蒸汽冷却器连接方式对热力系统经济性影响分析

Analysis of the Effects of the Different Connecting Modes of Steam Cooler on Thermal System Economic Benefit

现代大容量火电机组都采用加装蒸汽冷却器的方法来强化回热效果。首先计算了内置式蒸汽冷却器的热经济性。在此基础上分析计算了采用外置串联式和并联式蒸汽冷却器方案对热力系统热经济性影响。分析了蒸汽冷却器不同连接方式下热力系统的热经济性,以及过热度对热力系统的热经济性指标的影响。为回热系统优化改造提供了理论依据,具有实际的应用价值。

To improve the effects of regenerative system, a system of steam cooler is designed in modern large capacity unit.The thermal system economic benefit of internal type is analyzed at first in this paper.And on the basis The thermal system economic benefit of exteriorization series connection type and exteriorization parallel connection type are calculated.This paper dis- cusses the effects of the different connecting modes of steam cooler on thermal system economic benefit and the effects of superheat on thermal system economic benefit.The analyzed result provides theoretical basis for regenerative system optimal modification and enhances unit thermal economy.The analyzed result can be helpful to the actual appliance.