COMPOSITION OF FLUOROOLEFIN AND FLUOROALKANE

Abstract

The present invention provides a composition of fluoroolefin and fluoroalkane, comprising, by weight, 70 to 80 parts of 2,3,3,3-tetrafluoropropene, 10 to 20 parts of trans-1,3,3,3-tetrafluoropropene, 5-10 parts of 1,1,1,2-tetrafluoroethane, and 2 to 5 parts of difluoromethane. The composition of the present disclosure has the advantages of low GWP, good environmentally friendliness, good refrigeration effect, and good lubricant compatibility.

Claims

1. A composition of fluoroolefin and fluoroalkane, comprising, by weight, 70 to 80 parts of 2,3,3,3-tetrafluoropropene, 10 to 20 parts of trans-1,3,3,3-tetrafluoropropene, 5-10 parts of 1,1,1,2-tetrafluoroethane, and 2 to 5 parts of difluoromethane.

2. The composition of fluoroolefin and fluoroalkane according to claim 1, further including a lubricant, the lubricant including one or two of mineral oil, silicone oil, polyol ester, polyalkylene glycol, and polyalkylbenzene.

3. The composition of fluoroolefin and fluoroalkane according to claim 1, having a GWP (Global Warming Potential) not greater than 150.

4. A preparation method of the composition of fluoroolefin and fluoroalkane according to claim 1, comprising a step of physically mixing 2,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane, and difluoromethane in a liquid phase state according to their weight percentages, to obtain the composition of fluoroolefin and fluoroalkane.

Description

DESCRIPTION OF THE EMBODIMENTS

[0032] The present disclosure is further illustrated by the following specific embodiments, but the present disclosure is not limited to the embodiments described.

Embodiments 1-5

[0033] 2,3,3,3-tetrafluoropropene, trans-1,3,3,3-tetrafluoropropene, 1,1,1,2-tetrafluoroethane, difluoromethane were mixed, in parts by weight, in a liquid phase state, to obtain a composition. The composition is shown in Table 1.

TABLE-US-00001 TABLE 1 Compositions of the composition obtained in Examples 1 to 5 Exam- Composition HFO-1234ze ple number HFO-1234yf (E) HFC-134a HFC-32 1 1# 70 20 5 5 2 2# 80 10 8 2 3 3# 70 15 10 5 4 4# 75 17 5 3 5 5# 80 12 5 3 Note: the unit is kg.

[0034] Performance Test

[0035] (1) Testing on Relative COP, Relative Capacity, Discharge Temperature

[0036] The inlet temperature of the compressor was set to 50° C., the COP value, relative capacity and discharge temperature of the test substance were tested within the temperature ranges of the condenser and an evaporator. The results are shown in Table 2.

TABLE-US-00002 TABLE 2 Performance of the compositions obtained in Examples 1 to 5 Relative Relative Discharge Test substance COP capacity temperature HFC-134a 1.00 1.00 175 HFO-1234yf 0.98 1.10 168 HFO-1234ze (E) 1.04 0.70 165 1# composite 1.03 1.08 171 2# composite 1.05 1.12 166 3# composite 1.08 1.11 168 4# composite 1.02 1.07 169 5# composite 1.10 1.02 163

[0037] It can be seen from Table 2 that the composition of the present disclosure has higher energy efficiency than HFC-134a, and the compressor using the composition of the present disclosure will produce a lower discharge temperature than HFC-134a.

[0038] (2) Miscibility Test

[0039] The tested lubricants were mineral oil (C3), silicone oil, alkylbenzene (Zerol 150), polyalkylene glycol (PAG) and polyol ester. During the test, two of the lubricants were selected and mixed in a dose of 50 wt % each, and then mixed with the test substance.

[0040] A small compressor was used and the test substance/lubricant composition was put in the compressor to test the compatibility of the test substance/lubricant composition with a lubricant when it came into contact with a metal used in the refrigeration system at 40° C. It was determined that the test substance/lubricant was miscible in all test ratios over the entire temperature range. The test substance/lubricant compositions were as follows:

[0041] (a) HFO-1234ze and mineral oil/silicone oil

[0042] (b) HFO-1234yf and polyalkylene glycol/silicone oil

[0043] (c) 1# composition and alkylbenzene/silicone oil

[0044] (d) 2# composition and polyalkylene glycol/polyol ester

[0045] (e) 3# composition and polyalkylene glycol/alkylbenzene

[0046] (f) 4# composition and silicone oil/alkylbenzene

[0047] During the test, it was found that the composition of the present disclosure had higher stability when it came into contact with the lubricant in the compressor refrigeration system.

[0048] (3) Flammability Test

[0049] Flammability test: The flammability test was carried out in accordance with the American ASTM-E681-01 standard, where LFL refers to the lower limit of the flammability limit; the larger the LFL value, the lower the flammability. The results are shown in Table 3.

TABLE-US-00003 TABLE 3 Combustibility comparison of compositions Test substance 1# 2# 3# 4# 5# HFO-1234yf LFL value 6.74 6.35 6.17 6.43 6.28 6.2 (Volume %)