Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35140
Title: Optimal design and control of cool thermal energy storage systems for building demand management
Authors: Cui, Borui
Advisors: Wang, Shengwei (BSE)
Xiao, Fu (BSE)
Keywords: Energy storage -- Equipment and supplies.
Buildings -- Energy consumption
Buildings -- Energy conservation.
Issue Date: 2015
Publisher: The Hong Kong Polytechnic University
Abstract: This thesis presents the investigations on the optimal design and control of cool thermal storage systems for building demand management. The developed strategies include optimal design of active cool thermal energy storage (CTES) for building peak load management, fast power demand response (DR) strategies for buildings involving both active and passive CTES for smart grid applications and optimal design of active CTES for building demand management. These new strategies in different subjects are proposed and validated on a dynamic simulation platform. A simulation-based optimal design method is developed and used to optimize the capacity of CTES. The quantitative analysis on the life-cycle cost saving potentials of active cold storage systems concerning the operational cost, initial investment and the space cost is also proposed. The optimal capacities of active CTES, monthly/annual operational cost savings and corresponding peak demand set-points are obtained from using the marginal decision rule. Results show that small scale storages can offer substantial annual net cost saving. Two fast power DR strategies involving both active and passive cool storages are presented. Certain number of operating chiller(s) is shut down at the beginning of the DR event to achieve a significant and immediate power reduction. In the basic fast DR strategy, only chiller power demand reduction is the control objective while in the improved fast power DR strategy, the building indoor temperature during the DR event is the second control objective to control indoor thermal comfort degradation. The results of case studies show that stepped and significant power reduction can be achieved. The power demand reduction and indoor temperature during the DR event can be also predicted accurately. The life-cycle cost benefit analysis and optimal design of active CTES for building demand management is also proposed. It is assumed that the active CTES is under control of the fast power DR strategy during the DR event. Meanwhile, during the normal days, the active CTES is under control of the storage-priority control to shift peak demand. Based on the different indoor thermal comfort requirements, the optimized capacities of active CTES, the corresponding life-cycle cost saving potentials and the chiller power reduction set-points in the developed fast power DR strategy are then identified. The results show that the optimal capacity of active CTES largely increases with the decrease of the upper limit of indoor temperature set-point.
Description: PolyU Library Call No.: [THS] LG51 .H577P BSE 2015 Cui
xxv, 197 pages :illustrations (some color)
URI: http://hdl.handle.net/10397/35140
Rights: All rights reserved.
Appears in Collections:Thesis

Files in This Item:
File Description SizeFormat 
b28135970_link.htmFor PolyU Users203 BHTMLView/Open
b28135970_ir.pdfFor All Users (Non-printable)3.89 MBAdobe PDFView/Open
Show full item record

Page view(s)

91
Last Week
4
Last month
Checked on Jul 9, 2017

Download(s)

55
Checked on Jul 9, 2017

Google ScholarTM

Check



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.