TY - GEN
T1 - Design and analysis of the absorber component in waste-heat-driven diffusion absorption refrigeration systems
AU - Rattner, Alexander S.
AU - Garimella, Srinivas
PY - 2012
Y1 - 2012
N2 - The diffusion absorption refrigeration (DAR) cycle can provide refrigeration in remote locations using waste-heat or other low-grade-thermal input. Unlike conventional absorption systems, the DAR cycle receives no mechanical input, so all flows must be driven by passive mechanisms. Further, a third inert gas is employed to allow refrigerant expansion since conventional throttling devices impart large pressure drops. Thus, DAR absorber design is challenging due to increased mass transfer resistance from the inert gas, multiple outlet flow paths for the inert gas and solution, and limited (passive) external cooling. In the present study, a detailed, coupled heat and mass transfer model is developed for a counter-flow serpentine-tube DAR absorber. The model is applied to the analysis of an absorber for a small-scale refrigeration system with a 36 W cooling capacity. Studies are conducted to investigate the effect of key configuration and operational parameters on absorber performance, and guidelines are provided for component and system design.
AB - The diffusion absorption refrigeration (DAR) cycle can provide refrigeration in remote locations using waste-heat or other low-grade-thermal input. Unlike conventional absorption systems, the DAR cycle receives no mechanical input, so all flows must be driven by passive mechanisms. Further, a third inert gas is employed to allow refrigerant expansion since conventional throttling devices impart large pressure drops. Thus, DAR absorber design is challenging due to increased mass transfer resistance from the inert gas, multiple outlet flow paths for the inert gas and solution, and limited (passive) external cooling. In the present study, a detailed, coupled heat and mass transfer model is developed for a counter-flow serpentine-tube DAR absorber. The model is applied to the analysis of an absorber for a small-scale refrigeration system with a 36 W cooling capacity. Studies are conducted to investigate the effect of key configuration and operational parameters on absorber performance, and guidelines are provided for component and system design.
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U2 - 10.1115/HT2012-58608
DO - 10.1115/HT2012-58608
M3 - Conference contribution
AN - SCOPUS:84892661545
SN - 9780791844779
T3 - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
SP - 459
EP - 474
BT - ASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
T2 - ASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
Y2 - 8 July 2012 through 12 July 2012
ER -