A comparative study of R22–E181 and R134a–E181 working pairs for a compression–absorption system for simultaneous heating and cooling applications

Satapathy, Prasanta Kumar; Gopal, M.; Arora, Ramesh

doi:10.1016/j.jfoodeng.2006.07.014

Cited by 11 publications

(2 citation statements)

References 4 publications

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“…HFCs not only have much lower toxicities than ammonia, but they can also achieve lower chilling temperatures below 0 °C than water. As refrigerants, HFCs, combined with appropriate absorbents, can be exploited as working pairs for the compression/absorption hybrid cycle. , Popular refrigerants such as R134a have some limitations. Recently, many efforts have been made to search for new refrigerants, which should have zero or a low ozone depletion potential, have a low global warming potential, be nonflammable and nontoxic, and have comparable cycle efficiency.…”

Section: Introductionmentioning

confidence: 99%

Working Pair Selection of Compression and Absorption Hybrid Cycles through Predicting the Activity Coefficients of Hydrofluorocarbon + Ionic Liquid Systems by the UNIFAC Model

Zheng

Wú

2012

Ind. Eng. Chem. Res.

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Hydrofluorocarbon (HFC) + ionic liquid (IL) systems can be adopted as working pairs for compression/absorption hybrid cycles. A method of selecting novel working pairs has been proposed in this paper, that the infinite dilution activity coefficients (γ1 ∞) of working pair system need to be obtained, and the UNIFAC model is implemented to predict the activity coefficients of the working pair system. With the help of published experimental vapor–liquid equilibrium (VLE) data of 18 HFC + IL systems, 16 new group interaction parameters for four anion ILs and nine HFCs have been fitted to extend the evaluating and predicting range of HFC + IL systems for developing alternative working pairs. To validate the reliability of the method, the model parameters have been used to calculate the VLE data with the average relative deviations (ARDs) of pressures less than 8.5%. The prediction of the γ1 ∞ shows that the solubility and affinity between HFCs and ILs increase with the decrease of the γ1 ∞, which is in agreement with the experimental results. It is found by the prediction that the combinations of R32/R134 and [Tf2N]-based ILs may be two kinds of potential working pairs to improve the performances of compression/absorption hybrid cycles.

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Section: Introductionmentioning

confidence: 99%

Working Pair Selection of Compression and Absorption Hybrid Cycles through Predicting the Activity Coefficients of Hydrofluorocarbon + Ionic Liquid Systems by the UNIFAC Model

Zheng

Wú

2012

Ind. Eng. Chem. Res.

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“…Thus, the refrigerant vapour temperature coming out of the compressor is calculated as 375 K considering an isentropic efficiency of 80%. The amount of refrigerant vapour quantity is taken as 0:02 kg s À1 so that the strong solution and weak solution concentration difference can be maintained at 0.1 since this is an optimal solution concentration difference as discussed by Satapathy et al [17]. Weak solution inlet temperature is the exit temperature of the solution heat exchanger, and it is calculated to be 318 K considering heat exchanger effectiveness of 80% and neglecting the temperature rise in solution pump.…”

Section: Design Resultsmentioning

confidence: 99%

Experimental studies on a compression–absorption system for heating and cooling applications

Satapathy¹,

Mopuri

2008

Int. J. Energy Res.

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SUMMARYAn experimental study has been carried out on a single-stage compression-absorption system for simultaneous heating and cooling with R22 and E181 (DMETEG) as the working fluid pair. An absorber, being the major component of the system, is designed to absorb the amount of vapour that can be handled by the selected refrigerant compressor. The designs of the other components of the system are based on the design result of the absorber. The experimental test results have been compared with the results obtained from the theoretical analysis of the system. Though the experimental results are found to match the theoretical results qualitatively, the performance of the experimental test rig is found to be lower than that of the theoretical predictions due to various heat losses from the system and non-ideal compression.

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Comparative thermodynamic analysis of a hybrid refrigeration system for promotion of cleaner technologies

Anand

Gupta

Tyagi

2014

J Therm Anal Calorim

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A comparative study of R22–E181 and R134a–E181 working pairs for a compression–absorption system for simultaneous heating and cooling applications

Cited by 11 publications

References 4 publications

Working Pair Selection of Compression and Absorption Hybrid Cycles through Predicting the Activity Coefficients of Hydrofluorocarbon + Ionic Liquid Systems by the UNIFAC Model

Working Pair Selection of Compression and Absorption Hybrid Cycles through Predicting the Activity Coefficients of Hydrofluorocarbon + Ionic Liquid Systems by the UNIFAC Model

Experimental studies on a compression–absorption system for heating and cooling applications

Comparative thermodynamic analysis of a hybrid refrigeration system for promotion of cleaner technologies

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