摘要
以某电厂亚临界600MW火电机组及其海水淡化系统为例,基于热力学基本原理研究了机组热力系统以及海水淡化系统的能耗特性,构建了基于质量单元的电-水热耗分摊模型和海水淡化热力成本计算模型,并以机组运行负荷、海水淡化系统的造水比、煤价等作为敏感元素,进行了敏感性分析.结果表明:在联产抽汽量一定时,淡化水的成本随着机组负荷的降低而增加;在负荷一定时,淡化水的成本随着抽汽量的增加而降低,但变化幅度不大;海水淡化造水的总成本随着标准煤单价的提高而增加,且标准煤单价对造水成本的影响较大;造水比对淡化水的热力成本影响较大,不同负荷下淡化水热力成本随着造水比的增大而急剧降低.
Taking a 600 MW subcritical thermal power unit and its seawater desalination system as an ob ject of study, the energy consumption characteristics were investigated based on basic thermodynamic prin ciples, while a power-water heat consumption allocation model and a seawater desalination thermal cost calculation model established based on mass unit, and a sensitivity analysis carried out by taking the unit load, water generation ratio and coal price as the sensitive elements. Results show that for a fixed amount of steam extraction, the seawater desalination cost increases with reducing unit load; for a fixed unit load, the seawater desalination cost decreases slightly with rising amount of steam extraction; the total cost of water production by seawater desalination increases significantly with growing unit price of standard coal; the water generation ratio has a relatively great influence on the thermal cost of seawater desalination, which reduces significantly with the rise of water generation ratio at different loads.
出处
《动力工程学报》
CAS
CSCD
北大核心
2013年第4期303-308,共6页
Journal of Chinese Society of Power Engineering
关键词
火电机组
海水淡化系统
热力成本
造水比
能耗
thermal power unit
seawater desalination system
thermal cost
water generation ratio
ener-gy consumption
作者简介
陈海平（1963-），男，内蒙古托克托人，教授，博士，主要从事火力发电厂热力系统节能技术及多联产能源技术等方面的研究．电话（Tel．）：010-61772961；E-mail：hdchenhaiping@163．com．
