سال انتشار: ۱۳۹۱

محل انتشار: اولین کنفرانس انتقال حرارت و جرم ایران

تعداد صفحات: ۴

نویسنده(ها):

Omid Karimi Sadaghiyani – Associate professor, Islamic Azad university khoy branch
Ali Ardashiri Ahranjani – B.Sc. student, Islamic Azad university khoy

چکیده:

The Monte Carlo ray tracing method is applied and coupled with finite volume numerical methods to study effect of rotation on outlet temperature and heat gain of LS-2 parabolic trough collector (PTC). Based on the effect of sun-shape, the curve of mirror and MCRT method, the heat flux distribution around of evacuated tube is calculated. After simulation the obtained results are compared with Dudley et al test data. In order to validate the numerical method for rotational cases, K.S. Ball’s experimental results are selected. In this work, a plug as a flow restriction is used. In the rotational case studies, the inner wall rotates with various angular speeds. The results of rotational collector are compared with irrotational. Also for these two main states, the location of plug is changed, then, outlet temperature and heat gain of collector are studied. The results show that rotation have positive role on heat transfer processing and the rotational plug in bottom half of tube have better effectual than upper half of tube. Also the contribution of rotation is calculated in the all of case studies. The working fluid in this study is Syltherm-800. The power of wind can be used to rotate tube of collector.