COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES

IŞIK, Mehmet Zerrakki; Yumrutas, Recep; Oktay, Hasan

doi:10.22531/muglajsci.631222

COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES

Hasan OKTAY, (Batman Üniversitesi, Makine Mühendisliği, Batman, Türkiye)

Recep YUMRURAŞ, (Gaziantep Üniversitesi, Makine Mühendisliği, Gaziantep, Türkiye)

M. Zerrakki IŞIK (Gaziantep Üniversitesi, Makine Mühendisliği, Gaziantep, Türkiye)

Mugla Journal of Science and Technology

8 1

Yıl: 2020 Cilt: 6 Sayı: 1 Sayfa Aralığı: 18 - 26 Metin Dili: İngilizce DOI: 10.22531/muglajsci.631222 İndeks Tarihi: 29-12-2020

COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES

Öz:

The estimation of the cooling load through the building envelope is an essential task in the selection of proper HVAC system components that influences the building’s performance. For this task, ASHRAE has presented several methods to calculate the building cooling load due to heat gain, such as the total equivalent temperature difference method (TETD), the cooling load temperature difference method (CLTD), and the radiant time series method (RTS). The present study aims to explore the accuracies of those calculation methods in terms of energy efficiency. In this regard, an analytical solution method utilizing Complex Finite Fourier Transform Technique (CFFT) was developed for the calculation of cooling load due to heat gain to compare the temperature differences obtained from the TETD and CLTD methods. Then, a computer program was prepared in MATLAB to perform the calculations based on an analytical methodology. Besides, the estimated CLTD and TETD values by the CFFT were compared with those values presented in the Handbook of the ASHRAE. The calculation results revealed there is a good agreement between the analytical and presented results in the ASHRAE Manual for the selected building envelopes. However, several differences were found between the estimated TETD and CLTD cooling load values and those presented in the Handbook of ASHRAE.

Anahtar Kelime:

FARKLI BİNA YAPI ELEMANLARI İÇİN CLTD VE TETD SOĞUTMA YÜKÜ HESAPLAMA YÖNTEMLERİNİN KARŞILAŞTIRILMASI

Öz:

Bina yapı elemanlarından kaynaklı soğutma yükünün doğru bir şekilde hesaplanması, binanın performansını etkileyen uygun HVAC sistem bileşenlerinin seçiminde önemli bir görevdir. Bu görev için ASHRAE, bina ısı kazancından kaynaklı soğutma yükünü hesaplamak için, soğutma yükü sıcaklık farkı yöntemi (CLTD), toplam eşdeğer sıcaklık farkı yöntemi (TETD) ve radyant zaman serisi yöntemi (RTS) gibi çeşitli yöntemler sunmuştur. Bu çalışma, bu hesaplama yöntemlerinin enerji verimliliği açısından doğruluğunu araştırmayı amaçlamıştır. Bu bağlamda, CLTD ve TETD yöntemlerinden elde edilen sıcaklık farklarını karşılaştırmak için karmaşık sonlu Fourier dönüşüm tekniği (CFFT) kullanılarak ısı kazancından kaynaklı soğutma yükünü hesaplayan analitik bir çözüm yöntemi geliştirilmiştir. Matematiksel çözüme dayalı bir hesaplama yöntemi geliştirilmiş olup, sayısal hesaplamalar için ise Matlab'da bir bilgisayar programı hazırlanmıştır. Bunun yanında, CFFT tarafından hesaplanan CLTD ve TETD değerleri ASHRAE El kitabı tarafından sunulan değerlerle karşılaştırılmıştır. Seçilen bina yapı elemanları için hesaplanan sonuçlar ile ASHRAE tarafından verilen değerler arasında önemli bir uygunluk olduğu görülmüştür. Ayrıca hem hesaplanan hem de ASHRAE El kitabı tarafından sunulan TETD ve CLTD soğutma yükü değerleri arasında çeşitli farklılıklar tespit edilmiştir.

Anahtar Kelime:

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

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APA	Oktay H, Yumrutas R, IŞIK M (2020). COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. , 18 - 26. 10.22531/muglajsci.631222
Chicago	Oktay Hasan,Yumrutas Recep,IŞIK Mehmet Zerrakki COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. (2020): 18 - 26. 10.22531/muglajsci.631222
MLA	Oktay Hasan,Yumrutas Recep,IŞIK Mehmet Zerrakki COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. , 2020, ss.18 - 26. 10.22531/muglajsci.631222
AMA	Oktay H,Yumrutas R,IŞIK M COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. . 2020; 18 - 26. 10.22531/muglajsci.631222
Vancouver	Oktay H,Yumrutas R,IŞIK M COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. . 2020; 18 - 26. 10.22531/muglajsci.631222
IEEE	Oktay H,Yumrutas R,IŞIK M "COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES." , ss.18 - 26, 2020. 10.22531/muglajsci.631222
ISNAD	Oktay, Hasan vd. "COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES". (2020), 18-26. https://doi.org/10.22531/muglajsci.631222

APA	Oktay H, Yumrutas R, IŞIK M (2020). COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. Mugla Journal of Science and Technology, 6(1), 18 - 26. 10.22531/muglajsci.631222
Chicago	Oktay Hasan,Yumrutas Recep,IŞIK Mehmet Zerrakki COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. Mugla Journal of Science and Technology 6, no.1 (2020): 18 - 26. 10.22531/muglajsci.631222
MLA	Oktay Hasan,Yumrutas Recep,IŞIK Mehmet Zerrakki COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. Mugla Journal of Science and Technology, vol.6, no.1, 2020, ss.18 - 26. 10.22531/muglajsci.631222
AMA	Oktay H,Yumrutas R,IŞIK M COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. Mugla Journal of Science and Technology. 2020; 6(1): 18 - 26. 10.22531/muglajsci.631222
Vancouver	Oktay H,Yumrutas R,IŞIK M COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES. Mugla Journal of Science and Technology. 2020; 6(1): 18 - 26. 10.22531/muglajsci.631222
IEEE	Oktay H,Yumrutas R,IŞIK M "COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES." Mugla Journal of Science and Technology, 6, ss.18 - 26, 2020. 10.22531/muglajsci.631222
ISNAD	Oktay, Hasan vd. "COMPARISON OF CLTD AND TETD COOLING LOAD CALCULATION METHODS FOR DIFFERENT BUILDING ENVELOPES". Mugla Journal of Science and Technology 6/1 (2020), 18-26. https://doi.org/10.22531/muglajsci.631222