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- Title
Development of Reduced-Order Thermal Models of Building-Integrated Active PCM-TES.
- Authors
Dermardiros, Vasken; Yuxiang Chen; Daoud, Ahmed; Athienitis, Andreas K.
- Abstract
This paper presents an experimental and numerical study focusing on the development of control-oriented thermal models of varying order for an actively charged/discharged phase-change material thermal energy storage (PCM-TES) system intended for building integration. This PCM-TES system consists of five layers of phase-change material (PCM) panels with an air channel between the middle panels. Conditioned air is drawn through the cavity to charge and discharge the PCM. The PCM-TES system is tested in an environmental chamber where its dynamic response was carefully monitored. The monitored data is used for model validation. Compared to a detailed 30th order resistor-capacitor model, simplified 4th order and 2nd order nonlinear models are shown to be able to satisfactorily predict the thermal energy storage and release of the PCM-TES system. To simplify the PCM characterization inputandto reduce the simulation time, afive-parameter equation is developed to model the PCM specific heat and a fourparameter equation for its thermal conductivity. The presented modeling methodology is applicable for similar PCM-TES systems with multiple PCM layers and airflow channels.
- Subjects
ENERGY consumption of buildings; PHASE change materials; HEAT storage; CAPACITORS; THERMAL conductivity; REDUCED-order models
- Publication
ASHRAE Transactions, 2016, Vol 122, Issue 1, p267
- ISSN
0001-2505
- Publication type
Article