این پژوهش یک مدل هندسی ساده و در عین حال کاربردی برای ارزیابی اثر سایه بر مقدار تابش دریافتی سامانه های فتوولتائیک حرارتی ارائه می دهد؛ در این روش، اثر سایه با تفکیک تابش مستقیم و پراکنده مدل سازی شده است؛ به طوری که ناحیه سایه به عنوان نقاط فاقد تابش مستقیم تعریف شده و ضریب تابش مستقیم بر اساس نسبت مساحت در معرض تابش بهکل سطح سامانه به دست می آید. همچنین ضریب تابش پراکنده با استفاده از ضریب دید سامانه به سایه انداز، سهم تابش آسمان را محاسبه می نماید. سادگی روابط هندسی به کار رفته، امکان برآورد سریع و در عین حال دقیق تابش دریافتی را فراهم می سازد و مدل را برای تحلیل های مهندسی در شرایط مختلف سایه اندازی، بدون محدودیت در ابعاد یا موقعیت سایه انداز، مناسب می کند. برای ارزیابی عملکرد مدل، نتایج حاصل از مدل پیشنهادی با حل یک نمونه عددی با داده های منابع معتبر مقایسه شد. این مقایسه نشان می دهد که میانگین اختلاف مطلق برابر با 11 درصد است. مشخص گردید مدل پیشنهادی دارای عملکرد بهتری نسبت به مدل تحلیلی مورد قیاس بوده و می تواند به عنوان ابزاری کارآمد جهت برآورد تابش دریافتی سامانه های فتوولتائیک حرارتی یکپارچه در ساختمان مورد استفاده قرار گیرد.
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