Impact of Relative Humidity on Cooling Tower Plume Dispersion

2013 ◽  
Vol 807-809 ◽  
pp. 168-171
Author(s):  
Rui Ping Guo ◽  
Chun Lin Yang ◽  
Chun Ming Zhang ◽  
Bing Lan
Keyword(s):  
Relative Humidity ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Wind Direction ◽  
Cooling Tower ◽  
Plume Dispersion ◽  
Plume Height ◽  
Different Seasons ◽  
Change Trend ◽  
Dispersion Character

The SACTI model (Seasonal Annual Cooling Tower Impact) as the environmental impact assessment of cooling tower was applied in this paper, which was used to simulate the plume characters under different kinds of relative humidity. The three kinds of relative humidity were 70%, 80% and 90% and it was analyzed that the plume character under these three kinds of relative humidity. Results showed that the plume length, plume height and plume radius will present different change trend when relative humidity changed. Additionally, the plume dispersion character in different seasons presented obviously variations and the different wind direction also play important role in prediction of cooling tower plume dispersion.

Response Analysis of Cooling Tower Plume Dispersion to the Release Height

2013 ◽  
Vol 316-317 ◽  
pp. 590-593
Author(s):  
Rui Ping Guo ◽  
Chun Lin Yang ◽  
Chun Ming Zhang
Keyword(s):  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Cooling Tower ◽  
Response Analysis ◽  
Plume Dispersion ◽  
Length Frequency ◽  
Plume Height ◽  
Release Height ◽  
Relative Change

The SACTI model (Seasonal Annual Cooling Tower Impact) as the environmental impact assessment of cooling tower was applied in this paper, which was used to simulate the plume characters under different cooling tower heights. The results showed that the plume length, plume height and plume radius presented noticeable differences with variances of different distances and wind directions under different cooling tower heights. The comparisons of differences of plume characters indicated that the relative change of plume length frequency displayed obvious decreased trend with increased distance when distance was greater than 500m, and that of plume height frequency appeared parabolic curve with increased distance. The relative change of plume radius frequency expressed totally descended trend.

The Effect of Wind Speed on Cooling Tower Plume Dispersion

2013 ◽  
Vol 732-733 ◽  
pp. 144-147
Author(s):  
Rui Ping Guo ◽  
Chun Lin Yang ◽  
Chun Ming Zhang
Keyword(s):  
Wind Speed ◽  
Impact Factor ◽  
Cooling Tower ◽  
Normal Operation ◽  
Plume Dispersion ◽  
Plume Height ◽  
Wind Speeds ◽  
Important Impact ◽  
Change Trend ◽  
Dispersion Character

Wind speed was an important impact factor when simulating the cooling tower plume dispersion. The SACTI model was selected in this paper and this model was used to predict the plume dispersion character discharging from cooling tower under normal operation and three different kinds of wind speeds. The three kinds of wind speeds were 2 m/s, 4 m/s and 6 m/s and it was analyzed that the plume character under these three wind speeds. Results showed that the plume length, plume height and plume radius will present different change trend when wind speed changed.

Effect of Different Heat Rejection Scenarios on Cooling Tower Plume Dispersion

2013 ◽  
Vol 448-453 ◽  
pp. 213-216
Author(s):  
Rui Ping Guo ◽  
Chun Lin Yang ◽  
Bing Lan ◽  
Chun Ming Zhang
Keyword(s):  
Cooling Tower ◽  
Plume Dispersion ◽  
Impact Model ◽  
Length Frequency ◽  
Plume Height ◽  
Heat Rejection ◽  
Variation Trend ◽  
The Impact

This impact of heat rejection on cooling tower plume dispersion was studied in this paper by applied SACTI (Seasonal Annual Cooling Tower Impact) model. In order to analyze the impact of heat rejection (HR), we set five scenarios including observed, HR decrease 5% (HR-5) and 10% (HR-10), and increase 5% (HR+5) and 10% (HR+10). Results showed that plume length frequency, plume height frequency and plume radius frequency will present different variation trend when heat rejection increase and decrease scenarios. On the whole, the plume character parameter will decrease as heat rejection decrease, but will increase as heat rejection increasing.

A history of botanical collections in the Luangwa Valley, Zambia

1998 ◽  
Vol 25 (2) ◽  
pp. 283-291
Author(s):  
P.S.M. PHIRI ◽  
D.M. MOORE
Keyword(s):  
Eighteenth Century ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Vascular Plants ◽  
Central Africa ◽  
Peak Activity ◽  
Historical Account ◽  
History Of ◽  
The 1960S ◽  
Made In

Central Africa remained botanically unknown to the outside world up to the end of the eighteenth century. This paper provides a historical account of plant explorations in the Luangwa Valley. The first plant specimens were collected in 1897 and the last serious botanical explorations were made in 1993. During this period there have been 58 plant collectors in the Luangwa Valley with peak activity recorded in the 1960s. In 1989 1,348 species of vascular plants were described in the Luangwa Valley. More botanical collecting is needed with a view to finding new plant taxa, and also to provide a satisfactory basis for applied disciplines such as ecology, phytogeography, conservation and environmental impact assessment.

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