Thermodynamıc investigation of parabolic solar collector with thermal energy storage

Öz

Nowadays, the interest in renewable energy sources is rapidly increasing in order to meet the increasing energy demand without harming the environment. In this study, the energy and exergy performances of a parabolic solar collector (PTC) planned to be installed in Isparta province are investigated. A thermal energy storage (TES) unit is integrated into the system to compensate for the intermittent nature of solar energy. Energy and exergy efficiencies are evaluated by mathematical modeling and thermodynamic analysis. In the study, the 23rd day of July, 2023 was selected and the maximum irradiance on this day was determined as 1050 W/m2. Energy efficiency was calculated as 47.1% and exergy efficiency as 16.68%. It was also found that the tank volume showed the best performance at a volume of 2 m3 and the tank temperature was 135.3 ℃. The effect of radiation intensity on energy efficiency is supported with graphs and it is shown that the proposed system offers a suitable solution for Isparta province.

Anahtar Kelimeler

• Solar energy
• energy efficiency
• exergy efficiency
• renewable energy source
• thermal storage

Termal enerji depolamalı parabolik güneş kolektörünün termodinamik incelenmesi

Öz

Günümüzde artan enerji ihtiyacını çevreye zarar vermesen karşılamak için yenilenebilir enerji kaynaklarına olan ilgi hızla artmaktadır. Bu çalışmada, Isparta ilinde kurulması planlanan bir parabolik güneş kolektörünün (PTC) enerji ve ekserji performansları incelenmiştir. Güneş enerjisinin kesintili yapısını dengelemek amacıyla sisteme bir termal enerji depolama (TES) birimi entegre edilmiştir. Matematiksel modelleme ve termodinamik analizler ile enerji ve ekserji verimlilikleri değerlendirilmiştir. Çalışmada, 2023 yılı Temmuz ayının 23. günü seçilmiş ve bu günde maksimum ışınım şiddeti 1050 W/m2 olarak belirlenmiştir. Enerji verimliliği %47.1 ve ekserji verimliliği ise %16.68 olarak hesaplanmıştır. Tank hacminin de en iyi performansı 2 m3 hacimde gösterdiği ve tank sıcaklığının 135.3 ℃ olduğu tespit edilmiştir. Işınım şiddetinin enerji verimliliği üzerindeki etkisi grafiklerle desteklenmiş ve önerilen sistemin Isparta ili için uygun bir çözüm sunduğu ortaya konulmuştur.

Anahtar Kelimeler

• Güneş Enerjisi
• Enerji Verimliliği
• Ekserji verimliliği
• Yenilenebilir Enerji Kaynağı
• Termal Depolama

Kaynakça

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