Establishment and evaluation of performance index system of electric heated solid thermal storage.

By analyzing the electric heated solid thermal storage and supply unit, a performance index system consisting of three level-I indexes(including thermal storage capacity, thermal release capacity and unit efficiency) and eight level-II indexes (including thermal storage temperature uniformity, thermal storage completion degree, etc.) is established, to evaluate the performance of the unit. Taking the electric heated solid thermal storage and supply unit of one shopping mall in Zhangjiakou city as an evaluation object, the combination weighting is used to combine the variable coefficient method, entropy weight method and analytic hierarchy process, and obtain a reasonable weighted value. Then, fuzzy comprehensive evaluation method is used to acquire the performance evaluation grade of this boiler unit, and optimization proposals are raised according to the evaluation results. [ABSTRACT FROM AUTHOR]