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Delayed breaker for viscoelastic surfactant-based fluids

A working medium and heat cycle technology, applied in irreversible cycle compression machines, heat exchange materials, lighting and heating equipment, etc., can solve problems such as GWP increase

Active Publication Date: 2017-08-29
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the GWP of HFC-32 is as high as 675, so the mixture of HFO-1123 and HFC-32 results in a higher GWP

Method used

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  • Delayed breaker for viscoelastic surfactant-based fluids
  • Delayed breaker for viscoelastic surfactant-based fluids
  • Delayed breaker for viscoelastic surfactant-based fluids

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0032] In this embodiment, an example in which the working medium of the present invention is applied to a refrigerant of a vapor compression refrigeration cycle device used in a vehicle air conditioner will be described.

[0033] Such as figure 1 As shown, the refrigeration cycle apparatus 100 of this embodiment includes a compressor 101, a condenser 102, an expansion valve 103, an evaporator 104, and the like. The compressor 101, the condenser 102, the expansion valve 103, and the evaporator 104 are sequentially connected via piping.

[0034] The compressor 101 is a device having a refrigerant suction port 101a and a refrigerant discharge port 101b, compresses the refrigerant sucked from the refrigerant suction port 101a, and discharges the compressed refrigerant from the refrigerant discharge port 101b. The condenser 102 is a radiator that radiates heat and condenses the gas-phase refrigerant discharged from the compressor 101 by exchanging heat with the air outside the ve...

Embodiment 1

[0108] The GWP of the refrigerant of Example 1 is about 150, and satisfies GWP150 or less.

[0109] (2) Critical temperature

[0110] As described above, it is preferable that the refrigerant for vehicles can keep the condensation temperature of the refrigerant below the critical temperature even in regions where the temperature is extremely high, such as the Middle East and the Near East. When the outside air temperature is 50°C, the condensation temperature is 75 to 85°C. Therefore, the critical temperature of the refrigerant is preferably 85° C. or higher.

[0111] The critical temperature value of the refrigerant in Example 1 is about 86°C, which satisfies the target of 85°C or higher.

[0112] (3) Flammability

[0113] The refrigerant of Example 1 is compared with the mixed refrigerant of HFO-1123 and HFC-32 whose mass ratio of HFO-1123 and HFC-32 is HFO-1123:HFC-32=6:4, HFC- Less 32, more HFO-1234ze(E). Therefore, the combustibility of the refrigerant of Example 1 w...

no. 2 approach

[0124] The refrigerant of this embodiment contains HFO-1234yf (2,3,3,3-tetrafluoro-1-propene) in addition to the three components of the refrigerant of the first embodiment. That is, the refrigerant of the present embodiment is mixed with four components of HFO-1123, HFC-32, HFO-1234ze, and HFO-1234yf as main components.

[0125] As shown in Table 1, HFO-1234yf has a GWP of 1, which is very low compared to 675 of HFC-32. Furthermore, the critical temperature of HFO-1234yf is 94.7°C, which is very high compared to 59.2°C of HFO-1123 and 78.1°C of HFC-32. Also, the burning rate of HFO-1234yf is lower than that of HFC-32.

[0126] Therefore, even with the refrigerant of the present embodiment, the same effects as those of the refrigerant of the first embodiment can be obtained with respect to GWP, critical temperature, and combustibility.

[0127] Also, the GWP value of HFO-1234yf is the same as that of HFO-1234ze. Therefore, similarly to the first embodiment, in the refrigera...

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Abstract

Compositions and methods are provided for delayed breaking of viscoelastic surfactant gels inside subterranean formations. Breaking is accomplished without mechanical intervention or use of a second fluid. The delayed breaking agent is selected from alkyl ether phosphates and salts thereof, alkylaryl ether phosphates and salts thereof, alkyl sulfates and salts thereof, alkylaryl sulfates and salts thereof, alkyl ether sulfates and salts thereof, alkylaryl ether sulfates and salts thereof, and mixtures of any of the foregoing. The viscoelastic surfactant can be a zwitterionic surfactant, and can be selected from the group consisting of sultaines, betaines, and amidoamine oxides.

Description

[0001] Cross-references to related applications [0002] This application is based on the JP Patent application 2015-7068 for which it applied on January 16, 2015, The whole content is incorporated in this application by reference here. technical field [0003] The invention relates to a working medium for thermal cycle. Background technique [0004] In a heat cycle device, for example, as a working medium for heat cycle (hereinafter referred to simply as a working medium) used in a refrigeration cycle device, a Rankine cycle device, a heat pump cycle device, a heat transport device, etc., Patent Document 1 discloses HFO-1123 and HFC-32 two-component mixture. The working medium composed of a mixture of HFO-1123 and HFC-32 contains HFO-1123, so it has excellent cycle performance. [0005] prior art literature [0006] patent documents [0007] Patent Document 1: International Publication WO2012 / 157764 Pamphlet [0008] However, the mixture of HFO-1123 and HFC-32 has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/126C09K5/047C09K2205/22C10M171/008F25B1/08F25B9/006
Inventor 西田伸
Owner DENSO CORP
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