Thermodynamic studies on HFC134a-DMA double effect and cascaded absorption refrigeration systems

An investigation on the absorption-compression hybrid refrigeration cycle driven by gases and power from vehicle engines

“…The refrigerants are hydrochlorofluorocarbons (HCFCs) or hydrofluorocarbons (HFCs), such as R22, R124, R134a, and so on, and the absorbents are chemical solvents, such as dimethylacetamide (DMAC), dimethylformamide, dimethylether tetraethyleneglycol, and so on. Research on organic working fluids used in ARSs has been performed by many scholars . In accordance with the technical requirements of WHRS for automobiles, the R124 (2‐chloro‐l,l,l,2,‐tetrafluoroethane)–DMAC ( N ′, N ′‐dimethylacetamide) organic working pair is thought to be more suitable for use in the ACHRC.…”

Techno‐economic assessment of novel and conventional working fluid mixtures for two‐stage double‐ and triple‐effect absorption refrigeration systems

“…21 Despite these very promising developments, it is clear that investigations considering double-and tripleeffect systems also need to account for organic fluids; however, they are considerably less frequent than single effect ones. 12 Simulation-based works on double-effect cycles with organic fluids include those by Iyer et al 22 who develop correlations for process performance prediction, Jelinek and Borde 23 considering a 100 kW system, Songara et al 24 considering a 1 kW system, Arun et al 25 also considering a 1 kW system, Jelinek et al 26 considering double and triple pressure level cycles without mentioning their capacity, and Tharves Mohideen et al 27 investigating mass transfer phenomena in a 1 kW system. In all these cases, the rectification process is considered ideal, although in practice the internal structure (number of stages) and operation of the rectifiers is non-ideal and affects significantly the performance and economics of the cycles.…”