Energy flexibility of residential buildings using short term heat storage in the thermal mass

Controlling district heating and cooling networks to unlock flexibility: A review

Quantifying the operational flexibility of building energy systems with thermal energy storages

https://orbit.dtu.dk/files/140693712/2018_Applied_Energy_Quantifying_demand_flexibility_of_power_to_heat_and_.._.pdf

Quantifying demand flexibility of power-to-heat and thermal energy storage in the control of building heating systems

Predictive Control Strategies based on Weather Forecast in Buildings with Energy Storage System: A Review of the State-of-the Art

The management of electricity grids requires the supply and demand of electricity to be in balance at any point in time. To this end, electricity suppliers have to nominate their electricity bids on the day-ahead electricity market so that the forecast supply and demand are in balance. One way to reduce the cost of electricity supply is to minimize the procurement costs of electricity by shifting flexible loads from peak to off-peak hours. This can be done by offering consumers time-of-use variable electricity tariffs as an incentive to shift their demand. This study provides typologies of smart grid energy ready buildings within the context of the Belgian residential building stock and the Belgian day-ahead electricity market. Typical new residential buildings are considered, equipped with air-to-water heat pumps that supply either radiators or a floor heating system. Five heating control strategies are compared in terms of thermal comfort, energy use, cost, and flexibility. Flexibility is quantified in ...

Smart grid energy flexible buildings through the use of heat pumps and building thermal mass as energy storage in the Belgian context

The management of electricity grids requires the supply and demand of electricity to be in balance at any point in time. To this end, electricity suppliers have to nominate their electricity bids on the day-ahead electricity market such that the forecasted supply and demand are in balance. One way to reduce the cost of electricity supply is to minimize the procurement costs of electricity by shifting flexible loads from peak to off-peak hours. This can be done by offering consumers time-of-use (ToU) variable electricity tariffs as an incentive to shift their demand. Smart control of HVAC equipment with embedded model predictive control (MPC) can be used in that context. They have to be provided with dynamic building simulation models. This study provides typologies of Smart Grid Energy ready Buildings within the context of the Belgian building stock and the Belgian day-ahead electricity market. A typical new residential building is considered, equipped with an air-to-water heat pump that supplies either radiators or a floor heating system. Five heating control strategies are compared in terms of thermal comfort, energy use and flexibility, where the flexibility is quantified in terms of load volumes shifted and in terms of procurement costs avoided. The first three are rule-based control strategies, whereas the latter two are ‘smart-grid’ model predictive control strategies responding to a time-varying electricity price profile. The results show that the ‘smart-grid’ control strategies allow to reduce the procurement costs by 2 to 18% and increase the flexibility by 8 to 24% (volume shifted) with the same thermal comfort. The impact of building insulation level and thermal mass is also evaluated. The flexibility for load shifting is about 8 to 10% higher when shifting from a low-energy (K45) to a very-low-energy house (K30).

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Clara Verhelst

Papers

Smart grid energy flexible buildings through the use of heat pumps and building thermal mass as energy storage in the Belgian context

Smart Grid Energy Flexible Buildings through the use of Heat Pumps in the Belgian context