Thermodynamische Eigenschaften (R407A)

Komposition:

(R-32 / 125 / 134a) • (20 / 40 / 40 Gew.-%)

Ersetzt:

R-22

Anwendung:

Gewerbe- und Industriekühlung bei mittleren und niedrigen Temperaturen

Leistung:

  • Niedrigere Austrittstemperatur
  • Die Kapazität entspricht am ehesten der von R-22
  • Ähnliche P/T- und Strömungseigenschaften = keine Komponentenänderungen

Schmiermittel:

Polyolester-Schmiermittel

Thermodynamische Eigenschaften

Edit
TEMP. (F)
Druckflüssigkeit (psia)
Druckdampf (psia)
Dichte Flüssigkeit (lb/ftˆ3)
Dichte Dampf (lb/ftˆ3)
Enthalpieflüssigkeit (Btu/lb)
Enthalpiedampf (Btu/lb)
Entropieflüssigkeit (Btu/R-lb)
Entropiedampf (Btu/R-lb)
-60
10.8
7.6
88.81
0.164
-6.1454
95.41
-0.01496
0.2434
-55
12.5
8.9
88.26
0.189
-4.6163
96.12
-0.01117
0.2418
-50
14.3
10.3
87.72
0.218
-3.0826
96.82
-0.00741
0.2404
-45
16.4
11.9
87.17
0.250
-1.5440
97.52
-0.00369
0.2390
-40
18.6
13.7
86.61
0.285
0.000
98.21
0.00000
0.2376
-35
21.1
15.7
86.05
0.325
1.5496
98.90
0.00366
0.2364
-30
23.9
18.0
85.49
0.368
3.1052
99.59
0.00729
0.2351
-25
26.9
20.4
84.92
0.416
4.6672
100.3
0.01088
0.2340
-20
30.3
23.2
84.35
0.469
6.2358
100.9
0.01446
0.2329
-15
33.9
26.2
83.77
0.527
7.8114
101.6
0.01800
0.2319
-10
37.9
29.6
83.18
0.591
9.3945
102.3
0.02152
0.2309
-5
42.2
33.2
82.59
0.660
10.99
102.9
0.02502
0.2299
0
46.9
37.2
81.99
0.736
12.58
103.6
0.02849
0.2290
5
52.0
41.6
81.39
0.818
14.19
104.2
0.03195
0.2281
10
57.5
46.3
80.77
0.908
15.81
104.8
0.03538
0.2273
15
63.4
51.4
80.15
1.005
17.44
105.4
0.03880
0.2264
20
69.8
57.0
79.52
1.111
19.07
106.0
0.04219
0.2257
25
76.7
63.0
78.88
1.225
20.72
106.6
0.04558
0.2249
30
84.0
69.5
78.23
1.349
22.38
107.2
0.04894
0.2242
35
91.9
76.5
77.57
1.482
24.05
107.8
0.05230
0.2235
40
100
84.1
76.90
1.626
25.73
108.3
0.05564
0.2228
45
109
92.1
76.21
1.782
27.42
108.9
0.05897
0.2221
50
119
101
75.52
1.949
29.13
109.4
0.06229
0.2214
55
129
110
74.81
2.130
30.85
109.9
0.06561
0.2208
60
140
120
74.08
2.325
32.59
110.4
0.06892
0.2202
65
151
130
73.34
2.534
34.35
110.9
0.07222
0.2195
70
164
142
72.58
2.760
36.12
111.3
0.07552
0.2189
75
176
154
71.80
3.003
37.91
111.7
0.07882
0.2182
80
190
166
71.01
3.265
39.72
112.1
0.08213
0.2176
85
204
180
70.19
3.548
41.55
112.5
0.08543
0.2169
90
220
194
69.34
3.853
43.40
112.9
0.08874
0.2163
95
236
209
68.48
4.183
45.27
113.2
0.09206
0.2156
100
252
225
67.58
4.539
47.17
113.4
0.09539
0.2148
105
270
242
66.65
4.925
49.10
113.7
0.09874
0.2141
110
289
260
65.69
5.345
51.06
113.9
0.1021
0.2133
115
308
279
64.69
5.801
53.06
114.1
0.1055
0.2125
120
329
299
63.64
6.298
55.09
114.2
0.1089
0.2116
125
350
320
62.55
6.843
57.16
114.2
0.1124
0.2107
130
373
342
61.39
7.443
59.28
114.2
0.1159
0.2097
135
396
365
60.17
8.106
61.45
114.1
0.1194
0.2086
140
421
390
58.87
8.843
63.69
113.9
0.1230
0.2074

FREQUENTLY ASKED QUESTIONS

What is the composition of R407A refrigerant?
The composition of R407A refrigerant is a blend of 20% R32, 40% R125, and 40% R134a by weight. This specific composition is designed to provide a close match to the performance of R22 refrigerant, which it is intended to replace.
What are the advantages of using R407A refrigerant in medium and low-temperature applications?

R407A refrigerant offers several advantages in medium and low-temperature commercial and industrial refrigeration applications. It has a lower discharge temperature, which can improve system efficiency and reduce compressor wear. Additionally, R407A has similar P-T and flow properties to R22, which means that no component changes are required when retrofitting existing systems.

What type of lubricant is recommended for use with R407A refrigerant?

Polyolester lubricant is recommended for use with R407A refrigerant. This type of lubricant is compatible with the refrigerant and helps to ensure proper system operation and longevity.

How does the pressure-temperature relationship of R407A refrigerant compare to R22?

The pressure-temperature relationship of R407A refrigerant is similar to that of R22. As shown in the thermodynamic properties table, the pressure-temperature curve of R407A is close to that of R22, which makes it a suitable replacement in many applications.

What are the implications of using R407A refrigerant on system design and operation?

The use of R407A refrigerant has implications for system design and operation. For example, the lower discharge temperature of R407A may require adjustments to compressor sizing and system piping. Additionally, the similar P-T and flow properties of R407A to R22 may require adjustments to system controls and operating parameters.

How can the thermodynamic properties of R407A refrigerant be used to optimize system performance?

The thermodynamic properties of R407A refrigerant can be used to optimize system performance by selecting the optimal operating conditions and system design parameters. For example, by analyzing the pressure-temperature relationship of R407A, designers can optimize compressor sizing, piping, and system controls to minimize energy consumption and maximize system efficiency.