.64	1.7986
0	0.438974	382.98	404.93	1.8885	0.216303	382.10	403.73	1.8288
10	0.455859	390.22	413.02	1.9176	0.225060	389.45	411.95	1.8584
20	0.472664	397.64	421.27	1.9463	0.233731	396.94	420.31	1.8874
30	0.489404	405.22	429.69	1.9745	0.242333	404.59	428.82	1.9160
40	0.506090	412.97	438.28	2.0024	0.250878	412.40	437.49	1.9441
50	0.522731	420.89	447.03	2.0299	0.259376	420.37	446.30	1.9718
60	0.539334	428.98	455.94	2.0571	0.267835	428.49	455.28	1.9991
70	0.555904	437.23	465.02	2.0839	0.276260	436.78	464.41	2.0261
80	0.572447	445.64	474.26	2.1105	0.284657	445.23	473.70	2.0528
90	0.588966	454.22	483.67	2.1367	0.293029	453.84	483.14	2.0792
100	0.605464	462.96	493.24	2.1627	0.301380	462.61	492.74	2.1053
110	0.621943	471.87	502.96	2.1884	0.309713	471.53	502.50	2.1311
120	0.638407	480.93	512.85	2.2139	0.318029	480.61	512.42	2.1566
130	0.654857	490.15	522.89	2.2391	0.326331	489.85	522.49	2.1819

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 150 kPa (Sat. T = -17.13 ^oC)				P = 200 kPa (Sat. T = -10.07 ^oC)
Sat	0.131283	368.63	388.32	1.7388	0.099877	372.64	392.62	1.7334
-10	0.135816	373.84	394.21	1.7615	0.099915	372.70	392.68	1.7337
0	0.142013	381.19	402.49	1.7924	0.104811	380.24	401.20	1.7654
10	0.148081	388.64	410.86	1.8225	0.109552	387.82	409.73	1.7961
20	0.154053	396.23	419.33	1.8519	0.114185	395.49	418.33	1.8259
30	0.159950	403.95	427.94	1.8808	0.118737	403.29	427.04	1.8551
40	0.165787	411.82	436.68	1.9092	0.123226	411.22	435.87	1.8838
50	0.171576	419.83	445.57	1.9371	0.127663	419.29	444.83	1.9120
60	0.177323	428.01	454.60	1.9646	0.132057	427.51	453.92	1.9397
70	0.183036	436.33	463.79	1.9918	0.136415	435.88	463.16	1.9670
80	0.188719	444.82	473.12	2.0186	0.140744	444.40	472.54	1.9940
90	0.194377	453.45	482.61	2.0451	0.145046	453.06	482.07	2.0206
100	0.200014	462.25	492.25	2.0713	0.149326	461.88	491.75	2.0468
110	0.205631	471.20	502.04	2.0972	0.153588	470.86	501.57	2.0728
120	0.211233	480.30	511.98	2.1228	0.157832	479.98	511.55	2.0985
130	0.216819	489.56	522.08	2.1481	0.162062	489.26	521.67	2.1240
140	0.222394	498.97	532.33	2.1732	0.166278	498.69	531.95	2.1491

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 300 kPa (Sat. T = 0.67 ^oC)				P = 400 kPa (Sat. T = 8.93 ^oC)
Sat	0.067704	378.68	399.00	1.7267	0.051207	383.24	403.72	1.7226
10	0.070931	386.06	407.34	1.7567	0.051506	384.12	404.72	1.7261
20	0.074254	393.96	416.24	1.7876	0.054214	392.32	414.01	1.7584
30	0.077478	401.93	425.18	1.8175	0.056797	400.50	423.22	1.7893
40	0.080629	410.00	434.19	1.8468	0.059293	408.73	432.45	1.8192
50	0.083723	418.19	443.31	1.8755	0.061724	417.05	441.74	1.8484
60	0.086770	426.50	452.54	1.9036	0.064105	425.47	451.11	1.8770
70	0.089779	434.95	461.89	1.9312	0.066443	434.01	460.58	1.9050
80	0.092755	443.54	471.37	1.9585	0.068748	442.67	470.17	1.9325
90	0.095705	452.27	480.99	1.9853	0.071023	451.47	479.88	1.9597
100	0.098631	461.15	490.74	2.0118	0.073275	460.41	489.72	1.9864
110	0.101537	470.17	500.63	2.0380	0.075505	469.48	499.68	2.0127
120	0.104426	479.34	510.67	2.0638	0.077717	478.69	509.78	2.0387
130	0.107299	488.66	520.85	2.0894	0.079914	488.05	520.02	2.0645
140	0.110160	498.12	531.17	2.1147	0.082097	497.55	530.39	2.0899
150	0.113009	507.74	541.64	2.1397	0.084268	507.20	540.91	2.1150
160	0.115847	517.50	552.25	2.1645	0.086429	516.99	551.56	2.1399

