摘要
为实现油田站场供能系统的节能降耗,将太阳能资源和地热资源进行耦合,构建了混合式发电-供热系统,系统以高压汽轮机、低压汽轮机和有机朗肯汽轮机为发电单元,分析了设计工况和无太阳能工况下的各项参数,对不同参数变化下的系统净输出功率、热效率和[火用]效率变化情况进行分析,最后对系统进行经济性评价。结果显示,设计工况下的净输出功率为105.9k W,热效率为12.57%,[火用]效率为27.62%;无太阳能工况下的净输出功率为23.4 kW,热效率为8.04%,[火用]效率为31.05%;地热水流量越大、温度越大,系统净输出功率和[火用]效率越大;应用该系统后,每年可发电84×10^(4)kWh,多余电力可输送至其余站场使用,同时冷凝器通过冷却水降温,并将升温后的冷却水用于加热站内原油,减少站内用热负荷约50 kW。
In order to achieve energy conservation and consumption reduction of energy supply system of oilfield station,the hybrid power generation and heating system is constructed by coupling solar energy resources and geothermal resources.The system uses high pressure steam turbine,low pressure steam turbine and organic Rankine steam turbine as power generation units,and analyzes various parameters under design conditions and no solar energy conditions.The changes of net output power rate,thermal efficiency and exergic efficiency in the system under different parameters are analyzed,and finally the economic evaluation of the system is carried out.The results show that the net output power rate under design working conditions is 105.9 kW,the thermal efficiency is 12.57%,the exergic efficiency is 27.62%.In the absence of solar energy,the net output power rate is 23.4 kW,the thermal efficiency is 8.04%,the exergic efficiency is 31.05%.The greater the geothermal water flow and temperature are,the greater the net work output and exergic efficiency of system are.After the application of system,the annual power generation can be 84×10^(4)kWh,and the excess power can be transported to other stations for use.At the same time,the condenser is cooled by cooling water,and the heated cooling water is used to heat the crude oil in the station,reducing the heat load in the station about 50 kW.
作者
董莹莹
DONG Yingying(NO.7 Oil Production Production of Daqing Oilfield Co.,Ltd.)
出处
《石油石化节能与计量》
2025年第7期94-98,共5页
Energy Conservation and Measurement in Petroleum & Petrochemical Industry
关键词
太阳能
地热
净输出功率
热效率
[火用]效率
solar energy
geothermal
net output power rate
thermal efficiency
exergic efficiency
