scholarly journals Simulation of Standby Efficiency Improvement for a Line Level Control Resonant Converter Based on Solar Power Systems

Energies ◽  
2015 ◽  
Vol 8 (1) ◽  
pp. 338-355 ◽  
Author(s):  
Ming-Tse Kuo ◽  
Ming-Chang Tsou
Keyword(s):  
Power Systems ◽  
Solar Power ◽  
Resonant Converter ◽  
Efficiency Improvement ◽  
Level Control ◽  
Line Level

scholarly journals Effect of quartz aperture covers on the fluid dynamics and thermal efficiency of falling particle receivers

2022 ◽  
pp. 1-51
Author(s):  
Lindsey Yue ◽  
Brantley Mills ◽  
Joshua M Christian ◽  
Clifford K. Ho
Keyword(s):  
Fluid Dynamics ◽  
Power Systems ◽  
Solar Power ◽  
Material Selection ◽  
Numerical Results ◽  
Test Facility ◽  
Efficiency Improvement ◽  
Thermal Test ◽  
Concentrated Solar Radiation ◽  
Radiative Losses

Abstract Falling particle receivers are an emerging technology for use in concentrating solar power systems. In this work, quartz half-shells are investigated for use as full or partial aperture covers to reduce receiver thermal losses. A receiver subdomain and surrounding air are modeled using ANSYS® Fluent®. The model is used to simulate fluid dynamics and heat transfer for the following cases: (1) open aperture, (2), aperture fully covered by quartz half-shells, and (3) aperture partially covered by quartz half-shells. We compare the percentage of total incident solar power lost due to conduction through the receiver walls, advective losses through the aperture, and radiation exiting the aperture. Contrary to expected outcomes, results show that quartz aperture covers can increase radiative losses and result in modest to nonexistent reductions in advective losses. The increased radiative losses are driven by elevated quartz half-shell temperatures and have the potential to be mitigated by active cooling and/or material selection. Quartz half-shell total transmissivity was measured experimentally using a radiometer and the National Solar Thermal Test Facility heliostat field. Average measured total transmissivities are 0.97±0.01 and 0.94±0.02 for concave and convex side toward the heliostat field, respectively. Quartz half-shell aperture covers did not yield expected efficiency gains in numerical results due to increased radiative losses, but efficiency improvement in some numerical results and the performance of quartz half-shells subject to concentrated solar radiation suggest quartz half-shell aperture covers should be investigated further.

Activities Results of Experiments for Space Solar Power Systems at USEF

2006 ◽  
Author(s):  
Shoichiro Mihara ◽  
Takashi Saito ◽  
Yutaro Kobayashi ◽  
Hiroshi Kanai
Keyword(s):  
Power Systems ◽  
Solar Power ◽  
Space Solar Power

scholarly journals A Novel Extension Decision-Making Method for Selecting Solar Power Systems

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Meng-Hui Wang
Keyword(s):  
Decision Making ◽  
Solar System ◽  
Power Systems ◽  
Power System ◽  
Solar Power ◽  
Important Task ◽  
Extension Theory ◽  
Solar Systems ◽  
Load Demand ◽  
Generating Capacity

Due to the complex parameters of a solar power system, the designer not only must think about the load demand but also needs to consider the price, weight, and annual power generating capacity (APGC) and maximum power of the solar system. It is an important task to find the optimal solar power system with many parameters. Therefore, this paper presents a novel decision-making method based on the extension theory; we call it extension decision-making method (EDMM). Using the EDMM can make it quick to select the optimal solar power system. The paper proposed this method not only to provide a useful estimated tool for the solar system engineers but also to supply the important reference with the installation of solar systems to the consumer.

Solar power systems

1977 ◽  
Vol 16 (4) ◽  
pp. 181-198 ◽  
Author(s):  
Jesse C. Denton
Keyword(s):  
Power Systems ◽  
Solar Power

Supercritical Carbon Dioxide Brayton Cycles Driven by Solar Thermal Power Tower System

2015 ◽  
Vol 1116 ◽  
pp. 94-129 ◽  
Author(s):  
Maimoon Atif ◽  
Fahad A. Al-Sulaiman
Keyword(s):  
Carbon Dioxide ◽  
Mathematical Model ◽  
Power Systems ◽  
Solar Power ◽  
Current Model ◽  
Thermal Power ◽  
Solar Thermal ◽  
Solar Thermal Power ◽  
Thermal Energy Storage Systems ◽  
Tower System

This chapter starts with a background about concentrating solar power systems and thermal energy storage systems and then a detailed literature review about concentrated solar power systems and supercritical Brayton carbon dioxide cycles. Next, a mathematical model was developed and presented which generates and optimizes a heliostat field effectively. This model was developed to demonstrate the optimization of a heliostat field using differential evolution, which is an evolutionary algorithm. The current model illustrates how to employ the developed model and its advantages. The optimization process calculates the optical performance parameters at every step of the optimization considering all the heliostats; thus yields accurate results as discussed in this chapter. On the other hand, complete mathematical model of supercritical CO2Brayton cycles when integrated with solar thermal power tower system was presented and discussed.

Sign in / Sign up

Export Citation Format

Share Document