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A technology of composition and heat exchange fluid, applied in chemical instruments and methods, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as unusable and achieve high efficiency
Active Publication Date: 2012-11-28
HONEYWELL INT INC
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Problems solved by technology
For example, the fluoroalkane difluoroethane (HFC-152a) and the fluoroalkene 1,1,1-trifluoropropene (HFO-1243zf) are both flammable and therefore cannot be used in many applications
Method used
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Embodiment 1
[0034] Example 1: Performance Parameters
[0035] The coefficient of performance (COP) is a widely accepted measure of refrigerant performance and is particularly useful for describing the relative thermodynamic efficiency of a refrigerant in a particular heating or cooling cycle involving refrigerant evaporation or condensation. In refrigeration engineering, this term refers to the ratio of useful refrigeration to the energy applied by a compressor when compressing vapour. The capacity of the refrigerant represents the amount of cooling or heating provided by the refrigerant, and provides some measure of the ability of the compressor to pump heat for a given volumetric flow of refrigerant. In other words, given a particular compressor, a refrigerant with a higher capacity will deliver more cooling or heating power. One method of assessing the COP of a refrigerant under specific operating conditions is based on the thermodynamic properties using standard refrigeration cycle a...
Embodiment 2
[0041] Example 2: Refurbishment parameters
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Abstract
Compositions, methods and systems which comprise or utilize a multi-component mixture comprising: (a) from about 10% to about 35% by weight of HFC-32; (b) from about 10% to about 35% by weight of HFC-125; (c) from about 20% to about 50% by weight of HFO- 1234ze, HFO- 1234yf and combinations of these; (d) from about 15% to about 35% by weight of HFC-134a; and optionally (e) up to about 10% by weight of CF3I and up to about 5% by weight of HFCO-1233ze, with the weight percent being based on the total of the components (a) - (e) in the composition.
Description
[0001] Related applications [0002] This application relates to and claims priority to: US Provisional Application Serial Nos. 61 / 176,773, filed May 8, 2009, 61 / 240,786, September 9, 2009, 61, October 1, 2009 / 247,816, 61 / 329,955, filed April 30, 2010, and US Application 12 / 511,954, filed July 29, 2009, each of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to compositions, methods and systems particularly useful in low temperature refrigeration applications, and in particular to refrigerant compositions for replacing the refrigerant HFC-404A used in heating and cooling applications, and to low temperature refrigerant systems Retrofit, including retrofit of systems designed to use HFC-404A. Background technique [0004] Mechanical refrigeration systems using refrigerant liquids, and related heat exchange devices, such as heat pumps and air conditioners, are known in the art for industrial, commercial and do...
Claims
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Application Information
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