Energy and economic assessments of waste heat recovery by designs of economizer, condensing economizer and air preheater

Meryem Terhan; Emre Özağdaş; Muhammed Arslan Omar

Makale detayları

Energy and economic assessments of waste heat recovery by designs of economizer, condensing economizer and air preheater

Yazarlar:

Meryem Terhan | Emre Özağdaş | Muhammed Arslan Omar

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2521-2536

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287700

pISSN:

1300-1884

Anahtar kelimeler:

Özet:

 In this study, waste heat loss of flue gases from the boilers in Kafkas University district heating system has calculated between 6-8 according to the combustion analysis and annual cost of this heat loss has found as 58,658.79. In terms of energy efficiency and national economy, it has thought that this lost heat should recover as much as possible and fuel and energy savings should be achieved. The effects of variants such as air excess coefficient, flue gas temperature, boiler capacity and fuel consumption on the heat recovery from flue gas have presented in detail. The heat recovery scenarios have presented for reusing this waste energy for the space heating, domestic hot water, preheating combustion air and applicability of these scenarios has been investigated in terms of thermodynamics and economics. In the second scenario examined to cover the domestic hot water need of the guest house building, the energy savings of the scenario will provide during 20 years of economics life is 122,820.83, and it has the highest savings income among the scenarios. In addition, it is possible to recover approximately 50 of the flue gas loss with thanks to the scenario. On the other hand, the third scenario of heating the boiler combustion air with waste heat is the easiest and most economical scenario because its payback period is only one year, and there are no extra excavation and pipe costs.

 In this study, waste heat loss of flue gases from the boilers in Kafkas University district heating system has calculated between 6-8 according to the combustion analysis and annual cost of this heat loss has found as 58,658.79. In terms of energy efficiency and national economy, it has thought that this lost heat should recover as much as possible and fuel and energy savings should be achieved. The effects of variants such as air excess coefficient, flue gas temperature, boiler capacity and fuel consumption on the heat recovery from flue gas have presented in detail. The heat recovery scenarios have presented for reusing this waste energy for the space heating, domestic hot water, preheating combustion air and applicability of these scenarios has been investigated in terms of thermodynamics and economics. In the second scenario examined to cover the domestic hot water need of the guest house building, the energy savings of the scenario will provide during 20 years of economics life is 122,820.83, and it has the highest savings income among the scenarios. In addition, it is possible to recover approximately 50 of the flue gas loss with thanks to the scenario. On the other hand, the third scenario of heating the boiler combustion air with waste heat is the easiest and most economical scenario because its payback period is only one year, and there are no extra excavation and pipe costs.

 In this study, waste heat loss of flue gases from the boilers in Kafkas University district heating system has calculated between 6-8 according to the combustion analysis and annual cost of this heat loss has found as 58,658.79. In terms of energy efficiency and national economy, it has thought that this lost heat should recover as much as possible and fuel and energy savings should be achieved. The effects of variants such as air excess coefficient, flue gas temperature, boiler capacity and fuel consumption on the heat recovery from flue gas have presented in detail. The heat recovery scenarios have presented for reusing this waste energy for the space heating, domestic hot water, preheating combustion air and applicability of these scenarios has been investigated in terms of thermodynamics and economics. In the second scenario examined to cover the domestic hot water need of the guest house building, the energy savings of the scenario will provide during 20 years of economics life is 122,820.83, and it has the highest savings income among the scenarios. In addition, it is possible to recover approximately 50 of the flue gas loss with thanks to the scenario. On the other hand, the third scenario of heating the boiler combustion air with waste heat is the easiest and most economical scenario because its payback period is only one year, and there are no extra excavation and pipe costs.

 Bu çalışmada, Kafkas Üniversitesi, bölgesel ısıtma sistemindeki kazanlardan çıkan baca gazlarının atık ısı kaybının yapılan yanma analizine göre yaklaşık  6-8 arasında ve bu kayıp ısının yıllık giderinin 58.658,79  olduğu hesaplanmıştır. Enerji verimliliği ve ülke ekonomisi açısından bu kayıp enerjinin mümkün olduğunca geri kazanılarak yakıt ve enerji tasarrufu elde edilmesi gerektiği düşünülmektedir. Hava fazlalık katsayısı, baca gazı sıcaklığı, kazan kapasitesi ve yakıt tüketimi gibi değişkenlerin atık baca gazı enerjisinin ısı geri kazanımına olan etkileri detaylıca incelenmiştir. Bu kayıp enerjiden mahal ısıtmasında, sıcak su eldesinde ve kazan yakma havasının ısıtılmasında yararlanılması gibi birkaç ısı geri kazanım yöntemi sunulmuş, bu yöntemlerin uygulanabilirliği termodinamik ve ekonomik açıdan araştırılmıştır. Konukevi binasının sıcak su ihtiyacının karşılanması için incelenen 2. yöntemin 20 yıllık ekonomik ömrü boyunca sağlayacağı enerji tasarrufu 122.820,83  olup yöntemler arasında en yüksek tasarruf gelirine sahiptir. Ayrıca, bu yöntemle baca gazı kaybının yaklaşık 50sini geri kazanmak mümkündür. Buna karşılık kazan yakma havasının atık ısıyla ısıtılması yöntemi, geri ödeme süresinin sadece 1 yıl olması ve ekstra kazı ve boru maliyetlerinin olmaması sebebiyle uygulanması en kolay ve en ekonomik yöntemdir.

Makale detayları

Energy and economic assessments of waste heat recovery by designs of economizer, condensing economizer and air preheater

Yazarlar:

Meryem Terhan | Emre Özağdaş | Muhammed Arslan Omar

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2521-2536

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287700

pISSN:

1300-1884

energy efficiency

heat recovery units

condensing economizer

air preheater

economic analysisenerji verimliliği

ısı geri kazanım üniteleri

yoğuşmalı ekonomizer

hava ön ısıtıcısı

ekonomik analiz

Sayı

Makale detayları

Yazarlar: Meryem Terhan | Emre Özağdaş | Muhammed Arslan Omar

Yayıncı: Gazi University

Ana Başlıklar: Mühendislik

Dergi: Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2521-2536

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: Türkçe

Document ID (Org No.): 2001287700

pISSN: 1300-1884

Sayı

Yazarlar:

Meryem Terhan | Emre Özağdaş | Muhammed Arslan Omar

Yayıncı:

Gazi University

Ana Başlıklar:

Mühendislik

Dergi:

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi Vol.38 Issue 4, pp.2521-2536

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

Türkçe

Document ID (Org No.):

2001287700

pISSN:

1300-1884