Refrigerants - Revision history

Ranisha at 07:11, 18 June 2015

2015-06-18T07:11:54Z

Ranisha: /* Climate and environmental Impact */

2015-06-18T06:49:50Z

‎Climate and environmental Impact

Daniel Brenner at 10:49, 16 June 2015

2015-06-16T10:49:34Z

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Daniel Brenner at 10:14, 16 June 2015

2015-06-16T10:14:49Z

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Daniel Brenner at 10:13, 16 June 2015

2015-06-16T10:13:11Z

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Daniel Brenner at 10:11, 16 June 2015

2015-06-16T10:11:39Z

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Daniel Brenner at 10:05, 16 June 2015

2015-06-16T10:05:20Z

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Daniel Brenner at 10:04, 16 June 2015

2015-06-16T10:04:18Z

Daniel Brenner: Created page with " Refrigerants are substances that can be used in the refrigeration cycle of air conditioning and refrigeration equipment because of their thermodynamic properties. Chlorofluo..."

2015-06-16T09:58:16Z

Created page with " Refrigerants are substances that can be used in the refrigeration cycle of air conditioning and refrigeration equipment because of their thermodynamic properties. Chlorofluo..."

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Refrigerants are substances that can be used in the refrigeration cycle of air conditioning and refrigeration equipment because of their thermodynamic properties.

Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) are synthetic substances used as refrigerants. These halogenated refrigerants have to be chemically synthesized as they either do not occur in nature at all or only in trace concentrations. CFCs and HCFCs are being phased out under the Montreal Protocol, an international agreement to protect the ozone layer. They have been controlled by the Montreal Protocol since 1987 because of their ozone depleting potential and high global warming potentials.

{| class="contenttable contenttable-0 autoWidth narrowFirstColumn"
|+ Different groups of refrigerants and their ozone depletion and global warming potentials
|- class="tr-even tr-0"
! id="col162-0" scope="col" class="td-0" | Substance group
! id="col162-1" scope="col" class="td-1" | Abbreviation
! id="col162-2" scope="col" class="td-2" | ODP
! id="col162-3" scope="col" class="td-3" | GWP
! id="col162-4" scope="col" class="td-last td-4" | Example<br/>(refrigerant/foam blowing agent)
|- class="tr-odd tr-1"
| headers="col162-0" class="td-0" | Saturated chlorofluorocarbons
| headers="col162-1" class="td-1" | CFC
| headers="col162-2" class="td-2" | 0.6-1
| headers="col162-3" class="td-3" | 4750-14,400
| headers="col162-4" class="td-last td-4" | R11, R12
|- class="tr-even tr-2"
| headers="col162-0" class="td-0" | Saturated hydrochlorofluorocarbons
| headers="col162-1" class="td-1" | HCFC
| headers="col162-2" class="td-2" | 0.02-0.11
| headers="col162-3" class="td-3" | 77-2310
| headers="col162-4" class="td-last td-4" | R22, R141b
|- class="tr-odd tr-3"
| headers="col162-0" class="td-0" | Saturated hydrofluorocarbons
| headers="col162-1" class="td-1" | HFC
| headers="col162-2" class="td-2" | -
| headers="col162-3" class="td-3" | 124-14,800
| headers="col162-4" class="td-last td-4" | R32, R134a
|- class="tr-even tr-4"
| headers="col162-0" class="td-0" | Unsaturated hydrochlorofluorcarbons
| headers="col162-1" class="td-1" | u-HCFC
| headers="col162-2" class="td-2" | <0.001
| headers="col162-3" class="td-3" | 0-10
| headers="col162-4" class="td-last td-4" | R1233zd
|- class="tr-odd tr-5"
| headers="col162-0" class="td-0" | Unsaturated hydrofluorocarbons
| headers="col162-1" class="td-1" | u-HFC
| headers="col162-2" class="td-2" | -
| headers="col162-3" class="td-3" | <1-12
| headers="col162-4" class="td-last td-4" | R1234yf, R1234ze, R1234yz
|- class="tr-even tr-last"
| headers="col162-0" class="td-0" | Natural refrigerants
| headers="col162-1" class="td-1" |  
| headers="col162-2" class="td-2" | -
| headers="col162-3" class="td-3" | 0-3
| headers="col162-4" class="td-last td-4" | R744 (carbon dioxide)<br/>R717 (ammonia)<br/>R290 (propane)
|}

