Système frigorifique à diffusion-absorption à faible source de température Partie I: Modélisation et analyse de cycle

Translated title of the contribution: Low-source-temperature diffusion absorption refrigeration. Part I: Modeling and cycle analysis

Alexander S. Rattner, Srinivas Garimella

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The diffusion absorption refrigeration (DAR) cycle offers a potentially fully thermally activated cooling technology. However, most implementations operate with high source temperatures, forced liquid cooling, or elevated evaporator temperatures (≳5°C). Additionally, few component design resources are available in the literature. In Part I of this investigation, a fully passive DAR design is proposed. Reduced temperature operation is enabled with alternate working fluids (NH3-NaSCN-He), a distributed heated bubble-pump generator (BPG), and an enhanced absorber. Detailed models are formulated for the BPG, condenser, evaporator, absorber, and gas circulation loop. These are integrated to yield an overall system model. System behavior is evaluated over a range of operating conditions. With the necessary and reasonably expected component performances, refrigeration COPs of 0.11–0.26 can be achieved at design conditions (Tamb = 24 °C) with low source temperatures (110–130 °C) and passive air cooling. In the accompanying paper (Part II), this refrigeration system is experimentally demonstrated, and the proposed models are evaluated.

Original languageFrench
Pages (from-to)287-311
Number of pages25
JournalInternational Journal of Refrigeration
Volume65
DOIs
StatePublished - May 1 2016

Fingerprint

Absorption refrigeration
Evaporators
Refrigeration
Cooling
Pumps
Temperature
Fluids
Liquids
Air
Gases

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

Cite this

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abstract = "The diffusion absorption refrigeration (DAR) cycle offers a potentially fully thermally activated cooling technology. However, most implementations operate with high source temperatures, forced liquid cooling, or elevated evaporator temperatures (≳5°C). Additionally, few component design resources are available in the literature. In Part I of this investigation, a fully passive DAR design is proposed. Reduced temperature operation is enabled with alternate working fluids (NH3-NaSCN-He), a distributed heated bubble-pump generator (BPG), and an enhanced absorber. Detailed models are formulated for the BPG, condenser, evaporator, absorber, and gas circulation loop. These are integrated to yield an overall system model. System behavior is evaluated over a range of operating conditions. With the necessary and reasonably expected component performances, refrigeration COPs of 0.11–0.26 can be achieved at design conditions (Tamb = 24 °C) with low source temperatures (110–130 °C) and passive air cooling. In the accompanying paper (Part II), this refrigeration system is experimentally demonstrated, and the proposed models are evaluated.",
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N2 - The diffusion absorption refrigeration (DAR) cycle offers a potentially fully thermally activated cooling technology. However, most implementations operate with high source temperatures, forced liquid cooling, or elevated evaporator temperatures (≳5°C). Additionally, few component design resources are available in the literature. In Part I of this investigation, a fully passive DAR design is proposed. Reduced temperature operation is enabled with alternate working fluids (NH3-NaSCN-He), a distributed heated bubble-pump generator (BPG), and an enhanced absorber. Detailed models are formulated for the BPG, condenser, evaporator, absorber, and gas circulation loop. These are integrated to yield an overall system model. System behavior is evaluated over a range of operating conditions. With the necessary and reasonably expected component performances, refrigeration COPs of 0.11–0.26 can be achieved at design conditions (Tamb = 24 °C) with low source temperatures (110–130 °C) and passive air cooling. In the accompanying paper (Part II), this refrigeration system is experimentally demonstrated, and the proposed models are evaluated.

AB - The diffusion absorption refrigeration (DAR) cycle offers a potentially fully thermally activated cooling technology. However, most implementations operate with high source temperatures, forced liquid cooling, or elevated evaporator temperatures (≳5°C). Additionally, few component design resources are available in the literature. In Part I of this investigation, a fully passive DAR design is proposed. Reduced temperature operation is enabled with alternate working fluids (NH3-NaSCN-He), a distributed heated bubble-pump generator (BPG), and an enhanced absorber. Detailed models are formulated for the BPG, condenser, evaporator, absorber, and gas circulation loop. These are integrated to yield an overall system model. System behavior is evaluated over a range of operating conditions. With the necessary and reasonably expected component performances, refrigeration COPs of 0.11–0.26 can be achieved at design conditions (Tamb = 24 °C) with low source temperatures (110–130 °C) and passive air cooling. In the accompanying paper (Part II), this refrigeration system is experimentally demonstrated, and the proposed models are evaluated.

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