Novel hybrid composite discharge electrode for electrostatic precipitator

Figures & data

Figure 1. Rigid discharge electrode.

Figure 2. Experimental setup for testing electrodes in present study.

Figure 3. Discharge electrodes used in present study. The Hand lay-up HCE and Pre-preg HCE (right), the metal electrode (middle), and the Hand lay-up CE HCE (left).

Table 1. Baseline samples.

Sample	Description	Dimension (W [inch] × L [foot])
Copper wire	18-Gauge wire	3’
Carbon composite Electrode (CCE)	Four 3K plain weave Carbon fiber layers and epoxy (fiberglass 2000), Fabricated using Hand lay-up	0.5” × 3’
Metal tape	Plain carbon steel	0.5” × 3’
Metal mesh	Three layers of stainless steel mesh, 304 Stainless Steel mesh 60 × 60, adhered with epoxy	1.25” × 3’
Polypropylene composite tape (PP)	AS4 unidirectional carbon fiber with polypropylene as the matrix, single layer	0.5” × 3’

Figure 4. V-I characteristic curves for the baseline materials.

Figure 5. V-I characteristic curves for the PP HCE and the metal electrode.

Figure 6. V-I characteristic curves for the Hand lay-up HCE and the metal electrode.

Figure 7. V-I characteristic curves for the Hand Lay-up CE HCE and the metal electrode.

Figure 8. V-I characteristic curves for the Pre-preg HCE and the metal electrode.

Figure 9. Peak power at variable distance (from the grounded plate).

Table 2. Steady-state test.

Electrode sample	Width (inch)	Current (mA)	Voltage (kV)	Power (W)
Metal electrode	1.25	9.5	40	380
Pre-preg HCE	1.25	9	43	387
Hand lay-up CE HCE	1.25	9.5	41.6	395
Hand lay-up HCE	1.25	8.5	40.0	340

Figure 10. Corona onset voltage.

Figure 11. Three-point corona pattern for spiked metal. The left image was captured by using an UV camera.

Figure 12. The uniform corona pattern for the HCE. (a) The corona at 54.3 kV and 8.5 mA. (b)The uniform corona. (c) The uniform corona at the spark over point.