Local air quality impacts due to downwash around thermal power plants: Numerical simulations of the effect of building orientation

1999-09-01
Kayın, Serpil
Tuncel, Süleyman Gürdal
Yurteri, Coşkun
One of the primary adverse environmental impacts associated with power generation facilities and in particular thermal power plants is local air quality. When these plants are operated at inland areas the dry type cooling towers used may significantly increase ambient concentrations of air pollutants due to the building downwash effect. When one or more buildings in the vicinity of a point source interrupt wind flow, an area of turbulence known as a building wake is created. Pollutants emitted from relatively low level sources can be caught in this turbulence affecting their dispersion. In spite of the fact that natural gas-fired combined-cycle power plants have lower air emission levels compared to other power plants using alternative fossil fuel, they can still create significant local air pollution problems. In this paper, local air quality impacts of a natural gas-fired combined-cycle power plant located in a coastal area are compared with those of another natural gas-fired combined-cycle power plant having identical air emissions but located in an inland area taking into account differences in topography and meteorology. Additionally, a series of scenarios for the inland site have been envisaged to illustrate the importance of plant lay-out configurations paying particular attention to the building downwash effect. Model results showed that different geometrical configurations of the stacks and cooling towers will cause remarkable differences in ambient air pollutant concentrations; thus it is concluded that when selecting a plant site, a detailed site-specific investigation should be conducted in order to achieve the least possible ambient air pollution concentrations with the given emissions.
ENVIRONMENTAL MONITORING AND ASSESSMENT

Suggestions

Environmental and Thermal Performance of a Typical Concrete Based External Wall System
Sassani, Alireza; Akgül, Çağla; Pasaoglu, Ozgur (null; 2014-10-22)
Construction and operation of the built environment is recognized as a significant source of greenhouse gas emissions due to high energy consumption. One of the most critical built environment elements are the external walls. For Turkey, specifically the concrete based external wall systems are of importance. Generally, the concrete based external wall systems are composed of several layers: internal gypsum based plaster, concrete, insulating material, and external plaster. The thermal performance of the wa...
Optimal design and operation of land-treatment systems for petroleum hydrocarbons
Kivanc, S; Ünlü, Kahraman (1999-04-22)
Land treatment technology has been extensively used for the disposal of petroleum hydrocarbon containing wastes. Effective management of land treatment systems requires optimum design and operation of the system in order to achieve the fastest and most complete degradation of petroleum hydrocarbons without contamination of the environment. This paper describes a model that can be used for optimal design and operation of land treatment systems for petroleum hydrocarbon containing wastes. The model is compose...
Inorganic Cadmium Detection Using a Fluorescent Whole-Cell Bacterial Bioreporter
Elcin, Evrim; Öktem, Hüseyin Avni (Informa UK Limited, 2020-11-01)
Cadmium pollution has become a serious environmental issue due to its toxicity and frequent entrance into environment components such as soil, water, and air via many anthropogenic sources. Over the last two decades, whole-cell bacterial bioreporters have been acknowledged as bio-sentinels for the determination of toxic heavy metals. Herein a sensitive and quite specific bacterial bioreporter was developed to cope with the need for the rapid and simple determination of cadmium. The construction and characte...
Air quality impacts of electricity use in domestic heating: A comparative study for Ankara
Kayin, S; Yavuzdemir, F (1997-09-26)
In this study, existing air quality affects of current domestic heating systems in comparison to the electricity use alternative in Ankara have been analysed. For the winter season 1991-1992 heat energy used in Ankara for domestic heating has been calculated. For the hypothetical case of electricity use instead of the current domestic heating systems in the city, Industrial Source Complex - Short Term dispersion model has been used for six site alternatives and for two different thermal power plant technolo...
Fluid-CO2 injection impact in a geothermal reservoir: Evaluation with 3-D reactive transport modeling
AKIN, TAYLAN; Baser, Ali; Saracoglu, Onder; Akın, Serhat (2022-01-01)
Geothermal energy is commonly recognized as an environmentally friendly source of energy. However, geothermal fluids have unusually high CO2 content, particularly, in carbonated geothermal reservoirs. An efficient method to mitigate the CO2 emissions of geothermal power plants is to re-inject the captured CO2 with the effluent fluid to mineralize mainly into calcite under reservoir conditions (e.g., reservoir temperatures ranging from 200 to 220 degrees C). One of the major concerns about the re-injection o...
Citation Formats
S. Kayın, S. G. Tuncel, and C. Yurteri, “Local air quality impacts due to downwash around thermal power plants: Numerical simulations of the effect of building orientation,” ENVIRONMENTAL MONITORING AND ASSESSMENT, pp. 61–77, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30317.