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 500 kPa (Sat. T = 15.73 ^oC)				P = 600 kPa (Sat. T = 21.57 ^oC)
Sat	0.041123	386.91	407.47	1.7197	0.034300	389.99	410.57	1.7175
20	0.042116	390.55	411.61	1.7339	–	–	–	–
30	0.044338	398.99	421.16	1.7659	0.035984	397.37	418.96	1.7455
40	0.046456	407.40	430.63	1.7967	0.037866	406.01	428.73	1.7772
50	0.048500	415.86	440.11	1.8265	0.039659	414.63	438.43	1.8077
60	0.050486	424.40	449.64	1.8555	0.041389	423.30	448.13	1.8373
70	0.052427	433.04	459.25	1.8839	0.043070	432.04	457.88	1.8661
80	0.054332	441.78	468.95	1.9118	0.044711	440.87	467.70	1.8943
90	0.056205	450.65	478.76	1.9392	0.046319	449.82	477.61	1.9220
100	0.058054	459.65	488.68	1.9661	0.047900	458.88	487.62	1.9492
110	0.059880	468.78	498.72	1.9927	0.049459	468.06	497.74	1.9759
120	0.061688	478.04	508.88	2.0189	0.050998	477.37	507.97	2.0023
130	0.063479	487.44	519.18	2.0447	0.052520	486.82	518.33	2.0283
140	0.065257	496.98	529.60	2.0703	0.054027	496.39	528.81	2.0540
150	0.067022	506.66	540.17	2.0955	0.055522	506.11	539.42	2.0794
160	0.068776	516.48	550.86	2.1205	0.057006	515.96	550.16	2.1045
170	0.070521	526.44	561.70	2.1453	0.058480	525.95	561.04	2.1293

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 800 kPa (Sat. T = 31.32 ^oC)				P = 1000 kPa (Sat. T = 39.38 ^oC)
Sat	0.025625	394.96	415.46	1.7140	0.020316	398.85	419.16	1.7113
40	0.027036	402.97	424.59	1.7436	0.020407	399.45	419.86	1.7135
50	0.028547	412.00	434.84	1.7758	0.021796	409.09	430.88	1.7482
60	0.029974	420.98	444.95	1.8067	0.023068	418.46	441.53	1.7806
70	0.031340	429.96	455.03	1.8365	0.024262	427.74	452.00	1.8116
80	0.032659	438.99	465.12	1.8654	0.025399	437.00	462.40	1.8415
90	0.033942	448.10	475.25	1.8937	0.026493	446.30	472.79	1.8705
100	0.035194	457.30	485.45	1.9214	0.027552	455.65	483.21	1.8988
110	0.036420	466.60	495.74	1.9486	0.028584	465.09	493.67	1.9264
120	0.037626	476.02	506.12	1.9754	0.029593	474.62	504.21	1.9536
130	0.038813	485.55	516.60	2.0017	0.030582	484.25	514.83	1.9803
140	0.039985	495.21	527.20	2.0277	0.031554	494.00	525.55	2.0065
150	0.041144	504.99	537.91	2.0533	0.032512	503.86	536.37	2.0324
160	0.042291	514.91	548.74	2.0786	0.033458	513.84	547.30	2.0579
170	0.043427	524.96	559.70	2.1036	0.034393	523.95	558.35	2.0831
180	0.044554	535.14	570.78	2.1283	0.035318	534.19	569.51	2.1081