@@ Line 1: / Line 1: @@
-Refrigerants are substances that can be used in the [[Cooling|cooling]] cycle of air conditioning and refrigeration equipment because of their thermodynamic properties.<br/>
+Refrigerants are substances that can be used in the [[Cooling|cooling]]&nbsp;cycle of air conditioning and refrigeration equipment because of their thermodynamic properties.
-−
 = Climate and environmental Impact<br/> =
@@ Line 52: / Line 51: @@
 | headers="col162-4" class="td-last td-4" style="width: 180px;" | R744 (carbon dioxide)<br/>R717 (ammonia)<br/>R290 (propane)
 |}
 Consumption of HFCs however is growing dramatically world-wide due to their function as replacement substances for CFCs and HCFCs. Nevertheless HFCs are greenhouse gases. Their use should be avoided in order to slow global warming.<br/>Unsaturated HFCs (u-HFCs, also marketed as hydrofluoroolefins, or “HFOs”) are synthetically made HFCs with no ODP and low GWP that have been developed specifically to fulfil regulations that prohibit HFCs with higher GWP (e.g., above 150). Some are slightly flammable and combustion can form hydrogen fluoride. In the atmosphere their decomposition leads to the formation of trifluoroacetic acid (TFA), which is a strong acid with toxicity to some organisms. There is no known degradation mechanism for TFA.<br/>
@@ Line 57: / Line 58: @@
 Natural refrigerants are climate friendly. They have a very low or zero global warming potential and zero ozone depletion potential; they are part of the natural biogeochemical cycles and do not form persistent wastes in the atmosphere, water or biosphere. Natural refrigerants are the naturally occurring substances CO<sub>2</sub>, ammonia, water, air and hydrocarbons such as propane, isobutene and propene/propylene. Their production is not energy intensive as even the hydrocarbons can be obtained without chemical transformation by separation. Natural refrigerants are widely used in some RAC applications, for example isobutane in domestic refrigerators and ammonia in large cooling processes. Natural refrigerants are relatively cheap because they are mass produced for a wide range of uses and are readily available if distribution structures are present. Natural refrigerants can often be sourced as by-products from other processes. Recycling or disposal after use in cooling systems is easier than with CFCs, HCFCs and HFCs.<br/>
 = Safety =
@@ Line 62: / Line 64: @@
 All natural refrigerants have characteristics that require additional safety measures, compared to conventional CFCs, HCFCs and HFCs<ref>http://www.green-cooling-initiative.org/technology/overview/refrigerants/</ref>. Hydrocarbons (HCs) are flammable and ammonia is flammable, corrosive and of higher toxicity. Simple measures such as the use of appropriate materials, the selection of safe components and technician training can offset these undesirable characteristics. The following table gives a summary of refrigerant safety groups.<br/>
-{| class="contenttable contenttable-0 autoWidth"
+{| class="contenttable contenttable-0 autoWidth" style="width: 750px;"
 |+ Refrigerant safety groups after ISO817:2009 and EN378-1:2008<ref>http://www.green-cooling-initiative.org/technology/overview/refrigerants/</ref><br/>
 |- class="tr-even tr-0"
-! class="td-0" scope="col" id="col163-0" | &nbsp;
+! class="td-0" scope="col" id="col163-0" style="width: 150px;" | &nbsp;
-! class="td-1" scope="col" id="col163-1" | Lower toxicity
+! class="td-1" scope="col" id="col163-1" style="width: 306px;" | Lower toxicity
-! class="td-last td-2" scope="col" id="col163-2" | Higher toxicity
+! class="td-last td-2" scope="col" id="col163-2" style="width: 272px;" | Higher toxicity
 |- class="tr-odd tr-1"
-| class="td-0" headers="col163-0" | No flame propagation
+| class="td-0" headers="col163-0" style="width: 150px;" | No flame propagation
-| class="td-1" headers="col163-1" | A1, e.g.: CFC-11, R404a, HFC-134a, R410a
+| class="td-1" headers="col163-1" style="width: 306px;" | A1, e.g.: CFC-11, R404a, HFC-134a, R410a
-| class="td-last td-2" headers="col163-2" | B1, e.g.: HCFC-123
+| class="td-last td-2" headers="col163-2" style="width: 272px;" | B1, e.g.: HCFC-123
 |- class="tr-even tr-2"
-| class="td-0" headers="col163-0" | Lower flammability
+| class="td-0" headers="col163-0" style="width: 150px;" | Lower flammability
-| class="td-1" headers="col163-1" | A2, e.g.: u-HFC-1234yf, HFC-152
+| class="td-1" headers="col163-1" style="width: 306px;" | A2, e.g.: u-HFC-1234yf, HFC-152
-| class="td-last td-2" headers="col163-2" | B2, e.g.: Methyl formate, R717 (ammonia)
+| class="td-last td-2" headers="col163-2" style="width: 272px;" | B2, e.g.: Methyl formate, R717 (ammonia)
 |- class="tr-odd tr-last"
-| class="td-0" headers="col163-0" | Higher flammability
+| class="td-0" headers="col163-0" style="width: 150px;" | Higher flammability
-| class="td-1" headers="col163-1" | A3, e.g.: hydrocarbons, R430a, R510a
+| class="td-1" headers="col163-1" style="width: 306px;" | A3, e.g.: hydrocarbons, R430a, R510a
-| class="td-last td-2" headers="col163-2" | B3<br/>
+| class="td-last td-2" headers="col163-2" style="width: 272px;" | B3<br/>
 |}
-= One step ahead: Leapfrogging to [[Green Cooling Initiative|green cooling]] technologies =
+= One step ahead: Leapfrogging to green cooling technologies =
 <div class="csc-textpic-text">
 The growing use of HFCs in the RAC sectors can be clearly linked to the phase-out of CFCs and HCFCs in these industries, a fact that was specifically noted by the Rio+20 declaration in 2012 and other high level political declarations, such as by the Climate and Clean Air Coalition (CCAC).
@@ Line 96: / Line 98: @@
 <references /><br/>
 [[Category:Climate_Change_Mitigation]]

