A novel hybrid energy system combined with solar-road and soil-regenerator: Sensitivity analysis and optimization
Document Type
Article
Publication Date
1-1-2018
Abstract
To reduce the dependency of fossil fuels and greenhouse effect, the authors have proposed a novel solar-road and soil-regenerator hybrid energy system (SRSRHES), which utilizes a combination of Photovoltaic-Thermal (PVT) and soil heat storage technologies on the roadways. Design parameters and meteorological conditions affect the thermal storage performance of SRSRHES, which directly influences its annual performance and cost-effectiveness. Therefore, the study investigated the influence of flow rate, soil thermal properties, collector area, and borehole depth on electrical and thermal performance in three different cities with a numerical method to realize rational configuration of design parameters for the system. The results indicated that the recommended flow rates are 0.5, 0.3, and 0.3 kg/s in Beijing, Harbin, and Barkam respectively; Overall energy efficiency for different soils is different that is increased in the order of clay, sandy soil, sandstone, limestone, and granite. Collector area exerts a positive effect on total energy generation, but has a negative effect on overall energy efficiency. Borehole depth has a positive effect on both total energy generation and overall energy efficiency; Furthermore, the influence of various parameters on power generation performance is less than thermal storage performance, and overall energy efficiency mainly depend on thermal storage performance.
Keywords
Solar road, Ground heat exchanger, Photovoltaic-thermal, Electrical efficiency, Thermal storage efficiency, Overall energy efficiency
Divisions
fac_eng
Funders
Natural Science Foundation of China (No.: 51678488),Youth Science and Technology Innovation Team of Sichuan Province of Building Environment and Energy Efficiency (No: 2015TD0015)
Publication Title
Renewable Energy
Volume
129
Publisher
Elsevier