Use of Energy Saving Equipment & Technologies in Ammonia refrigeration Applications using

• 100% EOU Fish freezing plant with a capacity of freezing 7 tons of fish per day, consisting of two systems 100 TR each capacity instead of conventional 125 TR each.

• Resultant initial saving on capital equipment of approx Rupees 70,000/- and a recurrent annual savings of over 26 lacs.

• Technical description:
  • Each system uses five plate freezers, two 12 cylinder two stage reciprocating compressors driven by energy efficient electric motors of 132 KW. Plant incorporates evaporative condensers with S.S. tubing and specially designed low temperature -40°C factory manufactured package consisting of Low Pressure vessel with hermetic ammonia circulation pump sets; automatic capacity modulation control technology and hot gas defrost system.

• Extraordinary features of the system:

  • 100 TR plant design for 5 freezers instead of 125 TR others provide (5x25=125TR)
  • Specially designed high efficiency oil separators with S.S. demister pads instead compressor manufacturer's standard accessory.
  • Use of two stage reciprocating compressors with open flash inter-stage cooler instead of screw-compressors. After detailed study and obtaining quotations from leading manufacturers like Frick USA, Mycom Japan, J.&E. Hall UK, it was found screw compressors consume more power at full load. Also reciprocating compressors provided with cylinder unloading arrangement responding to suction pressure variation due to reduction in load gives better part load saving compared to screw compressors having slide value control.