Numerical Analysis of New Type Composite Insulation Materials for Cooling Panels

Yıl 2020, Cilt: 35 Sayı: 3, 647 - 658, 30.09.2020

Mustafa Kılıç Mehmet Yanardağ

https://doi.org/10.21605/cukurovaummfd.846390

Öz

Energy saving is an important problem area in heating and cooling systems. Reducing heat loss from cooling panels is crucial for reducing operating cost, increasing system efficiency and energy saving. For his reason in this paper, the thermal performance of new type of insulation materials for an industry cold storage is numerically investigated for different configurations. Two different solution methods are used. For the first method, insulation materials are used in layers in three different configurations. For the second method, thermal performance of PU based homogeneous composite insulation materials is numerically investigated. Ansys Fluent 19.3 CFD program is used for numerical analysis. As a result; using Magpan-PU composite insulation material (configuration-2) causes a reduction of 9.3% on heat loss according to the reference PU foam (configuration -1). For comparing PU based homogeneous composite insulation materials, using 5% doped silica aerogel PU causes an increase of 19.9% on the thermal performance of insulation material and using 1% doped nano-clay PU causes a decrease of 9.8% on the thermal performance of insulation material. It is determined that model results can represent the physical process and can be used for modeling different type of insulation materials for different parameters.

Anahtar Kelimeler

Energy saving, Insulation material, Composite structure, Numerical modelling

Soğutma Panellerinde Kullanılabilecek Yeni Tip Kompozit Yalıtım Malzemelerin Sayısal İncelenmesi

Öz

Enerji tasarrufu, ısıtma ve soğutma sisteminde karşılaşılan en önemli problem sahalarından birisidir. Soğutma panellerinde ısı kaybının azaltılması; işletme maliyetinin azaltılması, sistem veriminin arttırılması ve enerji tasarrufu açısından büyük öneme sahiptir. Bu sebeple bu çalışmada; bir endüstriyel soğuk hava deposunun soğutma panelinde kullanılabilecek yeni tip yalıtım malzemelerinin farklı konfigürasyonlar için ısıl performansı sayısal olarak incelenmiştir. Çalışmada iki farklı çözüm yaklaşımı incelenmiştir. Birinci yaklaşımda; yalıtım malzemeleri tabakalar halinde kullanılmış ve üç farklı konfigürasyon oluşturulmuştur. İkinci yaklaşımda; poliüretan (PU) esaslı homojen yapılı kompozit yalıtım malzemelerinin ısıl performansı incelenmiştir. Sayısal çalışmada; Ansys Fluent 19.3 Hesaplamalı Akışkanlar Dinamiği programı kullanılmıştır. Sonuç olarak; Magpan-PU tabakalı yapısının (Konfigürasyon-2), yalnızca PU köpük kullanılma durumuna (Konfigürasyon-1) göre ısı kaybında %9,3’lük bir azalmaya sebep olduğu belirlenmiştir. Poliüretan esaslı homojen yapılı kompozit yalıtım malzemeleri karşılaştırıldığında ise; %5 Silika aerojel katkılı PU köpük malzemenin, yalnızca PU köpük malzeme kullanılması durumuna göre ısıl performansında %19,9 artış gösterdiği, %1 nanokil içeren PU köpük malzeme kullanılma durumunda ise, ısıl performansında %9,8 azalma tespit edilmiştir. Model sonuçlarının, fiziksel durumu iyi bir şekilde temsil edebildiği, homojen yapıyı farklı tip yalıtım malzemelerinin modellenmesinde farklı parametreler için kullanılabileceği değerlendirilmiştir.

Anahtar Kelimeler

Enerji tasarrufu, Yalıtım malzemesi, Kompozit yapı, Sayısal Modelleme

Kaynakça

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