Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical study on thermal behaviors of a solar chimney incorporated with PCM
Highlights The thermal behaviors of the solar chimney incorporated with LHS unit have been experimentally and numerically investigated. The numerical results show good agreements with the experimental results. The behaviors of the solar chimney under various heat fluxes are numerically studied.
Abstract The thermal behaviors of a solar chimney incorporating with organic phase change material (PCM) RT-42 unit under different heat fluxes are studied in this paper. For the numerical model, effective heat capacity method is employed to analyze the performance of RT-42, while the average thermo-physical property approach is used to describe the PCM/fins component. The PCM behaviors during its melting and solidification processes, absorber surface temperature, mass flow rate, and inlet and outlet air temperature difference have been investigated. The numerical results give good agreements with the experimental results. The comprehensive investigations under various heat fluxes from 100 to 800W/m2 are carried out by using the verified model. The numerical results show that the performance of the system deteriorates sharply once the heat flux is or lower than 500W/m2, but not big improvement if the heat flux is higher than 700W/m2. Therefore, the performance of the system is highly dependent on the solar radiation. The application of high effective thermal conductivity enhancers can further improve the performance of the chimney under lower solar radiation.
Numerical study on thermal behaviors of a solar chimney incorporated with PCM
Highlights The thermal behaviors of the solar chimney incorporated with LHS unit have been experimentally and numerically investigated. The numerical results show good agreements with the experimental results. The behaviors of the solar chimney under various heat fluxes are numerically studied.
Abstract The thermal behaviors of a solar chimney incorporating with organic phase change material (PCM) RT-42 unit under different heat fluxes are studied in this paper. For the numerical model, effective heat capacity method is employed to analyze the performance of RT-42, while the average thermo-physical property approach is used to describe the PCM/fins component. The PCM behaviors during its melting and solidification processes, absorber surface temperature, mass flow rate, and inlet and outlet air temperature difference have been investigated. The numerical results give good agreements with the experimental results. The comprehensive investigations under various heat fluxes from 100 to 800W/m2 are carried out by using the verified model. The numerical results show that the performance of the system deteriorates sharply once the heat flux is or lower than 500W/m2, but not big improvement if the heat flux is higher than 700W/m2. Therefore, the performance of the system is highly dependent on the solar radiation. The application of high effective thermal conductivity enhancers can further improve the performance of the chimney under lower solar radiation.
Numerical study on thermal behaviors of a solar chimney incorporated with PCM
Li, Yongcai (Autor:in) / Liu, Shuli (Autor:in)
Energy and Buildings ; 80 ; 406-414
19.05.2014
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical study on thermal behaviors of a solar chimney incorporated with PCM
| Online Contents | 2014
| British Library Online Contents | 2019