Determining non-linear characteristics of a concentrating solar collector according to the experiment design

7th European Thermal-Sciences Conference

Nem, M.^1 ; Kasperski, J.^1

Wroclaw University of Technology, Faculty of Mechanical and Power Engineering, Wybrzeze Wyspianskiego 27, Wroclaw

50-370, Poland^1

关键词: Concentrating solar;    Experiment design;    Experimental research;    Factorial design;    Heat accumulation;    Nonlinear characteristics;    Quadratic polynomial;    research methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032107/pdf
DOI  :  10.1088/1742-6596/745/3/032107

来源: IOP

【 摘 要 】

A linear concentrating solar air collector with internal multiple-fin array was built. The collector was designed as an air heater for the system of house heating with an all-year-round heat accumulation. In order to conduct transient type numerical simulations of the yearlong work cycle of the system, it was necessary to know the working characteristic of the solar collector. To determine the characteristics, some factors for experimental research were selected. The authors decided to conduct experimental research on the basis of fractional 3kfactorial design for three factors. A set-up was built and then, a series of experiments were conducted according to the adopted experiment design. A working characteristic in the form of a quadratic polynomial was determined, and a diagram was prepared. The obtained results were then discussed. The obtained research method and the determined formula met the needs of further numerical modelling of the year-long work of the heating system containing the examined solar collector.