%0 Journal Article %T A New Approach in Preliminary Design of Closed Loop Solar Thermal Systems (RESEARCH NOTE) %J International Journal of Engineering %I Materials and Energy Research Center %Z 1025-2495 %A Baradaran Rahimi, A. %A Kianifar, A. %D 2002 %\ 11/01/2002 %V 15 %N 4 %P 383-390 %! A New Approach in Preliminary Design of Closed Loop Solar Thermal Systems (RESEARCH NOTE) %K Solar Heating System %K Solar Radiation %K Closed Loop %R %X In this paper, a model for closed loop solar system is presented and an attempt is made to generalize the model to be utilized for primary design of any solar active thermal system. This model may be used for systems in which gas or a liquid are fluids that flow. Two new parameters, namely, the system heat delivery factor and the system heat absorption factor are introduced in the model. These two factors are fully discussed and some equations are developed for their determination. %U https://www.ije.ir/article_71403_e135fa31125f0ec47f7d0f347cf622b2.pdf