Performance characteristics of an air-cooled steam condenser incorporating a hybrid (dry/wet) dephlegmator

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dc.contributor.advisor Kroger, D. G. Heyns, Johan Adam
dc.contributor.other Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering. 2010-02-06T11:32:23Z 2010-02-06T11:32:23Z 2008-12
dc.description Thesis (MScEng (Mechanical and Mechatronic Engineering))--Stellenbosch University, 2008. en_ZA
dc.description.abstract This study evaluates the performance characteristics of a power plant incorporating a steam turbine and a direct air-cooled dry/wet condenser operating at different ambient temperatures. The proposed cooling system uses existing A-frame air-cooled condenser (ACC) technology and through the introduction of a hybrid (dry/wet) dephiegmator achieves measurable enhancement in cooling performance when temperatures are high. In order to determine the thermal-flow performance characteristics of the wet section of the dephlegmator, tests are conducted on an evaporative cooler. From the experimental results, correlations for the water film heat transfer coefficient, air-water mass transfer coefficient and the air-side pressure drop over a deluged tube bundle are developed. During periods of high ambient temperatures the hybrid (dry/wet) condenser operating in a wet mode can achieve the same increased turbine performance as an oversized air-cooled condenser or an air-cooled condenser rith adiabatic cooling (spray cooling) of the inlet air at a considerably lower cost. For the same turbine power output the water consumed by an air-cooled condenser incorporating a hybrid (dry/wet) dephlegmator is at least 20% less than an air- cooled condenser with adiabatic cooling of the inlet air. en_ZA
dc.description.sponsorship Sponsored by the Centre for Renewable and Sustainable Energy Studies, Stellenbosch University en_ZA
dc.language.iso en en_ZA
dc.publisher Stellenbosch : Stellenbosch University
dc.subject Dry-cooling en_ZA
dc.subject Dry/wet cooling systems en_ZA
dc.subject Adiabatic cooling en_ZA
dc.subject Hybrid cooling system en_ZA
dc.subject Dissertations -- Mechanical engineering en
dc.subject Theses -- Mechanical engineering en
dc.subject.lcsh Condensers (Steam) en
dc.subject.lcsh Hydronics en
dc.title Performance characteristics of an air-cooled steam condenser incorporating a hybrid (dry/wet) dephlegmator en_ZA
dc.type Thesis en_ZA
dc.rights.holder Stellenbosch University
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