Environmental Engineering Reference
In-Depth Information
Table 5.2
Parameter comparisons of various ozone generation technologies (per unit)
Dry air source
Oxygen
Ozone generation
technologies
Yield rate
(g/(kW h))
Yield rate
(g/(kW h))
Content
(g/m
3
)
Content
(g/m
3
)
Commercial product
5.64 - 11.55
<55.56
16.55-60.7
<111.11
High-frequency
high-voltage discharge
2.6 - 5.3
2.56 - 43.62
24.1-76.8
70.56 - 158.32
High-frequency
high-voltage discharge
(SF
6
added)
6.11-12.46
6.02 - 102.51
—
—
Experimental data
from Samaranayake
[1,2]
<21.4
<100.0
<21.4
<200.0
Pulse discharge
(single channel)
7.1 - 39.3
294.0 - 407.8
11.8 - 57.9
493.46 - 1081.09
Pulse discharge
(double channel)
2.9 - 27.7
163.00 - 271.39
12.1 - 48.0
467.68 - 700.88
130
20
120
Commercial products
Our experiments
Commercial products
Our experiments
110
18
100
16
90
80
14
Commercial products
Our experiments
Commercial products
Our experiments
70
12
60
50
10
40
8
30
20
6
10
100
200
300
400
500
600
100
200
300
400
500
600
flow (l/h)
Flow (L/h) Flow (L/h)
Flow
l/h
(a)
(b)
Fig. 5.3
Ozone concentration (a) and yield (b) variation with flow (oxygen source)
Using a ns-grade power supply to generate ozone is firstly reported by
Samaranayake's group
[1,2]
. The discharge chamber used was a line
(helix)-cylinder type and experiments were conducted with a 1 L/min flow rate,
1-mm electrode gap, pulse repetition frequency below 500 pps, peak voltage
below 60 kV, and pulse width of 120 ns, yielding a 200 g/(kWh) ozone supply. In
our ozone generator, some modifications were carried out to improve the ozone
generation performance, compared with the generator of Samaranayake's group
[1,2]
. In detail, a flat discharge chamber was adopted and the operational parameters
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