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1、High energy static spark generator,Miao Nan Industrial Explosion Protection Institute, Northeastern University Tel: 15040295249,What is high energy spark？,High energy：E100J in nominal Application：pmax, Kst, MEC etc. in 20L explosion chamber,2,3,Control box,Front,Back,5,Apparatus,6,Dust explosion tes
2、t,Parameters: 1. pmax ，Kst 2. MEC Ignition： Chemical Ignition, Electrostatic Ignition Dust： Lycopodium, HCMA (3-Hydroxy-4-methoxycinnamaldehyde),7,1. pmax , Kst - Chemical Ignition-Lycopodium,pmax=0.734MPa，Kst=17.014/(MPam/s),8,1. pmax , Kst - Chemical Ignition-HCMA,pmax=0.938MPa，Kst=34.542/(MPam/s)
3、,9,pmax=0.712MPa，Kst=14.229/(MPam/s),1. pmax , Kst - Electrostatic Ignition-Lycopodium,10,pmax=0.868MPa，Kst=30.414/(MPam/s),1. pmax , Kst - Electrostatic Ignition-HCMA,11,1. pmax , Kst - Test result,12,pmax -Lycopodium,pmax -HCMA,Kst-Lycopodium,Kst-HCMA,1. pmax , Kst - Parameters as function of dust
4、 concentration, at two kinds of the ignition source,13,PC=0.82839pE+0.15597,KC=1.06097KE+1.44067,KCKst in chemical ignition, (MPam/s); KEKst in electrostatic ignition, (MPam/s)。 Goodness of fit： 0.97324,PCPmax in chemical ignition, MPa; PEPmax in electrostatic ignition, MPa. Goodness of fit：0.94824,
5、Reason：1. Ignition mechanism; 2.Actual Ignition energy,1. pmax , Kst Analysis (Linear fitting),14,2. MEC - Chemical Ignition-2.5kJ,Lycopodium,HCMA,MEC=45g/m3,MEC=50g/m3,15,2. MEC Electrostatic Ignition-2.5kJ,Lycopodium,HCMA,MEC=55g/m3,MEC=80g/m3,16,2. MEC Electrostatic Ignition-8kJ,Lycopodium,HCMA,M
6、EC=45g/m3,MEC=50g/m3,17,Comparison of MEC in chemical ignition and electrostatic ignition,For the MEC test, the results with electrostatic ignition are higher than the chemical ignition, but they could be the same by increasing the nominal energy of electrostatic ignition.,2. MEC Analysis,18,Test of
7、 Spark Energy,Nominal Energy：energy stored in the capacitor. It is estimated for the spark energy,Eenergy in the capacitor, J; Ccapacitor values, F; Uvoltage of capacitor, V,Measured Energy：energy measured in integration method,Eenergy measured, J; ttime, s; uvoltage between the electrode, V; icurre
8、nt between the electrode, A,19,Test principle,20,Current and voltage curve as a function of time,-200V,-400V,-600V,-800V,-1000V,Capacitance is 0.022F,21,Test Result,22,23,Discharge Efficiency Curve as a Function of Nominal Energy,24,More Work,More kinds of dust test to compare chemical ignition and electrostatic ignition. Improve the actual energy of the spark. Three electrodes without inductance may be work.,Thank you.,
