Article ID Journal Published Year Pages File Type
8122887 Sustainable Energy Technologies and Assessments 2017 16 Pages PDF
Abstract
Optimization of configuration parameters based on the steady state convective heat transfer coefficient and friction factor for air flow inside a parallel plate channel with staggered plates heated by a radiation heat flux for combined photovoltaic and air heater solar collector systems (PV/T) are carried out. Temperatures of the solid boundary elements of flow field were obtained through using the ray-tracing technique to obtain the net absorbed fractions of the radiation heat flux the solid boundary surface elements. The model temperature results values were validated with measured temperature data and a good agreement prevailed. The model is used to investigate the optimization of configuration parameters of a parallel-plate channel with staggered plates based on the convective heat transfer coefficient (j), and friction factor (f) corresponds to the maximum value of the ratio of j/(f/2) within the flow Reynolds number ranging from 650 to 2550. The results show that: the optimum spacing of each staggered plate relative to nearest channel wall is around one-third of the channel height while the optimum (one) staggered plate length is ranging from 1.58 to 1.75 times the channel hydraulic diameter.
Related Topics
Physical Sciences and Engineering Energy Energy Engineering and Power Technology
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