A

R134a Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
-50	29.89	-9	208.76	31	792.43
-49	31.65	-8	217.04	32	815.28
-48	33.5	-7	225.57	33	838.63
-47	35.43	-6	234.36	34	862.47
-46	37.45	-5	243.41	35	886.82
-45	39.56	-4	252.73	36	911.68
-44	41.77	-3	262.33	37	937.07
-43	44.08	-2	272.21	38	962.98
-42	46.49	-1	282.37	39	989.42
-41	49.01	0	292.82	40	1016.4
-40	51.64	1	303.57	41	1043.9
-39	54.38	2	314.62	42	1072
-38	57.23	3	325.98	43	1100.7
-37	60.21	4	337.65	44	1129.9
-36	63.31	5	349.63	45	1159.7
-35	66.54	6	361.95	46	1190.1
-34	69.9	7	374.59	47	1221.1
-33	73.4	8	387.56	48	1252.6
-32	77.03	9	400.88	49	1284.8
-31	80.81	10	414.55
-30	84.73	11	428.57
-29	88.81	12	442.94
-28	93.04	13	457.68
-27	97.43	14	472.8
-26	101.99	15	488.29
-25	106.71	16	504.16
-24	111.6	17	520.42
-23	116.67	18	537.08
-22	121.92	19	554.14
-21	127.36	20	571.6
-20	132.99	21	589.48
-19	138.81	22	607.78
-18	144.83	23	626.5
-17	151.05	24	645.66
-16	157.48	25	665.26
-15	164.13	26	685.3
-14	170.99	27	705.8
-13	178.08	28	726.75
-12	185.4	29	748.17
-11	192.95	30	770.06
-10	200.73
Temperature Unit: centigrade
Remark: 1KPa≈0.01kg/cm2=0.001MPa，1kg/cm2 ≈98.0665KPa≈0.1MPa

A

R290 Refrigerant Temperature and Relative Pressure
Pressure kpa	Temp.	Pressure kpa	Temp.
℃	kg/cm²	℃	kg/cm²
-42.412	1	40.959	14
-32.818	1.5	42.495	14.5
-25.451	2	43,993	15
-19.382	2.5	45.455	15.5
-14.176	3	46.882	16
-9.5889	3.5	48.277	16.5
-5.4707	4	49.642	17
-1.7215	4.5	50.977	17.5
1.7287	5	52.285	18
4.931	5.5	53.566	18.5
7.9241	6	54.822	19
10.738	6,5	56.054	19.5
13.396	7	57.262	20
15.918	7.5	58.449	20.5
18.318	8	59.614	21
20.611	8.5	60.759	21.5
22.806	9	61.884	22
24.914	9.5	62.991	22.5
26.942	10	64.079	23
28.897	10.5	65.15	23.5
30.785	11	66.204	24
32.611	11.5	67.241	24.5
34.38	12	68.263	25
36.096	12.5
37.763	13
39.383	13.5

A

R600a Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
-50	0.0168	-10	0.108	14	0.252	38	0.511	70	1.087
-45	0.0221	-9	0.113	15	0.261	39	0.524	75	1.21
-40	0.0287	-8	0.117	16	0.27	40	0.538	80	1.344
-35	0.0367	-7	0.122	17	0.277	41	0.552	85	1.487
-30	0.0466	-6	0.127	18	0.287	42	0.566	90	1.642
-29	0.049	-5	0.131	19	0.294	43	0.581
-28	0.051	-4	0.133	20	0.305	44	0.596
-27	0.054	-3	0.142	21	0.313	45	0.612
-26	0.056	-2	0.147	22	0.324	46	0.628
-25	0.058	-1	0.152	23	0.332	47	0.645
-24	0.061	0	0.158	24	0.344	48	0.661
-23	0.064	1	0.164	25	0.353	49	0.679
-22	0.067	2	0.168	26	0.365	50	0.69
-21	0.07	3	0.176	27	0.375	51	0.709
-20	0.072	4	0.182	28	0.385	52	0.727
-19	0.076	5	0.187	29	0.398	53	0.746
-18	0.079	6	0.195	30	0.408	54	0.766
-17	0.082	7	0.201	31	0.419	55	0.786
-16	0.085	8	0.208	32	0.43	56	0.799
-15	0.09	9	0.215	33	0.445	57	0.82
-14	0.093	10	0.222	34	0.457	58	0.842
-13	0.097	11	0.229	35	0.469	59	0.856
-12	0.1	12	0.237	36	0.481	60	0.894
-11	0.105	13	0.245	37	0.494	65	0.974

