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&[DATE] &[TIME] - &[FILENAME]

Investigating NaOH outlet concentration in case of Demi Water injection failure...

Load.kAmp 9121531 mat kA * :

Faraday's law, 178 elements, 98% cell efficiency NaOH.100% 178 0.98 * 40 * g mol / * 1 96485.4 C mol / * / * Load.kAmp * : kg hr / 2343.0927 3124.1236 3905.1546 31 mat

60% NLL for NaOH tank, 90% for head tank volume & volume for connecting  piping ΣVolume.Equipment 0.6 18 * m 3^* 0.9 3 * m 3^* + 1 m 3^* + : 14.5 m 3^*

NaOH.Feed_Flow 54 m 3^hr / * :

After water injection NaOH.Feed_Conc 30 % * :

NaOH.Equipment_Conc 31.6 % * :

NaOH.Production_MFlow NaOH.100% NaOH.Equipment_Conc / : kg hr / 7414.8504 9886.4672 12358.0841 31 mat

Insert accurate density for accurate result; density at standard 25Chttps://www.handymath.com/cgi-bin/naohtble3.cgi?tmptr=25&spcfgrv=&conc=31.6&submit=Calculate ρ.NaOH 1341.56 kg m 3^/ * :

NaOH.Production_VFlow NaOH.Production_MFlow ρ.NaOH / : m 3^hr / 5.527 7.3694 9.2117 31 mat

Some water is lost to H2 escaping ELZ & some water is added to caustic via water transport from
anolyte to catholyte across membrane.

ResidenceTime.Equipment ΣVolume.Equipment NaOH.Feed_Flow NaOH.Production_VFlow + / vectorize : min 14.6152 14.1765 13.7633 31 mat

178 elements each element cathode capacity is 73L ResidenceTime.ELZ 17873 * L * NaOH.Feed_Flow / : min 14.4378

So approximately  within ~14.5min (single cycle through ELZ) equipment concentration  & ELZ exit concentration  will be equal Cycles_of_Concentration ResidenceTime.Equipment ResidenceTime.ELZ / : 1.01 0.98 0.95 31 mat

Time counter after demi water injection is stopped time 152 range min * : min 1234551 mat

j 1 Load.kAmp rows range i 1 time rows range NaOH.Out_Conc i el NaOH.Equipment_Conc : NaOH.in ρ.NaOH NaOH.Out_Conc i el * NaOH.Feed_Flow * ResidenceTime.ELZ * : H2O.in ρ.NaOH 1 NaOH.Out_Conc i el - (* NaOH.Feed_Flow * ResidenceTime.ELZ * : NaOH.Out_Conc i el NaOH.in NaOH.100% j el time i el * + NaOH.in NaOH.100% j el time i el * + H2O.in + / x ≡ x roots : 41 line for result j el NaOH.Out_Conc : 21 line for

result % 31.7529 31.9051 32.0566 32.2075 32.3577 51 mat 31.8037 32.0062 32.2075 32.4076 32.6065 51 mat 31.8544 32.107 32.3577 32.6065 32.8535 51 mat 31 mat

time 60 / result 1 el 100 * augment time 60 / result 2 el 100 * augment time 60 / result 3 el 100 * augment y 32 : 4 1 sys

If initial concentration was 31.6% at disturbance:
32% limit is crossed after ~2.6min @9kA
32% limit is crossed after ~1.8min @12kA
32% limit is crossed after ~1.6min @15kA