A multi-timescale cold storage system within energy flexible buildings for power balance management of smart grids

RENEWABLE ENERGY

卷:161

Article

Yan, Chengchu¹  Wang, Fengling¹  Pan, Yan²  Shan, Kui³  Kosonen, Risto^1,4 

[1] Nanjing Tech Univ, Coll Urban Construct, Nanjing 210009, Peoples R China

[2] Technol & Higher Educ Inst Hong Kong, Fac Sci & Technol, Hong Kong, Peoples R China

[3] Hong Kong Polytech Univ, Dept Bldg Serv Engn, Hong Kong, Peoples R China

[4] Aalto Univ, Dept Mech Engn, FI-00076 Espoo, Finland

关键词: Energy flexible building;    Demand response;    Seasonal cold storage;    Multi-time scale;    Smart grid;    Power balance;   

DOI  :  10.1016/j.renene.2020.07.079

来源: Elsevier

【 摘 要 】

Energy storage is widely used in energy flexible buildings, which have great potential for relieving the power imbalance of electrical grids. However, most of the existing energy storage systems are designed for short-term storage, and only a few systems reported for long-term or multi-time scale storage. This paper introduces a new type of multi-timescale cold storage system consisted of a heat pipe-based natural ice storage subsystem and a dual-operation chiller for buildings to enhance their energy flexibility. The proposed system operated in different modes to provide the seasonal cold storage, nighttime chilled water storage, and urgent demand response services, which can be used for relieving the power imbalance in the timescale of the long-term, short-term and real-time respectively. The working principle, system configuration, operation modes, and the implementation of the proposed system for multitimescale power management, are presented. A case study has been conducted in a building in Beijing to demonstrate the application and effectiveness. Results show that building load factors are greatly improved seasonally (from 19.5% to 49.5%) and daily (from 55.7% to 72.2%), and the power consumption is also considerably decreased (41.2%) during the demand response (DR) event. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free