Evaluation of the thermodynamic effectiveness of a plate heat exchanger integrated into an experimental single stage heat transformer operating with Water/Carrol mixture

Performance of Different Experimental Absorber Designs in Absorption Heat Pump Cycle Technologies: A Review

“…The absorption process delivers useful heat (Q AB ) at a higher temperature (T AB ). Finally, the diluted salt solution returns to the generator, to preheat the concentrated salt solution in a heat exchanger, called "economizer", before restarting the cycle again [46]. The useful heat produced by an AHT can be used for heat energy revalorization in industrial processes [47] and water purification [48][49][50].…”

Recycling waste heat energy using vapour absorption heat transformers: A review

“…Increasing the evaporator and generator temperatures or else decreasing the condensation temperature is shown to increase this critical absorber temperature [19]. A similar increase may be achieved by increasing the effectiveness of the solution heat exchanger [20].…”

“…The Carrol mixture is simply a mixture of LiBr and ethylene glycol (½CH 2 OH 2 ) in the proportion 1:4.5 [61]. It is claimed that using the waterCarrol mixture retains the same thermodynamic properties as the LiBr-H 2 O solution, while increasing solubility and allowing salt mass fractions of up to 0.8 to be achieved prior to crystallisation [20]. There is no real difference in their corrosivity, however the water-Carrol mixture does have a higher viscosity [86].…”

“…The lithium bromide and water (LiBr-H 2 O) working fluid combination is the only working fluid combination in current commercial use [20]. This is due to a number of advantages such as water's high enthalpy of evaporation, good heat and mass transfer capabilities, low toxicity and the fact that no rectifying apparatus is required in the cycle as LiBr is non-volatile [6].…”

Environmental Impact Assessment for an Absorption Heat Transformer

“…As a very effective device, the AHT can be applied to improve low-grade waste heat with temperatures ranging from 60˚C to 100˚C. The AHT system can effectively recover about 50% of this waste heat and give an opportunity to reuse it in industrial processes [5] The European Commission presented the Life Cycle Assessment (LCA) as an important framework for evaluating the environmental impact of products, processes or systems [6].…”