This article presents the analysis of first and second laws of thermodynamics in a 7.7MW steam power
plant located in Torbali (Izmir, Turkey). It involves a fluidized bed, a waste heat boiler (WHB) and an
economizer as subsystems. Fans, pumps, cyclone and chimney are also considered through the analysis
as auxiliary systems in the thermal plant. The analysis is performed for the whole system and subsystems
by considering the available energy balance. In this analysis which consists of a detailed fluidized bed
coal combustor (FBCC) model, the amount of irreversibilities occurring in the system is calculated at each
location. Analysis results are compared with the test results obtained from the measurements at several
locations in the system and good agreement is observed. These measured values are the temperatures at
three levels in the FBCC and boiler, economizer exit temperatures as well as flue gas composition at the
boiler exit and steam flow rate. The maximum error observed in temperature values and steam flow rate
is about 3.03% and 4.03%, respectively. Through the developed and validated model, effects of excess air
and ambient temperature on first and second law efficiency of the subsystems and overall system are
investigated. The second-law analysis reveals that the FBCC has the largest irreversibility, with about
80.4% of the total system exergy loss. The FBCC temperature, first and second law efficiencies decrease
19.8%, 5.1% and 5.2%, respectively, as the excess air increases from 10% to 70%. Also steam flow rate
decreases 5.1%. As the ambient temperature increases from 25 to 45 C, the FBCC temperature, system
first and second law efficiencies increase 0.8%, 1.3%, and 1.3%, respectively.
2009 Elsevier
This article presents the analysis of first and second laws of thermodynamics in a 7.7MW steam power
plant located in Torbali (Izmir, Turkey). It involves a fluidized bed, a waste heat boiler (WHB) and an
economizer as subsystems. Fans, pumps, cyclone and chimney are also considered through the analysis
as auxiliary systems in the thermal plant. The analysis is performed for the whole system and subsystems
by considering the available energy balance. In this analysis which consists of a detailed fluidized bed
coal combustor (FBCC) model, the amount of irreversibilities occurring in the system is calculated at each
location. Analysis results are compared with the test results obtained from the measurements at several
locations in the system and good agreement is observed. These measured values are the temperatures at
three levels in the FBCC and boiler, economizer exit temperatures as well as flue gas composition at the
boiler exit and steam flow rate. The maximum error observed in temperature values and steam flow rate
is about 3.03% and 4.03%, respectively. Through the developed and validated model, effects of excess air
and ambient temperature on first and second law efficiency of the subsystems and overall system are
investigated. The second-law analysis reveals that the FBCC has the largest irreversibility, with about
80.4% of the total system exergy loss. The FBCC temperature, first and second law efficiencies decrease
19.8%, 5.1% and 5.2%, respectively, as the excess air increases from 10% to 70%. Also steam flow rate
decreases 5.1%. As the ambient temperature increases from 25 to 45 C, the FBCC temperature, system
first and second law efficiencies increase 0.8%, 1.3%, and 1.3%, respectively.
2009 Elsevier
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This article presents the analysis of first and second laws of thermodynamics in a 7.7MW steam power
plant located in Torbali (Izmir, Turkey). It involves a fluidized bed, a waste heat boiler (WHB) and an
economizer as subsystems. Fans, pumps, cyclone and chimney are also considered through the analysis
as auxiliary systems in the thermal plant.การวิเคราะห์การใช้ทั้งระบบและระบบย่อย
โดยพิจารณาสมดุลพลังงานที่ใช้ได้ ในการวิเคราะห์ ซึ่งประกอบด้วยรายละเอียดของเตาเผาฟลูอิไดซ์เบด
ถ่านหิน ( fbcc ) รุ่น จำนวน irreversibilities ที่เกิดขึ้นในระบบจะถูกคำนวณในแต่ละ
ที่ตั้ง การวิเคราะห์เปรียบเทียบกับผลการทดสอบที่ได้จากการวัดหลาย
locations in the system and good agreement is observed. These measured values are the temperatures at
three levels in the FBCC and boiler, economizer exit temperatures as well as flue gas composition at the
boiler exit and steam flow rate. The maximum error observed in temperature values and steam flow rate
is about 3.03% and 4.03%, respectively. Through the developed and validated model,ผลของอุณหภูมิต่อ
อากาศส่วนเกินและแรกและมีประสิทธิภาพกฎข้อที่สองของระบบย่อยและระบบโดยรวมมี
สอบสวน การวิเคราะห์กฎหมายที่สอง พบว่า fbcc มีต่อที่ใหญ่ที่สุดที่มีเกี่ยวกับ
80.4 % ของทั้งหมด ระบบราคาขาดทุน การ fbcc อุณหภูมิ ตัวแรกและตัวที่สองมีกฎหมายลด
19.8 เปอร์เซ็นต์ ร้อยละ 5.1 และ 5.2 ตามลำดับ as the excess air increases from 10% to 70%. Also steam flow rate
decreases 5.1%. As the ambient temperature increases from 25 to 45 C, the FBCC temperature, system
first and second law efficiencies increase 0.8%, 1.3%, and 1.3%, respectively.
2009 Elsevier
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