Thermodynamic Properties (R134A)

Komposition:

100 % 1,1,1,2-Tetrofluorethan (CF3CH2F)

Anwendung:

Haushaltsgeräte, Kühlung (gewerbliche und unabhängige Geräte), Zentrifugalkühler und Kfz-Klimaanlagen

Leistung:

  • Industriestandard für Kfz-Klimaanlagen und Kleingeräte
  • In den letzten 20 Jahren für R-134a optimierte Ausrüstung

Schmiermittel:

Kompatibel mit Polyolester-Schmiermitteln für stationäre Geräte und polyalkalischem Glykol für Kfz-Klimaanlagen

Thermodynamische Eigenschaften

Edit
TEMP. (F)
Druckflüssigkeit (psia)
Dichte Flüssigkeit (lb/ftˆ3)
Dichte Dampf (lb/ftˆ3)
Enthalpieflüssigkeit (Btu/lb)
Enthalpiedampf (Btu/lb)
Entropieflüssigkeit (Btu/R-lb)
Entropiedampf (Btu/R-lb)
-60
4.0
90.49
0.0969
-5.957
94.13
-0.01452
0.2359
-55
4.7
90.00
0.1127
-4.476
94.89
-0.01085
0.2347
-50
5.5
89.50
0.1305
-2.989
95.65
-0.00720
0.2336
-45
6.4
89.00
0.1505
-1.498
96.41
-0.00358
0.2325
-40
7.4
88.50
0.1729
0.000
97.17
0.00000
0.2315
-35
8.6
88.00
0.1978
1.503
97.92
0.00356
0.2306
-30
9.9
87.49
0.2256
3.013
98.68
0.00708
0.2297
-25
11.3
86.98
0.2563
4.529
99.43
0.01058
0.2289
-20
12.9
86.47
0.2903
6.051
100.2
0.01406
0.2282
-15
15.3
85.95
0.3277
7.580
100.9
0.01751
0.2274
-10
16.6
85.43
0.3689
9.115
101.7
0.02093
0.2268
-5
18.8
84.90
0.4140
10.66
102.4
0.02433
0.2262
0
21.2
84.37
0.4634
12.21
103.2
0.02771
0.2256
5
23.8
83.83
0.5173
13.76
103.9
0.03107
0.2250
10
26.6
83.29
0.5761
15.33
104.6
0.03440
0.2245
15
29.7
82.74
0.6401
16.90
105.3
0.03772
0.2240
20
33.1
82.19
0.7095
18.48
106.1
0.04101
0.2236
25
36.8
81.63
0.7848
20.07
106.8
0.04429
0.2232
30
40.8
81.06
0.8663
21.67
107.5
0.04755
0.2228
35
45.1
80.49
0.9544
23.27
108.2
0.05079
0.2224
40
49.7
79.90
1.050
24.89
108.9
0.05402
0.2221
45
54.8
79.32
1.152
26.51
109.5
0.05724
0.2217
50
60.2
78.72
1.263
28.15
110.2
0.06044
0.2214
55
65.9
78.11
1.382
29.80
110.9
0.06362
0.2212
60
72.2
77.50
1.510
31.45
111.5
0.06680
0.2209
65
78.8
76.87
1.647
33.12
112.2
0.06996
0.2206
70
85.8
76.24
1.795
34.80
112.8
0.07311
0.2204
75
93.5
75.59
1.953
36.49
113.4
0.07626
0.2201
80
101.4
74.94
2.123
38.20
114.0
0.07939
0.2199
85
109.9
74.27
2.305
39.91
114.6
0.08252
0.2197
90
119.0
73.58
2.501
41.65
115.2
0.08565
0.2194
95
128.6
72.88
2.710
43.39
115.7
0.08877
0.2192
100
138.9
72.17
2.935
45.15
116.3
0.09188
0.2190
105
149.7
71.44
3.176
46.93
116.8
0.09500
0.2187
110
161.1
70.69
3.435
48.73
117.3
0.09811
0.2185
115
173.1
69.93
3.713
50.55
117.8
0.1012
0.2183
120
185.9
69.14
4.012
52.38
118.3
0.1044
0.2180
125
199.3
68.32
4.333
54.24
118.7
0.1075
0.2177
130
213.4
67.49
4.679
56.12
119.1
0.1106
0.2174
135
228.3
66.62
5.052
58.02
119.5
0.1138
0.2171
140
243.9
65.73
5.455
59.95
119.8
0.1169
0.2167
145
260.4
64.80
5.892
61.92
120.1
0.1201
0.2163
150
277.6
63.83
6.366
63.91
120.4
0.1233
0.2159
155
295.7
62.82
6.882
65.94
120.6
0.1265
0.2154
160
314.7
61.76
7.447
68.00
120.7
0.1298
0.2149

FREQUENTLY ASKED QUESTIONS

What are the key advantages of R134a in refrigeration applications?
R134a is an industry-standard choice for automotive air conditioning and small appliances due to its excellent thermodynamic properties, non-flammability, and non-toxicity. Its low boiling point and high latent heat of vaporization make it an efficient refrigerant for cooling applications. Additionally, equipment optimized for R134a over the last 20 years has led to improved system performance and reliability.
How does the lubricant compatibility of R134a impact system design?

R134a is compatible with polyolester lubricant for stationary equipment and polyalkaline glycol for automotive air conditioning systems. This compatibility ensures that the lubricant does not react with the refrigerant, which can lead to system failure or degradation. System designers should select lubricants that are compatible with R134a to ensure reliable operation and minimize maintenance needs.

What are the critical thermodynamic properties of R134a that affect system performance?

The critical thermodynamic properties of R134a that affect system performance include its boiling point, latent heat of vaporization, and specific heat capacity. These properties determine the refrigerant’s ability to absorb and release heat, which in turn affects the system’s cooling capacity, efficiency, and stability. Understanding these properties is essential for designing and optimizing refrigeration systems that use R134a.

How does the pressure-temperature relationship of R134a impact system design and operation?

The pressure-temperature relationship of R134a is critical in refrigeration system design and operation. The table of thermodynamic properties provided shows the relationship between temperature and pressure for R134a. This relationship is used to determine the operating conditions of the system, such as the condenser and evaporator pressures, which in turn affect the system’s performance and efficiency. Accurate knowledge of this relationship is essential for designing and operating reliable and efficient refrigeration systems.

What are the implications of R134a’s thermodynamic properties on system sizing and selection?

The thermodynamic properties of R134a have significant implications for system sizing and selection. For example, the refrigerant’s latent heat of vaporization affects the required compressor size and power consumption. The specific heat capacity of R134a also influences the system’s ability to absorb and release heat, which affects the sizing of heat exchangers and other system components. Understanding these implications is essential for selecting the right system components and ensuring optimal system performance.

How do the thermodynamic properties of R134a compare to other refrigerants?

The thermodynamic properties of R134a are unique compared to other refrigerants. For example, R134a has a lower boiling point and higher latent heat of vaporization than R22, making it a more efficient refrigerant for low-temperature applications. In contrast, R410A has a higher pressure-temperature relationship than R134a, which affects system design and operation. Understanding the differences in thermodynamic properties between refrigerants is essential for selecting the right refrigerant for a given application.

What are the implications of R134a’s thermodynamic properties on system sizing and selection?

The thermodynamic properties of R134a have significant implications for system sizing and selection. For example, the refrigerant’s latent heat of vaporization affects the required compressor size and power consumption. The specific heat capacity of R134a also influences the system’s ability to absorb and release heat, which affects the sizing of heat exchangers and other system components. Understanding these implications is essential for selecting the right system components and ensuring optimal system performance.