The represent paper will study the performance of the power plant with the combination of dry and wet cooling systems in different operating conditions. A thermodynamic performance analysis of the steam cycle system w...The represent paper will study the performance of the power plant with the combination of dry and wet cooling systems in different operating conditions. A thermodynamic performance analysis of the steam cycle system was performed by means of a program code dedicated to power plant modeling in design operating condition. Then the off-design behavior was studied by varying not only the ambient temperature and relative humidity but also several parameters connected to the cooling performance, like the exhaust steam flow rate, the air cooling fan load and the number of operating cooling water pumps and cooling towers. The result is an optimum set of variables allowing the dry and wet cooling system be regulated in such a way that the maximum power is achieved and low water consumption.展开更多
Based on the analysis of air flow and heat transfer in the dry-cooling towerfor Harmon system, a combined iteration method is presented to solve the coupled heat transfer anddraft equations derived from theoretical an...Based on the analysis of air flow and heat transfer in the dry-cooling towerfor Harmon system, a combined iteration method is presented to solve the coupled heat transfer anddraft equations derived from theoretical and empirical formulas, with the size of the exchangers andthe cooling tower or the systematic parameters being determined. Taking the 686 MW unit as anexample, the present calculating results are well agreed with those of the real case, and thus themethod presented is practical and feasible for reasonable design of Harmon system.展开更多
文摘The represent paper will study the performance of the power plant with the combination of dry and wet cooling systems in different operating conditions. A thermodynamic performance analysis of the steam cycle system was performed by means of a program code dedicated to power plant modeling in design operating condition. Then the off-design behavior was studied by varying not only the ambient temperature and relative humidity but also several parameters connected to the cooling performance, like the exhaust steam flow rate, the air cooling fan load and the number of operating cooling water pumps and cooling towers. The result is an optimum set of variables allowing the dry and wet cooling system be regulated in such a way that the maximum power is achieved and low water consumption.
基金This project is supported by Main Project in Shanghai for the Combination of New technology and Production(No.9120902)Selected from Proceedings of 2000 the First International conference on Mechanical Engineering
文摘Based on the analysis of air flow and heat transfer in the dry-cooling towerfor Harmon system, a combined iteration method is presented to solve the coupled heat transfer anddraft equations derived from theoretical and empirical formulas, with the size of the exchangers andthe cooling tower or the systematic parameters being determined. Taking the 686 MW unit as anexample, the present calculating results are well agreed with those of the real case, and thus themethod presented is practical and feasible for reasonable design of Harmon system.
