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r22, a traditional refrigerant used in domestic air conditioners, is one of the few remaining ozone-depleting substances and the powerful greenhouse gas, which will be phased out under the montreal protocol. consumptions of r22 in air conditioning industry in china are required to be phased out by 2030. as the biggest domestic air conditioner producer, consumer and exporter, china is hit by the impact and challenge of replacing r22. the search for alternatives of r22 has become the top priority.
after extensive research of feasible alternative technologies and careful selections, hc-290 is finally singled out as the substitute of r22 for its near-zero ozone depletion potential (odp) and global warming potential (gwp). r290 features significant performance of increased heat exchange rate, improved system energy efficiency and reduced heat exchanger pipe size and system costs. r290 are less costly with better material compatibility and less refrigerant charge.
now air conditioners using r290 have come into the market in quite a slow progress. experts believe that logistics and installations are the major restrictions of commercial applications of r290 air conditioners. it is required that only well-trained personnel can perform the installation, maintenance and service of r290 air conditioners. but the reality is that the maintenance industry is in disorder. there is still a long way to go with r290 in commercial refrigeration and air conditioning.