@@ Line 1: / Line 1: @@
 Refrigerants are substances that can be used in the [[Cooling|cooling]] cycle of air conditioning and refrigeration equipment because of their thermodynamic properties.<br/>
 = Climate and environmental Impact<br/> =
@@ Line 6: / Line 7: @@
 Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) are synthetic substances used as refrigerants. These halogenated refrigerants have to be chemically synthesized as they either do not occur in nature at all or only in trace concentrations. CFCs and HCFCs are being phased out under the Montreal Protocol, an international agreement to protect the ozone layer. They have been controlled by the Montreal Protocol since 1987 because of their ozone depleting potential and high global warming potentials.
-{| class="contenttable contenttable-0 autoWidth narrowFirstColumn"
+{| style="width: 732px;"
-|+ Different groups of refrigerants and their ozone depletion and global warming potentials<br/>
+|+ Different groups of refrigerants and their ozone depletion and global warming potentials
-|- class="tr-even tr-0"
+|-
-! id="col162-0" scope="col" class="td-0" | Substance group
+! style="width: 243px;" | Substance group
-! id="col162-1" scope="col" class="td-1" | Abbreviation
+! style="width: 85px;" | Abbreviation
-! id="col162-2" scope="col" class="td-2" | ODP
+! style="width: 72px;" | ODP
-! id="col162-3" scope="col" class="td-3" | GWP<ref>http://www.ipcc.ch/report/ar5/wg1/</ref>
+! style="width: 118px;" | GWP<ref>http://www.ipcc.ch/report/ar5/wg1/</ref>
-! id="col162-4" scope="col" class="td-last td-4" | Example<br/>(refrigerant/foam blowing agent)
+! style="width: 180px;" | Example<br/>(refrigerant/ foam blowing agent)
 |- class="tr-odd tr-1"
-| headers="col162-0" class="td-0" | Saturated chlorofluorocarbons
+| style="width: 243px;" | Saturated chlorofluorocarbons
-| headers="col162-1" class="td-1" | CFC
+| style="width: 85px;" | CFC
-| headers="col162-2" class="td-2" | 0.6-1
+| style="width: 72px;" | 0.6-1
-| headers="col162-3" class="td-3" | 4660-13,900
+| style="width: 118px;" | 4660-13,900
-| headers="col162-4" class="td-last td-4" | R11, R12
+| style="width: 180px;" | R11, R12
-|- class="tr-even tr-2"
+|-
-| headers="col162-0" class="td-0" | Saturated hydrochlorofluorocarbons
+| style="width: 243px;" | Saturated hydrochlorofluorocarbons
-| headers="col162-1" class="td-1" | HCFC
+| style="width: 85px;" | HCFC
-| headers="col162-2" class="td-2" | 0.02-0.11
+| style="width: 72px;" | 0.02-0.11
-| headers="col162-3" class="td-3" | 59-1980
+| style="width: 118px;" | 59-1980
-| headers="col162-4" class="td-last td-4" | R22, R141b
+| style="width: 180px;" | R22, R141b
-|- class="tr-odd tr-3"
+|-
-| headers="col162-0" class="td-0" | Saturated hydrofluorocarbons
+| style="width: 243px;" | Saturated hydrofluorocarbons
-| headers="col162-1" class="td-1" | HFC
+| style="width: 85px;" | HFC
-| headers="col162-2" class="td-2" | -
+| style="width: 72px;" | -
-| headers="col162-3" class="td-3" | 6-12,400
+| headers="col162-3" class="td-3" style="width: 118px;" | 6-12,400
-| headers="col162-4" class="td-last td-4" | R32, R134a
