Study of solar energy floor heating system

Abstract

A solar energy floor heating system was performed using all-glass evacuated tube collectors with U-tube and aluminum fin in Yang Fan town, Beijing. The total area of floor heating system is around 640m2 including exhibited hall and office area. The contour aperture area of solar collector system is about 164m2 and the booster is used by electrical element of 36kW. The system was co-designed by Tsinghua Solar Ltd. and KLOBEN, Italy. This paper introduced the system's components, operating principle, thermostatic water supply project and its tracking test. The temperature of the exhibition hall with floor heating was set up at 16 °C. 51.039kWh of the floor heating system was consumed with water cycle operating temperature under 45 °Cduring the period of time between Jan. 1, 2004 and Mar. 15, 2004. 30.257kWh was obtained by the solar collector system. The office room temperature was set up at 16 °C as well. 39.785kWh of the floor heating system was consumed with water cycle operating temperature under 45 °C between Nov. 23, 2006 and Feb. 13, 2007. 32.836kWh was obtained by the solar collector system. The experimental results showed that solar fraction of the floor heating of the exhibition hall and office is 59% and 83%, respectively.