1-Ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane refrigerant compositions comprising functionalized organic compounds and uses thereof

a technology of non-fluorobutane and refrigerant composition, which is applied in the direction of heat exchange elements, chemistry apparatuses and processes, etc., can solve the problems of toxic and/or flammable replacements of hfc refrigerants, global phase out of certain hfc refrigerants,

Inactive Publication Date: 2005-12-29
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0026] The present invention further relates to azeotropic or near-azeotropic refrigerant compositions. These compositions are useful in refrigera

Problems solved by technology

Further environmental regulations may ultimately cause global phase out of certain HFC refrigerants.
Many of these suggested replacements are toxic and / or flammable.

Method used

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  • 1-Ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane refrigerant compositions comprising functionalized organic compounds and uses thereof
  • 1-Ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane refrigerant compositions comprising functionalized organic compounds and uses thereof
  • 1-Ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane refrigerant compositions comprising functionalized organic compounds and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

Impact of Vapor Leakage

[0150] A vessel is charged with an initial composition at a specified temperature, and the initial vapor pressure of the composition is measured. The composition is allowed to leak from the vessel, while the temperature is held constant, until 50 weight percent of the initial composition is removed, at which time the vapor pressure of the composition remaining in the vessel is measured. The results are summarized in Table 5 below.

TABLE 5After 50%After 50%CompoundsInitialInitialLeakLeakDeltawt % A / wt % BPsiakPaPsiakPaP %C4F9OC2H5 / acetone (67.2° C.)96.4 / 3.6 14.67101.1514.67101.150.0%99 / 1 14.73101.5614.73101.560.0%100 / 0 14.79101.9714.79101.970.0%80 / 2016.36112.8015.68108.114.2%67 / 3318.94130.5917.11117.979.7%66 / 3419.15132.0417.23118.8010.0% 0 / 10027.76191.4027.76191.400.0%C4F9OC2H5 / 1,1-dichloroethane (57.1° C.) 7.8 / 92.214.71101.4214.71101.420.0% 1 / 9914.64100.9414.63100.870.1% 0 / 10014.61100.7314.61100.730.0%20 / 8014.61100.7314.52100.110.6%40 / 6014.0496.8013.5393.293...

example 2

Tip Speed to Develop Pressure

[0152] Tip speed can be estimated by making some fundamental relationships for refrigeration equipment that use centrifugal compressors. The torque an impeller ideally imparts to a gas is defined as

T=m*(v2*r2−v1*r1)   Equation 1

where

[0153] T=torque, Newton-meters

[0154] m=mass rate of flow, kg / sec

[0155] v2=tangential velocity of refrigerant leaving impeller (tip speed), meters / sec

[0156] r2=radius of exit impeller, meters

[0157] v1=tangential velocity of refrigerant entering impeller, meters / sec

[0158] r1=radius of inlet of impeller, meters

[0159] Assuming the refrigerant enters the impeller in an essentially axial direction, the tangential component of the velocity v1=0, therefore

T=m*v2*r2   Equation 2

[0160] The power required at the shaft is the product of the torque and the rotative speed

P=T*w   Equation 3

where

[0161] P=power, W

[0162] w=angular velocity, radians / s therefore,

P=T*w=m*v2*r2*w   Equation 4

[0163] At low refrigerant flow rates...

example 3

Performance Data

[0171] The table below shows the performance of various refrigerants compared to CFC-113. The data are based on the following conditions.

Evaporator temperature 40.0° F. (4.4° C.)Condenser temperature110.0° F. (43.3° C.)Subcool temperature 10.0° F. (5.5° C.)Return gas temperature 75.0° F. (23.8° C.)Compressor efficiency is70%

[0172]

TABLE 7CompCompEvapEvapCondCondDischDischwt %PresPresPresPresTempTempCapacityCapacityCompositionC4F9OC2H5wt % B(Psia)(kPa)(Psia)(kPa)(F)(C)COP(Btu / min)(kW)CFC-1132.71912.888156.369.114.84.180.26C4F9OC2H5 plus B:acetone96.43.61.076.343133.156.24.117.20.131,1-dichloroethane7.892.21.6118.659207.497.44.3611.90.21diisopropyl ether55.544.51.397.351135.857.74.038.70.151,2-dimethoxyethane80.819.20.865.236139.459.74.075.90.10dimethoxymethane39.260.82.82014.499159.770.94.2118.80.33ethanol88.211.80.855.336153.367.44.165.90.10ethyl acetate70.529.51.176.444147.764.34.147.70.13ethyl formate55.744.32.51713.694161.271.84.1317.00.30isopropanol88.411.60.74...

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Abstract

The present invention relates to compositions for use in refrigeration and air-conditioning systems comprising 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. Further, the present invention relates to compositions for use in refrigeration and air-conditioning systems employing a centrifugal compressor comprising 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. The compositions of the present invention may be azeotropic or near-azeotropic and are useful in processes for producing cooling or heat or as heat transfer fluids.

Description

CROSS REFERENCE(S) TO RELATED APPLICATION(S) [0001] This application claims the priority benefit of U.S. Provisional Application No. 60 / 584,785, filed Jun. 29, 2004.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to compositions for use in refrigeration and air-conditioning systems comprising 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. Further, the present invention relates to compositions for use in refrigeration and air-conditioning systems employing a centrifugal compressor comprising 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, or mixtures thereof. The compositions of the present invention may be azeotropic or near-azeotropic and are useful in processes for producing cooling or heat or as heat transfer fluids. [00...

Claims

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Application Information

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IPC IPC(8): C09K5/00C09K5/04
CPCC09K5/045C09K2205/102C09K2205/104C09K2205/132C09K2205/11C09K2205/112C09K2205/108C09K5/00C09K5/04
Inventor MINOR, BARBARA HAVILAND
Owner EI DU PONT DE NEMOURS & CO
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