BİNA ENTEGRELİ FOTOVOLTAİK TERMAL (BIPVT) KOLLEKTÖR VE SİSTEMLERİN ELEKTRİKSEL VERİMLERİNİN TAHMİNİ İÇİN YENİ, PRATİK VE GÜVENİLİR ANALİTİK MODELLER

Abstract

Bina entegreli fotovoltaik termal (BIPVT) kollektörler, cephe ve çatılar gibi bina kabuğunun farklı yerlerinde konvansiyonel bina elemanlarıyla yer değiştirilebilen çok fonksiyonlu ürünlerdir. BIPVT kollektörler binalarda kullanılmak üzere eş zamanlı olarak termal ve elektriksel enerji üretebilen yenilikçi bina kabuk elemanı olarak kullanılırlar. BIPVT kollektörler ve sistemlerin bina sektöründe kullanılan enerjinin azaltılmasındaki kayda değer potansiyeline rağmen, BIPVT kollektörlerin tasarım, işletme ve iklim odaklı performans parametreleri açısından optimize edilmesine yönelik günümüze dek kapsamlı bir teşebbüs olmadığından ötürü, bu sistemler yakın geçmişe kadar sınırlı ölçüde dikkat çekmiştir. Elektriksel verim BIPVT kollektörler için anahtar bir performans parametresidir. Bu bağlamda, farklı tasarım, işletme ve çevresel koşullar altında bu sistemlerin öncül performans değerlendirmesinin yapılmasında BIPVT kollektörlerin elektriksel veriminin kolay, hızlı ve güvenilir bir şekilde belirlenmesi son derece önemlidir. Bu yüzden bu araştırmada, tasarım ve iklimsel parametrelerin bir fonksiyonu olarak BIPVT kollektörlerin elektriksel veriminin tahmini için yenilikçi, pratik ve güvenilir analitik ifadeler geliştirilmektedir. Bu çalışma kapsamında en yaygın BIPVT konfigürasyonu (camdan cama BIPVT kollektör) göz önüne alınmakta ve bu dizayn için analitik ifadeler geliştirilmektedir. Analitik ifadelerin doğruluğu daha önceki literatürde farklı iklimsel koşullar altında gerçekleştirilen deneysel çalışmalar ile doğrulanmaktadır. Sonuçlar, camdan cama BIPVT kollektörlerin elektriksel veriminin önceki literatürle iyi bir uyum içerisinde olduğunu göstermektedir.

Keywords

• BIPVT kollektörler,elektriksel verim,analitik model,ışınım akısı

Novel, Practical and Reliable Analytical Models to Estimate Electrical Efficiency of Building-Integrated Photovoltaic/Thermal (BIPVT) Collectors and Systems

Abstract

Building-integrated photovoltaic/thermal (BIPVT) collectors are multifunctional products that replace conventional building materials in parts of the building envelopes, such as the facades and roofs. BIPVT collectors serve as novel building envelope material that can generate thermal and electrical energy simultaneously to be utilised in buildings. Despite the remarkable potential of BIPVT collectors and systems in mitigating energy consumed in building sector, until recently, they have received only limited attention since there has been no comprehensive attempt to date to optimise BIPVT collectors in terms of design, operation and climate oriented performance parameters. Electrical efficiency is a key performance parameter for BIPVT collectors. In this respect, easy, fast and reliable determination of electrical efficiency of BIPVT collectors is of vital importance for preliminary performance assessment of this technology under various design, operational and environmental conditions. Therefore in this research, novel, practical and reliable analytical expressions are developed to estimate electrical efficiency of air type BIPVT collectors as a function of design and climatic parameters. The most common configuration of BIPVT collectors (glass to glass BIPVT collector) is considered within the scope of this study, and analytical expressions are developed for this design. The accuracy of the analytical expressions is verified through previous experimental works in literature conducted under different climatic conditions. The results indicate that the electrical efficiency of glass to glass BIPVT collector is in good accordance with previous literature. 

Keywords

• BIPVT collectors,electrical efficiency,analytical model,solar intensity

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