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Solid-fueled ammonia absorption blast freezing.

Number: pap. n. 82

Author(s) : ERICKSON D. C., ANAND G., KYUNG I., et al.

Summary

The design and operation of a blast freezer with a unique absorption refrigeration system is presented. The unit is installed at a seafood processing plant in Homer, Alaska. The blast freezer serves the fish freezing needs of the Cook Inlet commerical fishing fleet. The heart of the blast freezing system is an ammonia absorption refrigeration plant. Thirty-six tons (126.6 kW) of refrigeration is produced at minus 40°C. The refrigeration is transferred to CO2 secondary loop at -35°C. The liquid CO2 is pumped to the blast freezer. The blast freezer coils are defrosted with hot glycol. The ThermoChiller is cooled by an air cooler in the colder months, and by.8°C seawater in the summer. When there is no demand for blast freezing, the ThermoChiller refrigeration is diverted to a flake icemaker system to produce 16 tons of flake ice per day. Both electricity and oil are expensive in Homer. However, coal is readily available and inexpensive. The coal is burned in a boiler to produce 165°C hot water that powers the absorption refrigeration plant. The boilers are designed to have exceptionally clean exhaust gas, with virtually no soot or VOCs. When coal is expensive or not readily available, the boiler can be fired with wood chips, making this a candidate for the world’s first renewableenergy powered blast freezer. The overall integrated system includes the CO2 blast freezer, ice makers, ice storage, coal boilers, and ammonia absorption refrigeration. The absorption refrigeration unit is available in capacities from 35 kW to 700 kW. It can be customized for whatever heat source is available, be it exhaust gas, solid fuel, natural gas, solar thermal, or geothermal. Where water is scarce, an air-cooled version can be provided.

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Pages: 9 p.

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Details

  • Original title: Solid-fueled ammonia absorption blast freezing.
  • Record ID : 30014361
  • Languages: English
  • Source: International sorption heat pump conference (ISHPC2014), College Park, United States, March 31-April 2, 2014.
  • Publication date: 2014/03/02

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