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首页> 外文期刊>Science and Technology for the Built Environment >Development of reduced order thermal dynamic models for building load flexibility of an electrically-heated high temperature thermal storage device
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Development of reduced order thermal dynamic models for building load flexibility of an electrically-heated high temperature thermal storage device

机译：用于建设电加热高温热存储装置的负荷柔性的减少阶热动力学模型的开发

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A control-oriented model of an Electrically heated Thermal Energy storage device (ETS) is presented. The ETS consists of bricks heated up to 871 degrees C with electric coils; heat is discharged with an airflow passing through channels in the bricks. The device stores energy during off-peak periods to meet future on-peak building heating loads. While its rationale is understood, improvement regarding operation strategies is needed. The charging/discharging could be adjusted according to predicted heating loads to reduce bills, and enhance building energy flexibility in its interaction with the grid. The model, to facilitate implementation of model predictive control (MPC), is based on the following features: (a) calibration of grey-box resistance-capacitance models with a heat exchanger model; (b) periodic state updates from sensors; (c) "effective" brick conductivity. A 1-capacitance model with state updates and "effective" brick conductivity was comparable to a detailed 140-capacitance model. Therefore, a simple model with modifications gives adequate predictions and thus can aid with MPC. Finally, strategies are evaluated to study energy flexibility potential. Using the ETS during the morning critical demand hours and anticipating the rise in setpoint temperature from nighttime setback, peak reduction 11% is obtained. A reduction of 73% is found when HVAC heating coil is limited.
机译：提出了一种控制的电加热热能存储装置（ETS）的控制模型。 ETS由电动线圈加热到871摄氏度的砖块;热量通过通过砖中的通道的气流排出。该器件在非高峰期间存储能量，以满足未来的峰值建筑加热负载。虽然理解其理由，但需要有关操作策略的改进。可以根据预测的加热载荷来调节充电/放电以减少纸币，并增强与电网的相互作用的建筑能量灵活性。该模型，以促进模型预测控制（MPC）的实施，基于以下特征：（a）具有热交换器模型的灰度电阻电容模型的校准; （b）传感器的定期状态更新; （c）“有效”砖电导率。具有状态更新和“有效”砖电导率的1型电容模型与详细的140电容模型相当。因此，具有修改的简单模型提供了足够的预测，因此可以帮助MPC。最后，评估策略以研究能量灵活性潜力。在早晨的临界需求时使用ETS，并预测从夜间挫折的设定点温度的上升，获得峰值减少11％。当HVAC加热线圈有限时，发现减少73％。

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