Abstract
In order to effectually improve the performance of parabolic trough solar collector system and homogenize the temperature distribution on the absorber tube, an innovative convergent-divergent tube was designed as the absorber tube of PTR. The finite volume method (FVM) and the Monte Carlo ray tracing method (MCRT) are combined to simulate the heat transfer process in parabolic trough collector. The average relative error between the numerical results and the experimental results conducted in the Spanish DISS test facility is 1.103%, which confirms the reliability of the simulation results in this paper. The heat transfer characteristics and flow characteristics of PTR and convergent-divergent PTR are compared in the inlet velocity range of 0.05-0.75m/s, and the effect of the number of zoom sections(N) for CD-PTR performance is also studied. The simulation results show that the parabolic trough collector with convergent-divergent tube has significantly enhanced heat transfer capability. The average Nu of CD-PTR increases as the number of zoom sections increases, and is always higher than that of PTR. When Re=86400 and N=25, the average Nu increased by 66%.
Highlights
Eliminating the negative environmental impact of using fossil fuels, meeting the growing energy demand brought about by development, and seeking renewable and environmental friendly alternatives have become topics of great concern in recent years [1,2]
The great potential of solar energy to satisfy the energy needs in many fields is increasingly recognized by relevant researchers [4,5,6]
Analysis of Parabolic trough receiver (PTR) Heat Transfer Performance To achieve the goal of improving system thermal conditions and enhancing the heat transfer performance, it is necessary to first study heat flux distribution outside PTR metal absorber tube
Summary
Eliminating the negative environmental impact of using fossil fuels, meeting the growing energy demand brought about by development, and seeking renewable and environmental friendly alternatives have become topics of great concern in recent years [1,2]. Pandey et al [33] numerically calculated the effect of the most viable options to replace fossil fuel power plants of inserting an arc plug into the PTR absorption tube on the [9,10,11]. The concentrated solar power (CSP) system that heat transfer performance of the system. In order to obtain focuses solar radiation energy onto the receiver can reduce the optimal size R of the arc plug, a series of calculations are the requirement of collector materials and provide lower carried out. The par- and R=0.879, PTC has the highest thermal efficiency
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