An experimental study of a combined air conditioning unit

A combined vapor compression — indirect evaporative cooling system is a promising concept for conventional air conditional systems. Various organizations in Russia and abroad carry out research in this area. However, there is no data on the subject available in the public domain. The authors of the article developed an analytical model of the combined air condition ing unit. The analytical modelling was performed for various climate zones present in the Russian Federation. The influence of the component efficiency on the efficiency of the system as a whole was established. The experimental research and assumption validation were performed on a specially designed testing stand. It allowed simulating various temperature and humidity conditions of the environment and the indoor air. An indirect evaporation heat-exchanger of an original design was made to conduct the experiments. Experimental data for the cooling capacity of the combined unit was obtained. The dependence of the cooling capacity on the thermal efficiency of the indirect evaporation heat-exchanger was established for the various climate zones. The experimental data and the analytical modelling results were compared. The experimental results have confirmed the correctness of the initial assumptions. 

References

[1] Home Energy Magazine Online May/June 1997. Available at: http://www.homeenergy.org/show/article/nav/coolingandair/id/1301 (accessed 15 Mach 2015).

[2] Katalog firmy Kampmann [Catalogue of companies Kampmann]. Klimanaut mission frishluft. Artikelgruppe 3.76, 3.80, 2009-02. Available at: http://www.kampmann.de/download.php?file=pdf_files/prospekte_flyer_de_/produktuebersicht.pdf (accessed 28 February 2015).

[3] Katalog firmy Coolerado [Catalogue of companies Coolerado]. Available at: http:// www.coolerado.com/products/stand-alone-air-conditioner-products/ (accessed 15 February 2015).

[4] Katalog firmy Menerga «Air-conditioning and climate-control technology. Sorption based air conditioning» [Catalogue of companies Menerga «Air-conditioning and climate-control technology. Sorption based air conditioning»]. Available at: http://www.menerga.com/ImageVault/publishedmedia/6hqlhxubx5wd2lrughl0/Sorpsolair_72_73_EN.pdf (accessed 15 Mach 2015).

[5] Tekhnicheskie kharakteristiki vozdushnykh ekonomaizerov EcoBreeze 990-4600A-028 [Specifications of air economizers EcoBreeze 990-4600A-028]. Available at: http://download. schneider-electric.com/files?p_File_Id=445532779&p_File_Name=JBRH-8U4SMN_R0_EN.pdf (accessed 10 Mach 2015).

[6] Velasco Gomez E., Tejero Gonzalez A., Rey Martinez F.J. Experimental characterisation of an indirect evaporative cooling prototype in two operating modes. Applied Energy, 2012, vol. 97, pp. 340–346.

[7] Xuan Y.M., Xiao F., Niu X.F., Huang X., Wang S.W. Research and application of evaporative cooling in China: A review (I) — Research. Renewable and Sustainable Energy Reviews, 2012, vol. 16, iss. 5, pp. 3535–3546.

[8] Garanov S.A., Zharov A.A., Panteev D.A., Sokolik A.N. Vodoisparitel’noe i kombinirovannoe okhlazhdenie vozdukha [Photospreteen and combined cooling air]. Inzhenernyi zhurnal: nauka i innovatsii [Engineering Journal: Science and Innovations]. 2013, no. 1(13), pp. 84–90.

[9] Gorin A.N. Al’ternativnye sistemy okhlazhdeniia i konditsionirovaniia vozdukha s ispol’zovaniem isparitel’nogo okhlazhdeniia. Diss. dokt. tekh. nauk [Alternative cooling systems and air conditioning systems using evaporative cooling. Dr. tech. sci. diss.]. Odessa, 2007. 419 p.

[10] Makarovets N.A, Kostin V.E., Osipov E.N. Novye materialy v tekhnike kosvennoisparitel’nogo okhlazhdeniia vozdukha [New materials in engineering indirectly, evaporative cooling]. Mezhotraslevoi al’manakh, Promyshlennost’, Ekonomika: Novye energosberegaiushchie tekhnologii [Interbranch almanac, Industry, Economy: New energy saving technologies]. 2011, no. 1, pp. 82–84. Available at: www.yauza-m.ru/files/s1.doc (accessed 15 Mach 2015).