CH4-CO2 Fuel Mixture Combustion and Emission Characteristics in a Combi Boiler Combustor

Ahmet Haşim Toslak; Halil İbrahim Variyenli; Serhat Karyeyen

Makale detayları

CH4-CO2 Fuel Mixture Combustion and Emission Characteristics in a Combi Boiler Combustor

Yazarlar:

Ahmet Haşim Toslak | Halil İbrahim Variyenli | Serhat Karyeyen

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji ve Yakmada Kimyasal ve Termal Süreçler

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2357-2376

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333526

pISSN:

2147-9429

Anahtar kelimeler:

Özet:

 Biogas can be obtained from agricultural, animal, and waste, replacing natural gas in heating systems. Because of that, studying its combustion characteristics will be valuable. This study investigates biogas combustion characteristics in a natural gas-powered heating system. Various CH4-CO2 biogas fuel mixtures were analyzed experimentally and numerically for a thermal power of 13 and 31 kW. In the experimental part of the study, the fuel mixtures were burned, and the temperature and the NOX were measured. The standard k-ε turbulence model and Eddy Dissipation Concept were used in the present studys numerical part. The model was validated with the measured data. The modeling results are in agreement with the measurements. Various fuel mixtures were then modeled to seek varying inlet temperature and O2 concentration effects on the combustion characteristics of the biogas fuel mixtures studied. It was concluded that as the amount of CO2 in the fuel mixture was increased the flame temperature decreased linearly from about 1900 K to 1775 K. NOx concentrations in the combustion product decreased from about 10 ppm to below 2 ppm. It was also concluded that air preheating and change in O2 concentration in the oxidizer affected the flame temperatures and NOx considerably.

 Biogas can be obtained from agricultural, animal, and waste, replacing natural gas in heating systems. Because of that, studying its combustion characteristics will be valuable. This study investigates biogas combustion characteristics in a natural gas-powered heating system. Various CH4-CO2 biogas fuel mixtures were analyzed experimentally and numerically for a thermal power of 13 and 31 kW. In the experimental part of the study, the fuel mixtures were burned, and the temperature and the NOX were measured. The standard k-ε turbulence model and Eddy Dissipation Concept were used in the present studys numerical part. The model was validated with the measured data. The modeling results are in agreement with the measurements. Various fuel mixtures were then modeled to seek varying inlet temperature and O2 concentration effects on the combustion characteristics of the biogas fuel mixtures studied. It was concluded that as the amount of CO2 in the fuel mixture was increased the flame temperature decreased linearly from about 1900 K to 1775 K. NOx concentrations in the combustion product decreased from about 10 ppm to below 2 ppm. It was also concluded that air preheating and change in O2 concentration in the oxidizer affected the flame temperatures and NOx considerably.

 Biogas can be obtained from agricultural, animal, and waste, replacing natural gas in heating systems. Because of that, studying its combustion characteristics will be valuable. This study investigates biogas combustion characteristics in a natural gas-powered heating system. Various CH4-CO2 biogas fuel mixtures were analyzed experimentally and numerically for a thermal power of 13 and 31 kW. In the experimental part of the study, the fuel mixtures were burned, and the temperature and the NOX were measured. The standard k-ε turbulence model and Eddy Dissipation Concept were used in the present studys numerical part. The model was validated with the measured data. The modeling results are in agreement with the measurements. Various fuel mixtures were then modeled to seek varying inlet temperature and O2 concentration effects on the combustion characteristics of the biogas fuel mixtures studied. It was concluded that as the amount of CO2 in the fuel mixture was increased the flame temperature decreased linearly from about 1900 K to 1775 K. NOx concentrations in the combustion product decreased from about 10 ppm to below 2 ppm. It was also concluded that air preheating and change in O2 concentration in the oxidizer affected the flame temperatures and NOx considerably.

 Tarımsal, hayvansal ve atıklardan elde edilebilen biyogaz, ısıtma sistemlerinde doğal gazın yerini alabilir. Bu nedenle yanma özelliklerini incelemek değerli olacaktır. Bu çalışmada doğal gazla çalışan bir ısıtma sisteminde biyogazın yanma özellikleri araştırılmaktadır. Çeşitli CH4- CO2 biyogaz yakıt karışımları 13 ve 31 kW ısıl güç için deneysel ve sayısal olarak analiz edilmiştir. Çalışmanın deneysel kısmında yakıt karışımları kombide yakılarak sıcaklık ve NOX değerleri ölçülmüştür. Çalışmanın sayısal kısmında standart k-ε türbülans modeli ve Eddy Dissipation Concept kullanılmıştır. Sayısal model deneysel verilerle doğrulandı. Sayısal model ile farklı yakıt karışımları için farklı giriş hava sıcaklıklarının ve O2 konsantrasyonunun etkisi de incelenmiştir. Yakıt karışımındaki CO2 miktarı arttıkça alev sıcaklığının doğrusal olarak yaklaşık 1900 Kden 1775 Kye düştüğü görülmüştür. Yanma ürünündeki NOx konsantrasyonunun yaklaşık 10 ppmden 2 ppmnin altına düştüğü görülmüştür. Ayrıca hava ön ısıtmanın ve oksitleyicideki O2 konsantrasyonu değişiminin alev sıcaklıklarını ve NOx değerini önemli ölçüde etkilediği sonucuna varılmıştır.

Makale detayları

CH4-CO2 Fuel Mixture Combustion and Emission Characteristics in a Combi Boiler Combustor

Yazarlar:

Ahmet Haşim Toslak | Halil İbrahim Variyenli | Serhat Karyeyen

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji ve Yakmada Kimyasal ve Termal Süreçler

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2357-2376

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333526

pISSN:

2147-9429

Biogas

Combustion

Domestic Boiler

CFD

EmissionBiyogaz

Yanma

Kombi

HAD

Emisyon

Sayı

Makale detayları

Yazarlar: Ahmet Haşim Toslak | Halil İbrahim Variyenli | Serhat Karyeyen

Yayıncı: Gazi University

Ana Başlıklar: Enerji ve Yakmada Kimyasal ve Termal Süreçler

Dergi: Politeknik Dergisi Vol.27 Issue 6, pp.2357-2376

Belge Tipi: Makale

Yayın Tarihi: 12/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001333526

pISSN: 2147-9429

Sayı

Yazarlar:

Ahmet Haşim Toslak | Halil İbrahim Variyenli | Serhat Karyeyen

Yayıncı:

Gazi University

Ana Başlıklar:

Enerji ve Yakmada Kimyasal ve Termal Süreçler

Dergi:

Politeknik Dergisi Vol.27 Issue 6, pp.2357-2376

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001333526

pISSN:

2147-9429