HFC/HC blend for car climate control with mineral oil as lubricant
Polyalkaline glycol is used as the lubricant with R134a in automobile air conditioning systems and it is well known that PAG oil is highly hygroscopic in nature. Presence of moisture in the system may detoriate the system and its performance. Hence PAG oil is replaced with conventional mineral oil....
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| Veröffentlicht in: | Thermal science 2011, Vol.15 (suppl. 2), p.391-398 |
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| container_title | Thermal science |
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| creator | Ravikumar, T.S. Lal, Mohan |
| description | Polyalkaline glycol is used as the lubricant with R134a in automobile air
conditioning systems and it is well known that PAG oil is highly hygroscopic
in nature. Presence of moisture in the system may detoriate the system and
its performance. Hence PAG oil is replaced with conventional mineral oil. In
the present study, a new refrigerant blend R134a/R290/R600a with mineral oil
as lubricant has been tested in an experimental test rig with R12 as base
line and compared with the published results. Pull down test from an average
cabin temperature of 50?C is performed while the compressor speed is varied
successively from 1500-2250-3000-800 rpm with a constant heat load of 2500 W,
and held at that speed for duration of 30 minutes. Both R12 and the HFC-HC
blend is tested in an experimental test rig and it has been found that this
new mixture is almost in par with R12, However, a slight loss in system
performance is encountered. But, considering the service issues associated
with R134a and PAG oil, this new mixture can have better performance than
R134a and PAG combination.
nema |
| doi_str_mv | 10.2298/TSCI100703028R |
| format | Article |
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conditioning systems and it is well known that PAG oil is highly hygroscopic
in nature. Presence of moisture in the system may detoriate the system and
its performance. Hence PAG oil is replaced with conventional mineral oil. In
the present study, a new refrigerant blend R134a/R290/R600a with mineral oil
as lubricant has been tested in an experimental test rig with R12 as base
line and compared with the published results. Pull down test from an average
cabin temperature of 50?C is performed while the compressor speed is varied
successively from 1500-2250-3000-800 rpm with a constant heat load of 2500 W,
and held at that speed for duration of 30 minutes. Both R12 and the HFC-HC
blend is tested in an experimental test rig and it has been found that this
new mixture is almost in par with R12, However, a slight loss in system
performance is encountered. But, considering the service issues associated
with R134a and PAG oil, this new mixture can have better performance than
R134a and PAG combination.
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conditioning systems and it is well known that PAG oil is highly hygroscopic
in nature. Presence of moisture in the system may detoriate the system and
its performance. Hence PAG oil is replaced with conventional mineral oil. In
the present study, a new refrigerant blend R134a/R290/R600a with mineral oil
as lubricant has been tested in an experimental test rig with R12 as base
line and compared with the published results. Pull down test from an average
cabin temperature of 50?C is performed while the compressor speed is varied
successively from 1500-2250-3000-800 rpm with a constant heat load of 2500 W,
and held at that speed for duration of 30 minutes. Both R12 and the HFC-HC
blend is tested in an experimental test rig and it has been found that this
new mixture is almost in par with R12, However, a slight loss in system
performance is encountered. But, considering the service issues associated
with R134a and PAG oil, this new mixture can have better performance than
R134a and PAG combination.
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conditioning systems and it is well known that PAG oil is highly hygroscopic
in nature. Presence of moisture in the system may detoriate the system and
its performance. Hence PAG oil is replaced with conventional mineral oil. In
the present study, a new refrigerant blend R134a/R290/R600a with mineral oil
as lubricant has been tested in an experimental test rig with R12 as base
line and compared with the published results. Pull down test from an average
cabin temperature of 50?C is performed while the compressor speed is varied
successively from 1500-2250-3000-800 rpm with a constant heat load of 2500 W,
and held at that speed for duration of 30 minutes. Both R12 and the HFC-HC
blend is tested in an experimental test rig and it has been found that this
new mixture is almost in par with R12, However, a slight loss in system
performance is encountered. But, considering the service issues associated
with R134a and PAG oil, this new mixture can have better performance than
R134a and PAG combination.
nema</abstract><cop>Belgrade</cop><pub>Society of Thermal Engineers of Serbia</pub><doi>10.2298/TSCI100703028R</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
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| ispartof | Thermal science, 2011, Vol.15 (suppl. 2), p.391-398 |
| issn | 0354-9836 2334-7163 |
| language | eng |
| recordid | cdi_proquest_journals_2429870086 |
| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Free Full-Text Journals in Chemistry |
| subjects | Air conditioning Hydrofluorocarbons Lubricants Mineral oils |
| title | HFC/HC blend for car climate control with mineral oil as lubricant |
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