The concept of repowering existing power plants has been recently revalued, in the light of the increasing energy needs,
combined with the cost and the difficulty in developing new generating capacity. Among technologies for existing steam power
plants, feedwater repowering is considered one of the less-intrusive and cost-effective option to expand capacity, improve
efficiency and reduce the pollutants emissions. This paper aims to evaluate the effects of feedwater repowering operating
conditions on energy, environmental and economic system performances. Considering a 600 MW coal fired power plant as a
study case, two feedwater repowering configurations are investigated. In the first case, a simple throttling of high pressure
regenerative steam extractions is operated; in the second configuration, the feedwater upstream the boiler inlet is partially
preheated using the waste heat of an additional gas turbine. In both cases, a characteristic plane is introduced for comparing
energy, economic and environmental performances of feedwater repowering options, at different condenser overloads and fossil
boiler modes of operation.
The concept of repowering existing power plants has been recently revalued, in the light of the increasing energy needs,
combined with the cost and the difficulty in developing new generating capacity. Among technologies for existing steam power
plants, feedwater repowering is considered one of the less-intrusive and cost-effective option to expand capacity, improve
ประสิทธิภาพและลดมลพิษมลพิษ บทความนี้มีวัตถุประสงค์เพื่อศึกษาผลของ feedwater repowering ปฏิบัติการ
เงื่อนไขในการแสดงระบบพลังงาน สิ่งแวดล้อม และเศรษฐกิจ พิจารณาถ่านหิน 600 MW โรงไฟฟ้าเป็น
กรณีศึกษาสอง feedwater repowering ค่าที่ถูกตรวจสอบ ในกรณีแรก ง่าย ๆบีบรัดของ
แรงดันสูงregenerative steam extractions is operated; in the second configuration, the feedwater upstream the boiler inlet is partially
preheated using the waste heat of an additional gas turbine. In both cases, a characteristic plane is introduced for comparing
energy, economic and environmental performances of feedwater repowering options, at different condenser overloads and fossil
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