USABILITY OF CONTROL CHARTS TO MONITOR VARIATION OF QUALITY PARAMETERS IN COAL-FIRED THERMAL POWER PLANTS

Yıl 2020, Cilt: 59 Sayı: 4, 247 - 253, 01.12.2020

Ali Can Özdemir

https://doi.org/10.30797/madencilik.845148

Cited By: 1

Öz

During the production of electrical energy from coal-fired thermal power plants, calorific and unit
power values are the most important indicators for evaluating the productivity of the process.
These values are measured periodically, and the resulting measurements are monitored to detect
root causes of variation that may occur in production process. As this application is currently
performed by manual methods, the probability of obtaining incorrect results is quite high. This
study aims to statistically analyze process control on the variation of quality parameters and
detect root causes of unusual variations using Shewhart and cumulative sum control charts. For
this purpose, the usability of these control charts was tested on Afşin-Elbistan B thermal power
plant. As a result, these charts identified fluctuations in the efficiency of generating electrical
energy and unusual variations in the process. Furthermore, it is recommended that these control
charts could be developed and applied in similar type of process.

Anahtar Kelimeler

Statistical process control, Control charts, Calorific value, Unit power

KÖMÜR YAKITLI TERMİK SANTRALLERDE KALİTE PARAMETRELERİNİN DEĞİŞİMİNİN İZLENMESİ İÇİN KONTROL GRAFİKLERİNİN KULLANILABİLİRLİĞİ

Öz

Kömür yakıtlı termik santrallerden elektrik enerjisi üretimi sırasında prosesin verimliliğini
değerlendirmek için kalorifik değer ve birim güç değeri en önemli parametrelerdir. Bu değerler
periyodik olarak ölçülür ve ölçüm sonuçları üretim sürecinde ortaya çıkabilecek dalgalanmaların
temel nedenlerini tespit etmek için izlenir. Bu uygulama mevcut durumda manuel yöntemlerle
gerçekleştirildiğinden, hatalı sonuçların elde edilme olasılığı oldukça yüksektir. Bu çalışma,
Shewhart ve kümülatif toplam kontrol grafiklerini kullanarak kalite parametrelerinin değişimi
üzerindeki proses kontrolünü istatistiksel olarak analiz etmeyi ve olağandışı dalgalanmaların
temel nedenlerini tespit etmeyi amaçlamaktadır. Bu amaçla, bu kontrol grafiklerinin kullanılabilirliği
Afşin-Elbistan B termik santrali üzerinde test edilmiştir. Sonuç olarak, bu grafikler kullanılarak
elektrik enerjisi üretme verimliliğindeki dalgalanmaları ve süreçteki olağandışı değişimler
belirlenmiştir. Ayrıca, bu kontrol grafiklerinin geliştirilmesi ve benzer prosesler için de uygulanması
önerilmektedir.

Anahtar Kelimeler

Enerji verimliliği, İstatistiksel proses kontrol, Kontrol grafikleri, Kalori değeri, Ünite gücü

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