The potential of phase change energy storage for office cooling load shifting

9th Edition of the International SOLARIS Conference

Cunha, J.P.^1 ; Eames, P.C.^1

Centre for Renewable Energy and Systems Technologies, Loughborough University, LE11 3TU, United Kingdom^1

关键词: Conventional systems;    Cooling requirements;    Finite volume model;    Load shifting;    Mechanical ventilation;    Night-time cooling;    Open-plan offices;    Phase change energy storage;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/556/1/012058/pdf
DOI  :  10.1088/1757-899X/556/1/012058

来源: IOP

【 摘 要 】

An analysis of the performance of four cooling approaches to meet daytime office cooling requirements for an open plan office was undertaken using a finite-volume model implemented in Matlab. The four cooling approaches simulated were: a conventional HVAC system (A), using extra ventilation on demand (B), using cool night time air to charge a store with RT15 (C) and charging a store with RT8HC using night time off peak electricity (D). Charging the thermal store with cool night time air reduced the yearly cooling demand by 39% compared to the conventional HVAC cooling system. Mechanical ventilation on demand achieved a reduction of 34% compared to the same conventional system. Using off peak electricity to charge the PCM store achieved a reduction of 15%, and successfully shifted daily cooling demands into night time operation during spring and autumns months. Due to the high capital cost of the thermal stores, the lowest cost of energy was obtained using extra ventilation on demand, with a cost of 84.45/MWh for an assumed 20-years of operation.