Feasibility analysis of using mine water from abandoned coal mines in Spain for heating and cooling of buildings

RENEWABLE ENERGY

卷:146

Article

Menendez, Javier¹  Ordonez, Almudena²  Fernandez-Oro, Jesus M.³  Loredo, Jorge²  Diaz-Aguado, Maria B.² 

[1] Hunaser Energy, Avda Galicia 44, Oviedo 33005, Spain

[2] Univ Oviedo, Dept Min Exploitat & Prospecting, Independencia 13, Oviedo 33004, Spain

[3] Univ Oviedo, Energy Dept, Dept Bldg East Zone,Campus Viesques, Gijon 33271, Spain

关键词: Abandoned mines;    Mine water;    Geothermal energy;    Heat pump;    Underground mining reservoir;    Sustainable energy;   

DOI  :  10.1016/j.renene.2019.07.054

来源: Elsevier

【 摘 要 】

In 2017, renewable energy accounted for 19.5% of the total energy used for heating and cooling in the European Union. This paper analyses the technical and economic feasibility of using mine water from flooded underground coal mines in Spain to provide renewable thermal energy to buildings located in surrounding areas. High efficiency heat pump system is proposed to provide sustainable energy for district heating and cooling, leading to a reduction of greenhouse gas emissions to the atmosphere. The results obtained show that 20 MW of thermal energy is available for heat recovery from mine waters, compared to 4 MW of electrical power committed for pumping from inside the mines and heat pump consumption. The economic model that has been developed indicates that the feasibility of the geothermal plants depends on the amount of thermal energy demanded, the efficiency of the system and the distance from the abandoned mines to potential users. A mine water geothermal plant with 10 MW of power provides energy for about 1,700 households at a distance of 2 km with an investment cost of 3.25 M(sic). Regarding the reduction of CO2 emissions, the emission factor is reduced to 0.048 kgCO(2) kWh(-1) using this approach. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free