A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS

KOCA, Ali İhsan; ÇETİN, Gürsel; VELİŞAN, Eser

A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS

Ali İhsan KOCA, (Fatih Sultan Mehmet Vakıf Üniversitesi, Mühendislik Fakültesi, 34445 İstanbul, Türkiye)

Gürsel ÇETİN, (Mir Araştırma ve Geliştirme A.S., 34220 Istanbul, Turkey)

Eser VELİŞAN (Mir Araştırma ve Geliştirme A.S., 34220 Istanbul, Turkey)

Isı Bilimi ve Tekniği Dergisi

2 0

Yıl: 2017 Cilt: 37 Sayı: 2 (40. Yıl Özel Baskı) Sayfa Aralığı: 75 - 88 Metin Dili: İngilizce İndeks Tarihi: 20-12-2018

A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS

Öz:

In this study we proposed a new modified New Degree-Day Method (NDDM) for the optimization ofinsulation thickness of the wall where the radiant panels are mounted (WMRP) in which heat generation inside thewall is considered. The existing Standard Degree-Day Method (SDDM) is not applicable to estimate the optimuminsulation thickness for the buildings where the WMRP is mounted. Because SDDM method uses indoor airtemperature as a base temperature, hence heat generation through the WMRP cannot be taken into account. In thenew method, important parameters were obtained from the series of the CFD analysis for different thermaltransmittance coefficient (U) and outdoor air temperature (To) values are used to create an empirical equation for theestimation of Tp (new base temperature) with the multiple polynomial regression method. Then the numerical resultswere validated with experimental results which were obtained from the real-size test chamber. Using the new methodoptimum insulation thickness, net energy saving and payback periods for radiant wall heating systems were calculated(for Istanbul climate) and compared with the results which were obtained using the standard degree-day method(SDDM). The results showed that, the SDDM significantly lower (85-95%) estimates the optimum insulationthickness and can’t be used for the buildings where the WMRP is used. The new method can be used for radiant wallheating systems where the performance of radiant heating systems is significantly affected by the insulationcapabilities and has a great importance in the sizing process of the radiant systems.Keywords: Radiant wall heating; Optimum insulation thickness; New degree-day method.

Anahtar Kelime:

Konular: Termodinamik

IŞINIMLA DUVARDAN ISITMA SİSTEMLERİNDE YALITIM KALINLIĞI OPTİMİZASYONUNDA KULLANILABİLECEK YENİ BİR YÖNTEM

Öz:

Bu çalışmada ışınım ısıtma panellerin kullandığı duvarlardaki yalıtım kalınlığının optimizasyonu için, duvarlardaki ısı üretimini dikkate alan, yeni bir derece-gün yöntemi (NDDM) geliştirilmiştir. Standard Derece-Gün Yöntemi (SDDM) temel sıcaklık olarak mahal hava sıcaklığını dikkate almakta ve duvara monte edilmiş ışınım panellerindeki ısı üretimini dikkate alamamaktadır. Bu yüzden standart yöntem ile ışınım panellerin bulundugu duvarlar için yalıtım kalınlığı optimizasyonu yapmak imkansızdır. Önerilen yeni metotta kullanılan yeni temel sıcaklık değerinin (Tp) elde edilmesinde kullanılan ampirik ifade (3. dereceden polinom) farklı yapı ısı geçirgenlik katsayısı (U) ve farklı dış hava sıcaklıkları (To) parametreleri için sayısal analizlerden elde edilmiştir. Daha sonra sayısal çalısmaların sonuçları aynı şartlarda yürütülen gerçek ölçekli deney sisteminde doğrulanmıştır. İstanbul iklim şartları için yeni yöntem ve eski yontem kullanılarak ideal yalıtım kalınlıkları, enerji tasarrufları ve geri dönüş süreleri hesaplanmış, iki yöntemden elde edilen sonuçlar kıyaslanmiştir. Sonuçlara göre eski yöntemle hesaplanan ideal yalıtım kalınlığı yeni yöntemden elde edilen değerin çok altında (%85-95) kalmaktadır. Bu yüzden standart yöntemin ısı üretimi olan duvarlarda kullanılmasının mümkün olmadığı görulmüştür. Önerilen yeni yöntem ise, ışınımla ısıtma sistemlerinin projelendirilmesinde önemli bir kriter olan ısı kayıplarının hesaplanması ve ideal yalıtım kalınlığının belirlenmesinde kullanılabilecektir.

Anahtar Kelime:

Konular: Termodinamik

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	KOCA A, ÇETİN G, VELİŞAN E (2017). A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. , 75 - 88.
Chicago	KOCA Ali İhsan,ÇETİN Gürsel,VELİŞAN Eser A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. (2017): 75 - 88.
MLA	KOCA Ali İhsan,ÇETİN Gürsel,VELİŞAN Eser A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. , 2017, ss.75 - 88.
AMA	KOCA A,ÇETİN G,VELİŞAN E A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. . 2017; 75 - 88.
Vancouver	KOCA A,ÇETİN G,VELİŞAN E A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. . 2017; 75 - 88.
IEEE	KOCA A,ÇETİN G,VELİŞAN E "A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS." , ss.75 - 88, 2017.
ISNAD	KOCA, Ali İhsan vd. "A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS". (2017), 75-88.

APA	KOCA A, ÇETİN G, VELİŞAN E (2017). A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. Isı Bilimi ve Tekniği Dergisi, 37(2 (40. Yıl Özel Baskı)), 75 - 88.
Chicago	KOCA Ali İhsan,ÇETİN Gürsel,VELİŞAN Eser A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. Isı Bilimi ve Tekniği Dergisi 37, no.2 (40. Yıl Özel Baskı) (2017): 75 - 88.
MLA	KOCA Ali İhsan,ÇETİN Gürsel,VELİŞAN Eser A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. Isı Bilimi ve Tekniği Dergisi, vol.37, no.2 (40. Yıl Özel Baskı), 2017, ss.75 - 88.
AMA	KOCA A,ÇETİN G,VELİŞAN E A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. Isı Bilimi ve Tekniği Dergisi. 2017; 37(2 (40. Yıl Özel Baskı)): 75 - 88.
Vancouver	KOCA A,ÇETİN G,VELİŞAN E A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS. Isı Bilimi ve Tekniği Dergisi. 2017; 37(2 (40. Yıl Özel Baskı)): 75 - 88.
IEEE	KOCA A,ÇETİN G,VELİŞAN E "A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS." Isı Bilimi ve Tekniği Dergisi, 37, ss.75 - 88, 2017.
ISNAD	KOCA, Ali İhsan vd. "A NEW METHOD FOR THE OPTIMIZATION OF INSULATION THICKNESS FOR RADIANT WALL HEATING SYSTEMS". Isı Bilimi ve Tekniği Dergisi 37/2 (40. Yıl Özel Baskı) (2017), 75-88.