In-situ microwave heating-assisted coalbed methane extraction using hybrid photovoltaic-wind power: Performance analysis and system optimization
Case Studies in Thermal Engineering, vol. 75, pp. 107208
Abstract
This paper proposes a novel in-situ microwave heating technology for coalbed methane extraction integrated with a photovoltaic-wind hybrid microgrid, aiming to reduce the energy consumption and environmental impact associated with conventional mining methods. A multi-physics mathematical model encompassing electromagnetic fields, heat transfer, coal deformation, and gas seepage was established to simulate the dynamic coupling process during microwave-assisted methane extraction. The effects of microwave power and coal seam parameters—including thickness, initial permeability, and Langmuir coefficient—on methane desorption efficiency and system economics were systematically investigated. Results indicate that the microgrid configuration with solar power requires the lowest initial investment, and the overall economic performance of the system is optimized at a microwave power density of 1000 W/m. Microwave heating enhances methane desorption, increasing extraction efficiency by 30% compared to traditional methods. Economic analysis reveals that coal seam thickness and the Langmuir coefficient significantly influence system economics, whereas initial permeability has a minor effect. A combination of high permeability (4.5×10 -16 m 2 ) and high Langmuir coefficient (0.048 m 3 /kg) yields the lowest gas production cost (0.0549–0.2364 USD/m 3 ), which is substantially below China's natural gas market price (0.35 USD/m 3 ). Medium-thick coal bed demonstrate greater resilience to natural gas price fluctuations. The study confirms that the PV-wind microgrid effectively mitigates energy supply instability and enables low-cost, low-emission coalbed methane development.
Authors 10
-
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454002, China
-
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
-
Housheng Jia corresponding
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454002, China
-
Sichuan University · State Key Laboratory of Hydraulics and Mountain River Engineering
Affiliation as printed
State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
-
Taiyuan University of Technology
Affiliation as printed
Key Laboratory of In-situ Property-improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, China
-
Affiliation as printed
Institute for Applied:Geophysics' and Geothemal Energy, RWTH Aachen University, 52074 Aachen, Germany
-
China University of Petroleum, East China
Affiliation as printed
Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, China
-
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454002, China
-
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454002, China
-
Affiliation as printed
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454002, China
State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization, Henan Polytechnic University, Jiaozuo, 454002, China
Cited by 2 stored of 2
2 results
No patents citing this paper on Lens.org (checked 2026-10-06).