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investment while selecting the compressor,” advises Kannan.
From an engineer’s perspective, he recommends that the
engineer needs to observe the operating parameters like suction
pressure, discharge pressure, suction temperature, discharge
temperature, superheat, subcooling and power consumption.
Feed these parameters to the software to compare the
capacity and the power consumption. He needs to also look at
the possibilities of increasing the capacity by changing these
parameters. He needs to also observe vibration, abnormal noise,
oil level in the compressor sight glass and the net oil pressure to
understand the health of the compressor.
“Proper usage of mounting grommets and providing
discharge / suction loops/vibrobsorbers are necessary to avoid
leakages, reduce sound and vibration from the condensing unit.
The cleanliness of the system plays vital role for the reliability
of the compressor and the system. All the contaminants like air,
moisture and other solid contaminants should be completely
removed from the system during the installation process. Also,
there is a need to ensure that refrigerant piping recommendations
are followed for the proper oil return,” he adds.
How to get the most out of your compressor:
• Application
• Refrigerant
• Capacity required at operating conditions
• Power supply
• Modulation requirements
• Always follow manufacturer’s recommendations.
• Use only authorised refrigerant and oil for the given
compressor.
Source: Emerson
REFERENCES:
1. Airconditioning Systems
2. Contributions from Emerson and Danfoss RACA
Danfoss
Compressor technology has undergone significant developments
in the last hundred years.
www.hvacronline.co.za RACA Journal I August 2020 23