Articles online

Effect of Heat Recovery from Flue Gas on the Local Humidity and NOx Dispersion in a Thermal Power Station

Category: Articles

Volume: 14 | Issue: 3 | Pages: 840-849
DOI: 10.4209/aaqr.2013.01.0028
PDF | RIS | BibTeX

Shi Chang Wu1, Young Min Jo 1, Young Koo Park2

  • 1 Department of Environmental Science and Engineering, Kyung Hee University, Gyeonggi-Do 446-701, Korea
  • 2 Department of Environmental Engineering, Kangwon National University, Samcheok 245-711, Korea


The flue gas dispersion from the stack of a power station was investigated prior to addition of a high efficiency heat recovery facility. Decrease of the flue gas temperature from 115°C to 40°C by heat recovery could influence the local humidity and thermal NOx level. It might also result in the formation of a white large plume due to the early saturation of vapor around the stack, and deteriorate dispersion of thermal NOx. Numerical simulation revealed that the area influenced by flue gas has been enlarged, particularly in winter. The volume of visible plume indicating RH 1.0 increased to 120 m high and 80 m wide for the flue gas at 40°C, while a smaller plume was formed that was 85 m high and 50 m wide for that at 115°C. The humid air of the flue gas extended nearly 160 m further along the ground. The distance for the maximum NO2 concentration on the ground increased by 80 m and 50 m for 1 m/s wind and 3 m/s, respectively. The area influenced at the ground level expanded more than 250 m at 1 m/s wind after heat recovery. In particular, lowering the temperature of flue gas may affect the local environment more significantly in unusual cases including temperature inversions.


Numerical simulation Heat recovery Flue gas Gas dispersion Nitrogen dioxide

Related Article

Interpretation of Atmospheric Aerosol Measurements by Means of a Numerical Simulator of New Particle Formation Events

Aare Luts , Urmas Hõrrak, Jaan Salm, Marko Vana, Hannes Tammet
Volume: 16 | Issue: 4 | Pages: 930-942
DOI: 10.4209/aaqr.2015.08.0511
PDF | Supplemental material

Evaporation and Movement of Fine Water Droplets Influenced by Initial Diameter and Relative Humidity

Yi Wang , Yang Yang, Yan Zou, Yingxue Cao, Xiaofen Ren, Yanbin Li
Volume: 16 | Issue: 2 | Pages: 301-313
DOI: 10.4209/aaqr.2015.03.0191

Critical Emissions from the Largest On-Road Transport Network in South Asia

Saroj Kumar Sahu , Gufran Beig, Neha Parkhi
Volume: 14 | Issue: 1 | Pages: 135-144
DOI: 10.4209/aaqr.2013.04.0137

Ambient Air Quality during Diwali Festival over Kolkata – A Mega-City in India

A. Chatterjee , C. Sarkar, A. Adak, U. Mukherjee, S.K. Ghosh, S. Raha
Volume: 13 | Issue: 3 | Pages: 1133-1144
DOI: 10.4209/aaqr.2012.03.0062