Supercharge Your Innovation With Domain-Expert AI Agents!

Tetrafluoropropene-based azeotropic compositions

An azeotropic composition and composition technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of compressor lubrication deterioration, net efficiency loss, refrigerant being captured by oil, etc., and achieve the effect of improving efficiency

Active Publication Date: 2019-06-04
ARKEMA FRANCE SA
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, due to the good solubility of HFO-1234 in POE oil, a problem has been found in heat transfer systems with oil separators: a relatively large amount of refrigerant is still trapped by the oil
This leads to a net loss of efficiency of the system as the entire refrigerant does not go through the refrigeration cycle and also leads to degradation of the lubrication of the compressors, especially screw compressors due to the lower oil quantity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tetrafluoropropene-based azeotropic compositions
  • Tetrafluoropropene-based azeotropic compositions
  • Tetrafluoropropene-based azeotropic compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0294] Supplier of POE Triton SE 55d oil: FUCHS

[0295] In oil separators integrated in screw compressors, the oil is recovered in the lower part of the separator. In this example, the amount of refrigerant trapped by the oil in the separator is analyzed.

[0296] The coolant / oil mixture in the separator is at temperature Ts (which is also the temperature of the refrigerant at the outlet of the compressor) and the pressure in the separator is equal to the refrigerant vapor saturation pressure (Pcond) at the inlet of the condenser. This therefore allows the system to operate at the condensation temperature (Tcond), which is the saturation temperature of the individual refrigerant at the corresponding Pcond pressure.

[0297] Typically, analysis of typical refrigerant / oil diagrams (such as e.g. figure 1 shown for R134a in ) shows that at constant pressure (Pcond), the concentration of refrigerant in the oil increases as the temperature of the mixture (oil / refrigerant, Ts) in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to azeotropic compositions comprising: between 74 and 81.5 wt.-% HFO-1324yf, between 6.5 and 10.5 wt.-% HFC-134a, and between 12 and 16 wt.-% HFC-152a, relative to the total weight of the composition, said azeotropic composition having a boiling point of between -40.00 and 70.00 deg c, at a pressure of between 0.5 and 21.0 bar abs (+ / - 0,5%). The invention also relates to the uses of the aforementioned compositions in heat transfer systems.

Description

technical field [0001] The present invention relates to tetrafluoropropene-based azeotropic compositions and their use as heat transfer fluids, especially in refrigeration, air conditioning and heat pumps. Background technique [0002] Problems posed by substances that deplete the ozone layer of the atmosphere were discussed in Montreal, where a protocol to mandate the reduction in the production and use of chlorofluorocarbons (CFCs) was signed. The protocol has been amended to phase out the use of CFCs and expand the regulations to include other products, including hydrochlorofluorocarbons (HCFCs). [0003] The refrigeration and air-conditioning industry has invested heavily in replacements (alternatives) to these refrigerants, so hydrofluorocarbons (HFCs) have come to market. [0004] In the automotive industry, air-conditioning systems for vehicles marketed in many countries have changed from chlorofluorocarbon (CFC-12) refrigerants to hydrofluorocarbons (1,1,1,2 tetrafl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K5/04
CPCC09K5/045C09K2205/126C09K2205/22C09K2205/32C09K2205/122
Inventor W.拉切德
Owner ARKEMA FRANCE SA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com