بررسي عددي عملكرد سيستم‌هاي تهويه بازيابي انرژي با شكل غشاء جديد همراه با انتقال جرم و حرارت

Numerical study of the performance of energy recovery ventilation systems with a new membrane shape coupled with heat and mass transfer

مبدل حرارتي بر اساس غشاء وسيله‌اي براي بازيابي حرارت و رطوبت از هواي خروجي داخل ساختمان است. در اين مقاله به منظور تشديد انتقال حرارت و جرم و كاهش افت فشار، از ساختارهاي جديدي براي غشاء اين مبدل‌ها استفاده شده است. مدلسازي شامل مكانيزم انتقال حرارت و جرم براي جريان آشفته است. نتايج اين پژوهش نشان مي دهند، غشاء خميده با پروفيل نيم‌ دايره باعث افزايش انتقال حرارت و جرم در حدود 7% و 6% و غشاء انحنادار باعث بهبود افت فشار تا حدود 50% نسبت به مبدل‌ حرارتي مثلثي مي‌شوند.

Air-conditioning is used in many commercial buildings and houses today and the energy required for the air conditioning system can be very high in extreme conditions. In this paper, for the purpose of intensifying heat and mass transfer and reducing the pressure drop, new structures for the membrane of these converters have been used; these structures include a curved membrane with a semicircular profile and a curved membrane with convex surfaces. This paper analyzes the numerical study of new membrane such as curvature and circular, using COMSOL Multiphysics. Modeling involves the transfer of heat and mass for turbulent flow. The pressure drop, the average Nsult number and Sherwood calculated and correlated with different reynolds. The results of this study show that the curved membrane with a semicircular profile increases the heat and mass transfer by about 7% and 6%, and the curved membrane improves the pressure drop by about 50% compared to the triangular heat exchanger.