TY - JOUR
TI - HFC/HC blend for car climate control with mineral oil as lubricant
AU - Ravikumar Thirupandiyur Selvanambi
AU - Lal Dhasan Mohan
JN - Thermal Science
PY - 2011
VL - 15
IS - 12
SP - 391
EP - 398
PT - Article
AB - 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.