Seasonal thermal energy storage using natural structures:GIS-based potential assessment for northern China

作     者：Yichi Zhang Jianjun Xia Yichi Zhang;Jianjun Xia

作者机构：Midea HVAC Heating&Ventilation Equipment Co.LtdFoshan528311China Building Energy Research CenterTsinghua UniversityBeijing100084China 

出 版 物：《Building Simulation》 (建筑模拟（英文）)

年 卷 期：2024年第17卷第4期

页      面：561-574页

核心收录：

学科分类：08[工学] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 

基　　金：This study was supported by the 14th Five-Year National Key R&D Plan of China(Grant No.2022YFC3802401) Ministry of Housing and Urban-Rural Development R&D Project of China(Grant No.K20220771) 

主　　题：seasonal thermal energy storage geographical information system district heating water reservoir 

摘      要：Seasonal thermal energy storage(STES)allows storing heat for long-term and thus promotes the shifting of waste heat resources from summer to winter to decarbonize the district heating(DH)*** being a promising solution for sustainable energy system,large-scale STES for urban regions is lacking due to the relatively high initial investment and extensive land *** close the gap,this study assesses the potentials of using two naturally available structures for STES,namely valley and ground pit *** on geographical information system(GIS)methods,the available locations are searched from digital elevation model and selected considering several criteria from land uses and construction *** costs of dams to impound the reservoir and the yielded storage capacities are then quantified to guide the choice of suitable *** assessment is conducted for the northern China where DH systems and significant seasonal differences of energy demand *** total,2,273 valley sites and 75 ground pit sites are finally identified with the energy storage capacity of 15.2 billion GJ,which is much larger than the existing DH demand in northern *** results also prove that 682 valley sites can be achieved with a dam cost lower than 20 CNY/m^(3).By conducting sensitivity analysis on the design dam wall height and elevations,the choices of available natural structures are expanded but practical issues about water pressures and constructions are also ***,the identified sites are geographically mapped with nearest urban regions to reveal their roles in the DH *** general,560 urban regions are found with potential STES units and most of them have STES storage capacities larger than their own DH *** novel planning methodology of this study and publicly available datasets create possibilities for the implementations of large-scale STES in urban DH systems.