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 1200 kPa (Sat. T = 46.31 ^oC)				P = 1400 kPa (Sat. T = 52.42 ^oC)
Sat	0.016718	401.98	422.04	1.7087	0.014110	404.54	424.30	1.7062
50	0.017201	405.77	426.41	1.7223	–	–	–	–
60	0.018404	415.70	437.79	1.7570	0.015005	412.61	433.62	1.7345
70	0.019502	425.36	448.76	1.7895	0.016060	422.77	445.25	1.7689
80	0.020530	434.90	459.53	1.8204	0.017023	432.65	456.48	1.8012
90	0.021506	444.41	470.22	1.8502	0.017923	442.42	467.52	1.8320
100	0.022443	453.94	480.87	1.8792	0.018778	452.16	478.45	1.8617
110	0.023348	463.53	491.54	1.9074	0.019597	461.91	489.34	1.8905
120	0.024228	473.18	502.25	1.9350	0.020388	471.70	500.24	1.9186
130	0.025087	482.92	513.03	1.9621	0.021156	481.55	481.55	1.9460
140	0.025928	492.76	523.87	1.9886	0.021904	491.49	522.16	1.9730
150	0.026753	502.70	534.81	2.0148	0.022637	501.52	533.21	1.9994
160	0.027566	512.76	545.84	2.0406	0.023355	511.65	544.35	2.0254
170	0.028367	522.93	556.97	2.0660	0.024062	521.90	555.58	2.0510
180	0.029159	533.23	568.22	2.0911	0.024758	532.25	566.91	2.0763

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 1600 kPa (Sat. T = 57.90 ^oC)				P = 2000 kPa (Sat. T = 67.48 ^oC)
Sat	0.012127	406.64	426.04	1.7036	0.009291	409.70	428.28	1.6976
60	0.012373	409.04	428.84	1.7120	–	–	–	–
70	0.013430	419.91	441.40	1.7491	0.009573	412.91	432.06	1.7086
80	0.014362	430.24	453.22	1.7831	0.010539	424.70	445.78	1.7481
90	0.015216	440.32	464.66	1.8150	0.011363	435.66	458.39	1.7833
100	0.016015	450.29	475.91	1.8456	0.012105	446.24	470.45	1.8160
110	0.016773	460.22	487.06	1.8751	0.012791	456.63	482.21	1.8471
120	0.017500	470.16	498.16	1.9037	0.013436	466.93	493.80	1.8770
130	0.018202	480.15	509.27	1.9316	0.014051	477.21	505.31	1.9059
140	0.018882	490.19	520.40	1.9589	0.014640	487.49	516.78	1.9340
150	0.019546	500.32	531.59	1.9856	0.015210	497.82	528.24	1.9614
160	0.020194	510.53	542.84	2.0119	0.015764	508.21	539.74	1.9883
180	0.021456	531.26	565.59	2.0632	0.016830	529.23	562.89	2.0405

T (^oC)	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK	v m³/kg	u kJ/kg	h kJ/kg	s kJ/kgK
	P = 3000 kPa (Sat. T = 86.20^oC)				P = 4000 kPa (Sat. T = 100.34 ^oC)
Sat	0.005281	411.50	427.34	1.6748	0.002563	395.13	405.38	1.6046
90	0.005752	418.53	435.78	1.6982	–	–	–	–
100	0.006641	433.18	453.10	1.7453	–	–	–	–
110	0.007327	445.79	467.77	1.7841	0.004273	429.17	446.26	1.7131
120	0.007917	457.57	481.32	1.8190	0.004993	445.13	465.10	1.7616
130	0.008447	468.92	494.26	1.8515	0.005549	458.71	480.90	1.8013
140	0.008937	480.05	506.86	1.8824	0.006024	471.28	495.38	1.8368
150	0.009396	491.05	519.24	1.9120	0.006450	483.32	509.12	1.8697
160	0.009832	502.00	531.50	1.9406	0.006842	495.07	522.43	1.9008
170	0.010250	512.93	543.68	1.9684	0.007208	506.64	535.47	1.9305
180	0.010652	523.89	555.84	1.9956	0.007554	518.11	548.33	1.9592

Reference States, IIR Convention

Enthalpy H = 200 kJ/kg at 0°C for saturated liquid.
Entropy S = 1 kJ/kg-K at 0°C for saturated liquid.

Source: Eric W. Lemmon, Mark O. McLinden and Daniel G. Friend, “Thermophysical Properties of Fluid Systems” in NIST Chemistry WebBook, NIST Standard Reference Database Number 69, Eds. P.J. Linstrom and W.G. Mallard, National Institute of Standards and Technology, Gaithersburg MD, 20899, https://doi.org/10.18434/T4D303, (retrieved May 2021).