A

R410a Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
-65	0.052	-39	0.188	-13	0.52	13	1.18	39	2.35
-64	0.054	-38	0.196	-12	0.538	14	1.22	40	2.41
-63	0.057	-37	0.206	-11	0.556	15	1.25	41	2.46
-62	0.061	-36	0.215	-10	0.579	16	1.28	42	2.51
-61	0.064	-35	0.224	-9	0.598	17	1.32	43	2.58
-60	0.068	-34	0.235	-8	0.618	18	1.35	44	2.65
-59	0.072	-33	0.243	-7	0.639	19	1.4	45	2.71
-58	0.076	-32	0.255	-6	0.66	20	1.44	46	2.77
-57	0.08	-31	0.264	-5	0.682	21	1.47	47	2.84
-56	0.084	-30	0.275	-4	0.705	22	1.52	48	2.91
-55	0.089	-29	0.286	-3	0.728	23	1.56	49	2.98
-54	0.093	-28	0.298	-2	0.752	24	1.6	50	3.05
-53	0.098	-27	0.311	-1	0.777	25	1.64	51	3.1
-52	0.103	-26	0.324	0	0.803	26	1.68	52	3.18
-51	0.108	-25	0.334	1	0.823	27	1.73	53	3.25
-50	0.113	-24	0.348	2	0.851	28	1.78	54	3.32
-49	0.119	-23	0.363	3	0.879	29	1.82	55	3.4
-48	0.125	-22	0.375	4	0.903	30	1.88	56	3.48
-47	0.131	-21	0.391	5	0.937	31	1.91	57	3.54
-46	0.138	-20	0.404	6	0.962	32	1.96	58	3.63
-45	0.144	-19	0.424	7	0.994	33	2.03	59	3.72
-44	0.151	-18	0.435	8	1.02	34	2.08	60	3.78
-43	0.157	-17	0.453	9	1.05	35	2.13	61	3.9
-42	0.165	-16	0.468	10	1.09	36	2.18	62	3.97
-41	0.172	-15	0.483	11	1.11	37	2.24
-40	0.181	-14	0.504	12	1.15	38	2.29

A

R404a Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
-60	0.05	-31	0.2	-2	0.569	27	1.31	56	2.63
-59	0.053	-30	0.208	-1	0.588	28	1.36	57	2.68
-58	0.056	-29	0.217	0	0.608	29	1.39	58	2.74
-57	0.059	-28	0.226	1	0.628	30	1.43	59	2.81
-56	0.062	-27	0.235	2	0.645	31	1.46	60	2.86
-55	0.066	-26	0.243	3	0.665	32	1.5	61	2.93
-54	0.069	-25	0.253	4	0.687	33	1.53	62	2.98
-53	0.072	-24	0.264	5	0.71	34	1.57	63	3.05
-52	0.076	-23	0.275	6	0.73	35	1.61	64	3.13
-51	0.08	-22	0.284	7	0.752	36	1.66	65	3.19
-50	0.084	-21	0.296	8	0.777	37	1.69	66	3.26
-49	0.089	-20	0.306	9	0.8	38	1.73	67	3.31
-48	0.093	-19	0.318	10	0.823	39	1.78	68	3.4
-47	0.098	-18	0.33	11	0.85	40	1.82	69	3.45
-46	0.103	-17	0.343	12	0.872	41	1.87	70	3.54
-45	0.108	-16	0.354	13	0.9	42	1.91	71	3.6
-44	0.112	-15	0.368	14	0.923	43	1.96	72	3.69
-43	0.118	-14	0.381	15	0.95	44	2.03	73	3.75
-42	0.124	-13	0.394	16	0.978	45	2.06	74	3.81
-41	0.129	-12	0.407	17	1.01	46	2.09	75	3.87
-40	0.136	-11	0.424	18	1.04	47	2.15
-39	0.141	-10	0.438	19	1.06	48	2.2
-38	0.149	-9	0.453	20	1.09	49	2.25
-37	0.155	-8	0.468	21	1.12	50	2.29