+| headers="col162-4" class="td-last td-4" style="width: 180px;" | R32, R134a
 |- class="tr-even tr-4"
-| headers="col162-0" class="td-0" | Unsaturated hydrochlorofluorcarbons
+| headers="col162-0" class="td-0" style="width: 243px;" | Unsaturated hydrochlorofluorcarbons
-| headers="col162-1" class="td-1" | u-HCFC
+| headers="col162-1" class="td-1" style="width: 85px;" | u-HCFC
-| headers="col162-2" class="td-2" | <0.001
+| headers="col162-2" class="td-2" style="width: 72px;" | <0.001
-| headers="col162-3" class="td-3" | 0-10
+| headers="col162-3" class="td-3" style="width: 118px;" | 0-10
-| headers="col162-4" class="td-last td-4" | R1233zd
+| headers="col162-4" class="td-last td-4" style="width: 180px;" | R1233zd
 |- class="tr-odd tr-5"
-| headers="col162-0" class="td-0" | Unsaturated hydrofluorocarbons
+| headers="col162-0" class="td-0" style="width: 243px;" | Unsaturated hydrofluorocarbons
-| headers="col162-1" class="td-1" | u-HFC
+| headers="col162-1" class="td-1" style="width: 85px;" | u-HFC
-| headers="col162-2" class="td-2" | -
+| headers="col162-2" class="td-2" style="width: 72px;" | -
-| headers="col162-3" class="td-3" | <1-2
+| headers="col162-3" class="td-3" style="width: 118px;" | <1-2
-| headers="col162-4" class="td-last td-4" | R1234yf, R1234ze, R1234yz
+| headers="col162-4" class="td-last td-4" style="width: 180px;" | R1234yf, R1234ze, R1234yz
 |- class="tr-even tr-last"
-| headers="col162-0" class="td-0" | Natural refrigerants
+| headers="col162-0" class="td-0" style="width: 243px;" | Natural refrigerants
-| headers="col162-1" class="td-1" | &nbsp;
+| headers="col162-1" class="td-1" style="width: 85px;" | &nbsp;
-| headers="col162-2" class="td-2" | -
+| headers="col162-2" class="td-2" style="width: 72px;" | -
-| headers="col162-3" class="td-3" | 0-3
+| headers="col162-3" class="td-3" style="width: 118px;" | 0-3
-| headers="col162-4" class="td-last td-4" | R744 (carbon dioxide)<br/>R717 (ammonia)<br/>R290 (propane)
+| headers="col162-4" class="td-last td-4" style="width: 180px;" | R744 (carbon dioxide)<br/>R717 (ammonia)<br/>R290 (propane)
 |}
@@ Line 55: / Line 56: @@
 Natural refrigerants are climate friendly. They have a very low or zero global warming potential and zero ozone depletion potential; they are part of the natural biogeochemical cycles and do not form persistent wastes in the atmosphere, water or biosphere. Natural refrigerants are the naturally occurring substances CO<sub>2</sub>, ammonia, water, air and hydrocarbons such as propane, isobutene and propene/propylene. Their production is not energy intensive as even the hydrocarbons can be obtained without chemical transformation by separation. Natural refrigerants are widely used in some RAC applications, for example isobutane in domestic refrigerators and ammonia in large cooling processes. Natural refrigerants are relatively cheap because they are mass produced for a wide range of uses and are readily available if distribution structures are present. Natural refrigerants can often be sourced as by-products from other processes. Recycling or disposal after use in cooling systems is easier than with CFCs, HCFCs and HFCs.<br/>
 = Safety =