Research Article

Heat Transfer Enhancement of Energy Pile with Nanofluids as Heat Carrier

Table 2

Experimental results of the effect of surfactant on the stability of nanofluids [52].

NanofluidsParticle concentrationSurfactantExperimental results

CuO–H2OPAAS0.4–0.8 wt%
CuO–H2O0.97 wt%SDBS1.94 wt%
CuO–H2O2, 4 wt%SDBS2, 4 wt%
Cu–H2O0.l wt%SDBS, CTAB, OPSDBS: 0.1 wt%
Cu–H2O0.l wt%SDBS, CTAB, TX-10SDBS: 0.07 wt%
Al2O3–NH3∙H2O0.l wt%SDBS0.l wt%
Al2O3–H2O0.l wt%SDBS0.l wt%
α-Al2O3–H2OSHP, CTAC, PEG400, SDBSSDBS: 2.0 wt%
γ-Al2O3–H2O2.0 wt%PEG600, T-80, SDBS, SDSPEG600: 0.1 wt%
TiO2–H2O0.l wt%SDS0.l wt%
TiO2–H2O0.7 wt%SDBS, CTAB, PVPSDBS: 0.21 wt%
TiO2–H2O20 mg/LSDBS, CTAC, Span80SDBS: 25 mg/L
SiO2–H2O2.5 wt%TTAB, CTAB, OTABCTAB: 1.4 mmol/L
MWNT–H2OSDBS, HTAB, OPOP: 1.5 mL/L
MWNT–H2O0.5 wt%12-3-12, 2Br−10.6 wt%