Laboratory evaluation and modeling of electrostatic precipitation of PM emissions from poultry buildings.(particulate matter)(Report): An article from: ASHRAE Transactions

This digital document is an article from ASHRAE Transactions, published by American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc. on July 1, 2009. The length of the article is 8113 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.

From the author: Particulate matter (PM) emissions from the poultry industry are a major pollution concern. Development of an effective PM mitigation technology is urgently needed. In this study, the potential of an electrostatic precipitator (ESP) for collecting PM emissions from poultry facilities was evaluated using a commercial ESP unit under simulated laboratory conditions. The effects of operating parameters such as charger voltage, superficial air velocity and PM concentration on the performance of a two-stage plate ESP were evaluated. An empirical model for predicting ESP performance was developed. Preliminary factor screening analyses have shown that charger voltage (7 kV to 10 kV) and superficial air velocity [1 m/s (200 ft/min) to 5 m/s (1000 ft/min)] affect ESP performance significantly while PM concentration (2.5 mg/[m.sup.3] to 5 mg/[m.sup.3]) had negligible effect ([alpha]=0.05). The ESP collection efficiency increased with voltage and decreased with velocity. The relationship between charger voltage and superficial air velocity and PM collection efficiency for particles within size ranges of 0.3-0.5, 0.5-1, 1-5, 5-10, 10-25, >25 [micro]m, [PM.sub.1], [PM.sub.5], and [PM.sub.10] were apparently nonlinear. The ESP performance approached a peak point at 9 kV charger voltage and 1 m/s air velocity. The optimized operating condition to be used at an actual farm would depend on the desired degree of PM collection. To collect at least 90% of all particles, the operating conditions were 9 kV and 2.5 m [s.sup.-1]. The power consumption of the ESP to collect 90% of the total particles is 90 watts/[m.sup.2] (29 BTU/h/[ft.sup.2]) of duct cross-sectional area. The ESP unit produced very negligible amount of ozone (