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Modelling and experimental validation of an in-tube vertical falling film absorber with counter flow arrangement of solution and gas.
Author(s) : AMINYAVARI M., APRILE M., PISTOCCHINI L., et al.
Type of article: Article, IJR article
Summary
In the present study, an in-tube vertical falling film absorber with gas and falling film in counter-current flow arrangement, which utilizes pair as the working fluid, has been built and is then integrated with a single effect absorption heat pump. Twelve sets of tests have been designed and conducted, taking into account the standard operating range of these types of heat pumps. The results obtained from performing a testing procedure on this experimental setup have been utilized to assess the accuracy of a developed mathematical model in simulating the corresponding absorption phenomenon. The obtained results demonstrate an acceptable agreement between the values simulated by the model and the experimental data, while addressing various heat duties. Furthermore, it has been shown that the transfer coefficients between the liquid film and the interface are order/s of magnitude higher than the ones between the gas and the interface and therefore, the absorption process is controlled by the heat and mass transfer coefficients between the film and the interface. Moreover, it has been revealed that in falling film absorber modelling, insignificant errors in the evaluation of rate of absorption can lead to a notable miscalculation of the absorber size. It is concluded that the effect of hydrodynamic of the film on the heat and mass transfer process should be considered for future enhancement of the model.
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Pages: 72-82
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Details
- Original title: Modelling and experimental validation of an in-tube vertical falling film absorber with counter flow arrangement of solution and gas.
- Record ID : 30025602
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 100
- Publication date: 2019/04
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.12.012
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Indexing
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Numerical results of falling film absorption wi...
- Author(s) : WASSENAAR R. H., SEGAL A.
- Date : 1998/07/06
- Languages : English
- Source: Thermodynamics, heat and mass transfer of refrigeration machines and heat pumps. Proceedings of the EUROTHERM Seminar 59./ Thermodynamique et transferts de chaleur et de masse dans les machines à froid et pompes à chaleur. Comptes rendus du séminaire EUROTHERM 59.
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Thermodynamic data in a falling film absorber o...
- Author(s) : ROMERO R. J., BEST R., HERNÁNDEZ J., et al.
- Date : 1999/03/24
- Languages : English
- Source: Proceedings of the International Sorption Heat Pump Conference.
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Local heat and mass transfer in a counter-curre...
- Author(s) : KOYAMA S., KIM H. Y., SAHA B. B.
- Date : 2002/12/04
- Languages : English
- Source: Green breeze from Asia: frontiers of refrigerants, heat transfer and system.. ACRA-2002. Proceedings of the Asian conference on refrigeration and air conditioning.
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Numerical study of absorption in a laminar fall...
- Author(s) : GOMMED K., GROSSMAN G., KOENIG M. S.
- Date : 2001
- Languages : English
- Source: ASHRAE Transactions. 2001 Winter Meeting, Atlanta, GA. Volume 107, part 1 + CD-ROM.
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Modelling of absorbers and comparison of cocurr...
- Author(s) : HACKNER M., STEPHAN K.
- Date : 2001/10/03
- Languages : English
- Source: Thermophysical Properties and Transfer Processes of New Refrigerants.
- Formats : PDF
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