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Heat exchange compositions and methods
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A technology of composition and heat exchange fluid, which is applied in the field of refrigerant composition of refrigerant HFC-404A and the renovation of low-temperature refrigerant system, which can solve problems such as inability to use and achieve high efficiency.
Active Publication Date: 2016-11-30
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
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Embodiment 1
[0034] Embodiment 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, the term expresses the ratio of useful refrigeration to the energy applied by a compressor when compressing a vapor. The capacity of the refrigerant indicates the amount of cooling or heating provided by the refrigerant and provides some measure of the compressor's ability to pump heat for a given volume flow of refrigerant. In other words, a refrigerant with a higher capacity will deliver more cooling or heating power given a particular compressor. One method of assessing the COP of a refrigerant under specific operating conditions is based on thermodynamic performance using standard refrigeration cycle analysis tech...
Embodiment 2
[0041] Example 2: Retrofit parameters
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Abstract
Compositions, methods, and systems are disclosed that include or utilize a multi-component mixture comprising: (a) from about 10% to about 35% by weight HFC-32; (b) from about 10% to about 35% by weight % 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, wherein the weight percentages are based on the total amount of components (a)-(e) in the composition.
Description
[0001] related application [0002] This application is related to and claims priority to the following applications: U.S. Provisional Application Serial No. 61 / 176,773 filed May 8, 2009, 61 / 240,786 filed September 9, 2009, 61 filed 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 incorporated herein by reference in its entirety. technical field [0003] The present invention relates to compositions, methods and systems particularly useful in cryogenic refrigeration applications, and in particular to refrigerant compositions for replacing the refrigerant HFC-404A used in heating and cooling applications, and to cryogenic refrigerant systems Retrofits, including retrofitting of systems designed to use HFC-404A. Background technique [0004] Mechanical refrigeration systems using refrigerant fluids, and associated heat exchange devices, such as heat pumps and air conditioners, are known in the art ...
Claims
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Application Information
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