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Waste heat driven absorption/vapor-compression cascade refrigeration system for megawatt scale, high-flux, low-temperature cooling.

Author(s) : GARIMELLA S., BROWN A. M., NAGAVARAPU A. K.

Type of article: Article, IJR article

Summary

A novel cascaded absorption/vapor-compression cycle with a high temperature lift for a naval ship application was conceptualized and analyzed. A single-effect LiBr-H2O absorption cycle and a subcritical CO2 vapor-compression cycle were coupled together to provide low-temperature refrigerant (-40°C) for high heat flux electronics applications, medium-temperature refrigerant (5°C) for space conditioning and other low heat flux applications, and as an auxiliary benefit, provide medium-temperature heat rejection (about 48°C) for water heating applications. A thermodynamic model was developed to analyze the performance of the cascaded system, and parametric analyses were conducted to estimate the performance of the system over a range of operating conditions. The performance of the cascaded system was also compared with an equivalent two-stage vapor-compression cycle. This cycle was found to exhibit very high COPs over a wide range of operating conditions and when compared to an equivalent vapor-compression system, was found to avoid up to 31% electricity demand.

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Pages: 1776-1785

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Details

  • Original title: Waste heat driven absorption/vapor-compression cascade refrigeration system for megawatt scale, high-flux, low-temperature cooling.
  • Record ID : 30002250
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 34 - n. 8
  • Publication date: 2011/12

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