TY - JOUR
T1 - Low-source-temperature diffusion absorption refrigeration. Part I
T2 - Modeling and cycle analysis
AU - Rattner, Alexander S.
AU - Garimella, Srinivas
N1 - Publisher Copyright:
© 2015 Elsevier Ltd and IIR
PY - 2016/5/1
Y1 - 2016/5/1
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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U2 - 10.1016/j.ijrefrig.2015.10.010
DO - 10.1016/j.ijrefrig.2015.10.010
M3 - Article
AN - SCOPUS:84955583809
SN - 0140-7007
VL - 65
SP - 287
EP - 311
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -