Yerden ısıtma sistemleri için yeni nesil kendiliğinden yayılan hafif kompozit şapın etkinliği üzerine bir analiz

Year 2023, , 168 - 179, 03.10.2023

Şevket Onur Kalkan , Lütfullah Gündüz

https://doi.org/10.47481/jscmt.1273942

Cited By: 1

Abstract

Son yıllarda artan karbon emisyonları ve çevre kirliliği nedeniyle enerji tasarrufu büyük önem taşıyan bir konu haline gelmiştir. Küresel açıdan bakıldığında binaların ısıtılması ve soğutulması için tüketilen enerjinin oldukça yüksek olduğu bilinmektedir. Bu bağlamda araştırmacılar enerji verimliliği konularına büyük önem vermektedirler. Binaların daha verimli ısıtılmasında son yıllarda önem verilen bir konu da yerden ısıtma sistemleridir. Yerden ısıtma sistemleri basitçe döşeme betonu, yalıtım malzemesi, sıcak su boruları ve şaptan oluşan kompozit bir yapıdır. Burada, sıcak su boruları şapın içinde gömülü kaldığından, şapın termal performansı hayati önem taşır. Bu çalışmada, ısıyı kolaylıkla transfer edebilen yeni tip kompozit ve kendiliğinden yayılan şap üretilmiştir. Bu amaçla biri referans (konvansiyonel) şap harcı olmak üzere toplam dokuz farklı şap karışımı hazırlanmıştır. Fiziksel özellikler açısından şap harçlarının akışkanlık, yoğunluk ve basınç dayanımları belirlenmiştir. Isıl özellikler açısından ısıl iletkenlik, özgül ısı, ısıl yayılma ve ısı depolama analizleri yapılmıştır. Çalışmanın ikinci aşamasında ise basit bir yerden ısıtma sistemi kurulmuş ve sistemde dolaşan suyun, suyu taşıyan borunun dış yüzeyinin ve şapın dış yüzeyinin belirli periyotlarda sıcaklıkları ölçülmüştür. Çalışma sonuçlarına göre, bu çalışma kapsamında üretilen şapların ısıl özelliklerine bağlı olarak yerden ısıtma sistemlerinde kullanıldığında sıcak su borularından yüzeye minimum ısı kaybı ile ısı aktarabildiği gözlemlenmiştir.

Keywords

Yerden ısıtma sistemi, kompozit şap harcı, kendiliğinden yayılan şap, termal özellikler, enerji tasarrufu

An analysis of the effectiveness of new generation self-levelling lightweight composite screed for underfloor heating systems

Abstract

Energy saving has become a significant concern in recent years due to increasing carbon emis- sions and environmental pollution. When examined from a global perspective, it is known that the energy consumed for heating and cooling of buildings is relatively high. In this regard, researchers attach great importance to energy efficiency issues. In recent years, an issue that has been given priority in heating buildings more efficiently is underfloor heating systems. Underfloor heating systems are composite structures of slab concrete, insulation material, hot water pipes, and screed. Here, the thermal performance of the screed is vital as the hot water pipes remain embedded in the screed. This study has produced a new composite and self-leveling screed type that can transfer heat easily. For this purpose, nine screed mixtures were prepared, including a reference (nearly conventional) screed mortar. The screed mortars’ flowability, density, and compressive strength were determined regarding physical properties. Thermal properties, thermal conductivity, specific heat, thermal diffusivity, and heat storage analyses were carried out. In the second stage of the study, a basic underfloor heating system was installed, and the temperatures of the water circulating in the system, the outer surface of the pipe carrying the water, and the outer surface of the screed were measured at specific peri- ods. According to the study results, it has been observed that depending on the thermal prop- erties of the screeds produced within the scope of this study, when used in underfloor heating systems, it can transfer heat from the hot water pipes to the surface with minimum losses.

Keywords

Underfloor heating system, composite screed mortar, self-levelling screed, thermal properties, energy saving

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