A novel hybrid energy system combined with solar-road and soil-regenerator: Dynamic model and operational performance

Xiang, Bo, Cao, Xiaoling, Yuan, Yanping, Sun, Liangliang, Wu, Hongwei and Haghighat, Fariborz (2018) A novel hybrid energy system combined with solar-road and soil-regenerator: Dynamic model and operational performance. Energy Conversion and Management, 156. pp. 376-387. ISSN 0196-8904

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Solar roads are emergent and huge energy source in traffic domains. To improve the energy utilization efficiency of a solar road, a novel solar-road and soil-regenerator hybrid energy system in combination with conventional photovoltaic-thermal and soil heat storage technology was proposed. A mathematical model of the solar-road and soil-regenerator hybrid energy system was developed, validated, and applied to evaluate the thermal storage and power generation performance of the proposed system in cold regions. The results indicated that for critical thermal storage temperatures of 20, 30, and 40 °C, the proposed system decreased maximum photovoltaic cell temperatures by 24.09, 25.84, and 24.42 °C and increased electrical efficiencies by 6.85, 6.68, and 4.53%, respectively, compared with conventional solar roads. By storing heat in the soil and elevating soil temperatures, the proposed system also increased the average borehole wall temperatures by 2.93, 2.26, 1.87 °C. The proposed system produced overall energy efficiencies of 48.42, 55.47, and 66.58%, while conventional solar road efficiencies approximate 10.75%.

Item Type	Article
Additional information	This document is the Accepted Manuscript version, made available under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License CC BY NC-ND 4.0 (http://creativecommons.org/licenses/by-nc-nd/4.0/). Under embargo until 26 November 2018. The final, definitive version of this article is available online at doi: https://doi.org/10.1016/j.enconman.2017.11.066.
Date Deposited	15 May 2025 13:39
Last Modified	16 Jun 2025 00:03