摘要
基于膜状冷却热、质传递机理,建立水膜薄层的速度分布,热、质传递方程和潜热蒸发冷却控制的数学模型.结合特定时间段内气候条件、冷水机组负荷和运行工况,通过测算制冷系数、冷却水和空气参数,进行质量和热量衡算.分析空气返混现象及冷却塔并联运行对塔性能的影响,采用湿度计分析法分析潜热蒸发为主的热、质传递过程,由冷却塔蒸发冷却效率和效能的计算结果表明,它们系同一表征冷却塔性能的参数.
Based on the theory of heat and mass transfer for film type cooling, a mathematical model for the velocity distribution of a thin water film, the equations of mass and heat transfer, and evaporation cooling controlled by the latent heat transfer were established. Combined with the climatic conditions, chiller load and operating conditions at specific time＇s duration, the coefficient of performance, the equations of mass and heat transfer, and the parameter of cooling water and air were tested and calculated. The influence of tower performance on phenomena of drift back mixing and parallel operation of the cooling tower was analyzed. The psychrometric analysis was used to analyse heat and mass transfer process in which the latent heat transfer was predominant. Results show that the evaporative cooling efficiency and effectiveness were the same parameter for cooling tower performance.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2008年第1期29-34,共6页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(50471108,50371158)
深圳大学科研基金资助项目(200751)
关键词
膜状冷却
热量衡算
潜热蒸发
湿度计分析法
热效率
film type cooling
heat balance
latent heat evaporation
psychrometric analysis
thermal efficiency