A  

R407c Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
-56	0.050	-25	0.219	6	0.669	37	1.60
-55	0.053	-24	0.228	7	0.690	38	1.64
-54	0.056	-23	0.224	8	0.712	39	1.69
-53	0.059	-22	0.248	9	0.734	40	1.73
-52	0.062	-21	0.257	10	0.757	41	1.78
-51	0.066	-20	0.267	11	0.780	42	1.82
-50	0.069	-19	0.278	12	0.804	43	1.87
-49	0.073	-18	0.288	13	0.829	44	1.91
-48	0.077	-17	0.300	14	0.855	45	1.95
-47	0.081	-16	0.311	15	0.875	46	2.00
-46	0.085	-15	0.321	16	0.902	47	2.05
-45	0.089	-14	0.336	17	0.939	48	2.11
-44	0.094	-13	0.349	18	0.959	49	2.16
-43	0.098	-12	0.360	19	0.989	50	2.21
-42	0.103	-11	0.374	20	1.02	51	2.26
-41	0.108	-10	0.389	21	1.04	52	2.31
-40	0.113	-9	0.401	22	1.08	53	2.37
-39	0.119	-8	0.417	23	1.11	54	2.42
-38	0.124	-7	0.429	24	1.14	55	2.48
-37	0.130	-6	0.446	25	1.17	56	2.54
-36	0.136	-5	0.464	26	1.21	57	2.59
-35	0.142	-4	0.478	27	1.23	58	2.65
-34	0.149	-3	0.497	28	1.27	59	2.72
-33	0.155	-2	0.516	29	1.30	60	2.78
-32	0.162	-1	0.532	30	1.33
-31	0.170	0	0.549	31	1.37
-30	0.177	1	0.566	32	1.41
-29	0.185	2	0.588	33	1.45
-28	0.194	3	0.606	34	1.49
-27	0.201	4	0.625	35	1.52
-26	0.209	5	0.649	36	1.57

A   

R32 Refrigerant Temperature and Relative Pressure
Temp.	Pressure kpa	Temp.	Pressure kpa	Temp.	Pressure kpa
℃	kg/cm²	℃	kg/cm²	℃	kg/cm²
-51.909	1	18.138	14	43.55	27
-43.635	1.5	19.395	14.5	44.32	27.5
-37.323	2	20.619	15	45.079	28
-32.15	2.5	21.813	15.5	45.828	28.5
-27.731	3	22.978	16	46.567	29
-23.85	3.5	24.116	16.5	47.296	29.5
-20.378	4	25.229	17	48.015	30
-17.225	4.5	26.317	17.5	48.726	30.5
-14.331	5	27.382	18	49.428	31
-11.65	5.5	28.425	18.5	50.121	31.5
-9.1503	6	29.447	19	50.806	32
-6.8046	6,5	30.448	19.5	51.482	32.5
-4.6925	7	31.431	20	52.15	33
-2.4975	7.5	32.395	20.5	52.811	33.5
-0.50613	8	33.341	21	53.464	34
1.393	8.5	34.271	21.5	54.11	34.5
3.2092	9	35.184	22	54.748	35
4.9506	9.5	36.082	22.5
6.624	10	36.965	23
8.2352	10.5	37.834	23.5
9.7896	11	38.688	24
11.291	11.5	39.529	24.5
12.745	12	40.358	25
14.153	12.5	41.173	25.5
15.52	13	41.977	26
16.847	13.5	42.769	26.5

A

R507 Refrigerant Temperature and Relative Pressure
Temperature（℃）	Pressure（bar)	Temperature（℃）	Pressure（bar)	Temperature（℃）	Pressure（bar)	Temperature（℃）	Pressure（bar)
-40	1.39	-38	1.52	-36	1.65	-34	1.8
-32	1.96	-30	2.13	-28	2.5	-26	2.6
-24	2.7	-22	2.92	-20	3.14	-18	3.39
-16	3.64	-14	3.91	-12	4.2	-10	4.5
-8	4.81	-6	5.14	-4	5.49	-2	5.86
0	6.24	2	6.65	4	7.07	6	7.51
8	7.98	10	8.46	12	8.97	14	9.49
16	10.05	18	10.62	20	11.22	22	11.81
24	12.49	26	13.17	28	13.87	30	14.6
32	15.36	34	16.15	36	16.97	38	17.81
40	18.7	42	19.61	44	20.56	46	21.54

A

1. Thermodynamic Performance

R1234yf was designed to closely match the performance of R134a while offering a much lower environmental impact. Here’s how it compares:

Key Observations:

• Cooling Efficiency: R1234yf provides similar but slightly lower cooling capacity than R134a, requiring system adjustments (e.g., larger heat exchangers or higher compressor speeds in some cases).

• Pressure Behavior: Operates at slightly lower pressures than R134a under normal conditions but may approach similar levels at high ambient temperatures.

• Compatibility with Lubricants: Typically uses POE (Polyolester) oils, similar to R134a systems, but requires strict moisture control.

2. Safety Handling & Flammability Considerations

R1234yf is classified as A2L (low flammability) under ASHRAE Standard 34, meaning it burns very slowly and requires a high ignition energy.

Safety Risks & Mitigation Strategies

A R410A refrigerant and R22 refrigerant are the two mainstream domestic air-conditioning refrigerants at this stage. Many people know that R410A is an environmentally friendly refrigerant, and R22 is a Freon that will be eliminated, but it is not clear why R410a is more environmentally friendly than R22. Following Frioflor refrigerant gas will give you an analysis.