THEORETICAL AND EXPERIMENTAL INVESTIGATION OF TRANSPIRED SOLAR AIR COLLECTOR COUPLED TO A HEAT EXCHANGER

Abstract

The transpired solar collector uses the solar energy to preheat ventilation air for buildings and agricultural applications. The thermal performance of transpired collector is depending on solar radiation significantly. In this study, the effectiveness of the transpired solar collector coupled to a capillary heat exchanger as a supplementary heating system has been determined for nonsolar conditions. A theoretical and experimental analysis were carried out regarding perforated solar air collector which is coupled to a capillary heating system. Heat transfer effectiveness between the capillary tubes and the solar collector is investigated experimentally for different conditions such as mass flow rates, inlet temperatures. It has been determined that capillary tube heat transfer efficiency varies between 0,45 and 0,77 for different conditions, and the capillary tube system can be suitable supplementary system for transpired solar collector when the solar radiation is insufficient

Keywords

• Transpired solar air collector, Capillary radiant heating system, Solar air heating

ISI DEĞİŞTİRİCİLİ HAVA SIZDIRMALI GÜNEŞ TOPLAYICILARININ TEORİK VE DENEYSEL İNCELEMESI

Abstract

Hava sızdırmalı güneş toplayıcıları, güneş enerjisini kullanarak, bina ısıtma havalandırması ve kurutma uygulamalarında hava ısıtması yapan sistemlerdir. Hava sızdırmalı güneş toplayıcısının performansı önemli ölçüde güneş ışınım şiddetine bağlıdır. Bu çalışmada, bir tamamlayıcı ısıtma sistemi olarak, kılcal boru ısı değiştiricisi ile desteklenmiş hava sızdırmalı güneş toplayıcısının, güneş ışınımının olmadığı koşullardaki etkinliği belirlenmiştir. Kılcal borulu entegrasyonlu hava sızdırmalı güneş toplayıcısı teorik ve deneysel olarak incelenmiştir. Farklı su debisi, hava debisi ve sıcak su sıcaklıkları için, kılcal borular ile güneş toplayıcısı arasındaki ısı transferi etkinliği deneysel olarak incelenmiştir. Kılcal boru ısı transferi etkinliğinin, farklı koşullar için 0.45 ile 0.77 arasında değiştiği belirlenmiş, güneşin yetersiz olduğu durumlar için kılcal boru sisteminin hava sızdırmalı toplayıcılar için uygun bir tamamlayıcı sistem olabileceği tespiti yapılmıştır

Keywords

• Hava sızdırmalı güneş toplayıcısı, Kılcal borulu radyant ısıtma sistemi, Güneş enerjisi ile hava ısıtma

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