Critical impact factors on the cooling performance design of natural draft dry cooling tower and relevant optimization strategies. (25th May 2019)

• Record Type: Journal Article
• Authors: Ge, Wenjing; Fan, Jun; Liu, ChuanXiao; Li, Wendong; Chen, Guangan; Zhao, Yuanbin
• Is Part Of: Applied thermal engineering. Volume 154(2019)
• Page Start: 614
• Page End: 627
• Publication Date: 2019-05-25
• Subjects: Natural draft dry cooling tower -- Cooling performance -- Optimal design -- Orthogonal analysis -- Critical factors; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2019.03.008
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: An optimal design for NDDCT is presented and its feasibility is verified. Critical impact factors on cooling performance of NDDCT are clarified. Orthogonality analysis and theoretical analysis method are used. Critical factors' impacts are analyzed and optimization strategies are proposed. A NDDCT is optimized with better cooling performance and lower construction cost. Abstract: Because of the inherent water saving merit, natural draft dry cooling towers (NDDCTs) were widely used by power units in arid regions. The cooling performance of NDDCT plays an important role in the economic and safe running of power units. Then, the design of NDDCTs should be optimized from the design stage. Considering the following factors, such as the tower shape, the radiator arrangement, the ambient crosswind, and the mass flow ratio of circulating water to exhausting steam ( m ), an optimization model was put forward based on theoretical analyses. Through orthogonality analysis, two critical tower shape factors were selected, which were the ratio of the tower height to its bottom diameter and the ratio of the tower throat area to its bottom shell area. Combining the number of cooling column and m, the cooling performance of NDDCTs was optimized and relevant strategies were proposed. Meanwhile, the height of tower was optimized and the minimum construction cost of NDDCT was obtained with optimized cooling performance.