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Tetrabutylammonium bromide phase change experimental study of thermal properties

TBAB solution reduced the crystallization undercooling. Time / min Figure 3 TBAB solution of borax on the undercooling of Fig. 3NatriumbiboricumeffectonsupercoolingofTBABsolution Figure 4 cycles TBAB solution of the phase transition of Fig. 4Freezing-meltingtimeseffectonphase-changeprocessofTBABsolution2.4 TBAB solution of borax on the impact of the latent heat is shown in Figure 5 TBAB solution of borax on the impact of the latent heat from Figure 5 (a) shows that: 40% concentration of TBAB solution for the latent heat of fusion 187.867J / g, latent heat is 137.799J / g, while Figure 5 (b) we know: 2% concentration of borax of the latent heat of fusion TBAB solution was 187.030J / g, latent heat is 141.111J / g. TBAB solution of borax can be seen on the latent heat has no effect. A 10-cent embroidery Hei Hei Ling; (a) 40% TBAB solution latent heat (b) containing 2% borax solution, 40% TBAB latent heat of TBAB solution of borax in Figure 5 the latent heat of Fig. 5Natriumbiboricumeffectonphase-changelatentheatofTBABsoluti0n3 conclusion of the phase transition temperature of TBAB solution by its concentration, 25%, 45% of the concentration of a solution of the solidification temperature of TBAB in the range of 5.8 ~ 9.3 ℃. TBAB concentration of 40% of the stable solution of the phase transition, and the phase transition temperature of 9 ℃, so the concentration of TBAB solution is more suitable for storage air conditioning system. Add 2% concentration of borax can reduce the TBAB solution crystallization undercooling 2.4 ℃. After cycle 11, after storage, TBAB solution crystallization in the cooling process reduces the undercooling of 2.2 ℃, while the phase transition temperature does not change. Add borax concentration of 2% solution of TBAB latent heat has no effect. Therefore,[link widoczny dla zalogowanych], TBAB solution is a good air-conditioning storage materials. Such as the Canadian O plus 0OOO000OOOO543204 29 No. 5 October 2008 tetrabutyl ammonium O phase change thermal properties of cold Meng Study 7oL29, No. 5October. 2008 [1] side of your silver, and so on. Storage air conditioning technology [M]. Beijing: Mechanical Industry Press, 2006. (FangGuiyin, eta1.Energystorageairconditioningtechnology [M]. Beijing: ChinaMachinePress, 2006.) F21MyriamDarbouret, MichelCournil, Jean-MichelHe jingling i. RheologicalstudyofTBABhydrateslurriesassecondarytwo-phaserefrigerants [J]. InternationalJournalofRefrigeration. 2005.28 (5) :663-671. [3】 HiroyukiOyama, WataruShimada,[link widoczny dla zalogowanych], TakaoEbinuma,[link widoczny dla zalogowanych], eta1. Phasediagram, latentheat, andspecificheatofTBABsemiclathratehydratecrystals [J]. FluidPhaseEquilibria, 2005.234 (2) :131-135. [4] He Qinbo, Ming-Wei Tong, Liu Yudong. Nano-fluid phase change temperature nucleation undercooling experimental study [J]. Refrigeration Technology,[link widoczny dla zalogowanych], 2007,[link widoczny dla zalogowanych],28 (4) :33-36. (HeQinbo, TongMingwei, LiuYudong.Experimentalstudyonsuper-coolingdegreeofnanofluidsforcryogeniccoolstorage [J]. JournalofRefrigeration, 2007,28 (4) :33-36.) A 11 -

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