A multi-timescale cold storage system within energy flexible buildings for power balance management of smart grids
Staff Page Link
Document Type
Journal Article
Publication Date
2020
Keywords
Demand response, Energy flexible building, Multi-time scale, Power balance, Seasonal cold storage, Smart grid
DOI
10.1016/j.renene.2020.07.079
Abstract
© 2020 Elsevier Ltd 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 multi-timescale 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.
Source Publication
Renewable Energy
Volume Number
161
ISSN
09601481
First Page
626
Last Page
634
Recommended Citation
Yan, C.,Wang, F.,Pan, Y.,Shan, K.,& Kosonen, R. (2020). A multi-timescale cold storage system within energy flexible buildings for power balance management of smart grids. Renewable Energy, 161, 626-634. http://dx.doi.org/10.1016/j.renene.2020.07.079