Exploring the energy-saving potential of electromagnetic induction pavement via magnetic concentrating technique. (15th November 2020)

• Record Type: Journal Article
• Authors: Liu, Kai; Fu, Chaoliang; Wang, Hao; Wang, Fang; Xu, Peixin; Kan, Chaohao
• Is Part Of: Energy. Volume 211(2020)
• Publication Date: 2020-11-15
• Subjects: Energy efficiency -- Induction heating -- Magnetic absorption -- Asphalt pavement -- Waste; AMAL Asphalt magnetic absorption layer -- AMAL1 It was made of waste ferrites with a particle size of 0.6–1.18 mm mixed with asphalt -- AMAL2 It was made of graded waste ferrites mixed with asphalt -- ECIR Energy conversion improvement rate -- EMIP Electromagnetic induction pavement -- NPHS New pavement heating system -- SHR Self-healing ratio -- WF Waste ferrites -- WSS Waste steel shavings; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2020.118650
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Electromagnetic induction pavement (EMIP) is designed to heat the pavement through energy conversion to achieve pavement functions. However, there is a low energy conversion efficiency caused by the magnetic energy leakage phenomenon. To solve this problem, two kinds of asphalt magnetic absorption layer AMAL, including AMAL1 and AMAL2, were creatively designed by the magnetic concentrating technique. The direct tension test and shear test were conducted to test the road performance of AMAL. Meanwhile, the ice-melting experiments and self-healing experiments were conducted to compare energy conversion efficiency between conventional EMIP and new pavement heating system (NPHS) with AMAL. Results show that the shear strength and tensile strength of the AMAL1 was 0.95Mpa and 0.20Mpa, and that of the AMAL2 was 1.07Mpa and 0.21Mpa, both of which meet the requirements of road performance. Besides, the energy conversion efficiency was highest when the waste steel shavings content was 6% in ice-melting and self-healing experiments, whether AMAL1 or AMAL2 . The energy conversion efficiency of the NPHS with AMAL1 is greater than that with AMAL2 . Based on these results, AMAL1 was recommended. Finally, the results for the economic cost of unit NPHS show that the power cost saved by AMAL in 1 h is three times its construction cost. Highlights: A NPHS was proposed to improve the energy efficiency. Two kinds of AMAL were designed based on the magnetic concentrating technique. The direct tension test and shear test were conducted to test the road performance of AMAL. Ice-melting experiments and self-healing experiments were conducted to assess the energy efficiency of the NPHS. The economic cost of the NPHS was analyzed.