Heat flexibility evaluation and multi-objective optimized control of a low-energy building with district heating

Yang, Xiaochen; Pan, Li; Guan, Wenze; Ma, Hongting; Zhang, Chen

doi:10.1016/j.enbuild.2022.112523

Cited by 18 publications

(2 citation statements)

References 31 publications

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“…Climate limitations, high upfront costs, maintenance requirements, compatibility issues, and noise levels are all factors that can impact the effectiveness of hybrid heat pumps. Therefore, careful consideration of these factors is essential before adopting hybrid heat pump technology [10,30].…”

Section: Embracing Low-carbon Heating Pathways With Hybrid Heat Pumpsmentioning

confidence: 99%

Hybrid Heat Pump Performance Evaluation in Different Operation Modes for Single-Family House

Tihana,

Ali,

Apse

et al. 2023

Energies

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Hybrid heat pump (HHP) represents a heating system (HS) that simultaneously utilises two or more energy sources. The key novelty is the integration of an optimised control strategy, effectively maximising the efficiency of both the heat pump and gas boiler segments. In this study, a HHP system that consists of an air-source heat pump (ASHP) and a condensing-type gas boiler (GB) for a two-story single-family house was calculated and validated. The results from three different calculation methods were obtained: the heat pump manufacturer’s calculator, the simulator programme, and the calculations based on real measured data. Two operation modes were tested: economic mode, where the cheapest energy resource becomes the priority, and ecological mode, where the system operates using the energy resource with lowest CO2 emissions. When comparing consumed energy, there was a 15.36% variance between the manufacturer’s program and the actual measured data, while for produced energy, the difference amounted to 25.81%. It was found that the balance point temperature is −7 °C, where the heat pump unit of the HHP system can cover necessary heat losses until that point, while the gas boiler operates at lower temperatures. Changes in electricity price can significantly influence the point of the system switch, but the possibility to cover heat loads of the heat pump unit always has to be taken into account.

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Section: Embracing Low-carbon Heating Pathways With Hybrid Heat Pumpsmentioning

confidence: 99%

Hybrid Heat Pump Performance Evaluation in Different Operation Modes for Single-Family House

Tihana,

Ali,

Apse

et al. 2023

Energies

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“…Furthermore, they demonstrate that the heating system of well-insulated buildings can be shut off for more than 24 hours and the flexibility potential is highly influenced by the type of insulation and the heating emitter system. Yang et al [20] analyse the thermal dynamics of low-energy buildings connected to a district heating system using detailed Modelica models. They optimize the strategy to unlock flexibilities inside a building connected to a district heating network using a variable heat price.…”

Section: Quantification Of Flexibility In Buildingsmentioning

confidence: 99%

Quantifying Demand Flexibilities of Buildings for an Optimal Design and Operation of Integrated District Energy Systems

George

Rath

Bracke

2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

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The EU's ambitious climate targets have highlighted the need for novel methodologies in the integrated energy system planning and the development of sector-coupled operation strategies. In order to balance generation and consumption in the electricity grid with a high share of renewable energies, energy storage potentials have to be utilized across all sectors and new demand-side management strategies have to be developed. The energy storage potentials of buildings could benefit the grid stability and support the exploitation of renewable energy sources. Still, these potentials are not well quantified and are not considered in today's planning methods for district energy systems. This paper presents the derivation of widely applicable linear building models that capture both detailed demand characteristics and storage characteristics from dynamic building simulations, while accounting for thermal comfort. These models are integrated into linear energy system optimization models, enabling the hourly optimization of air source heat pump operation and the heat emittance into the buildings. The resulting approach allows for the quantification of flexibility indicators and provides insights into efficient operation strategies for buildings with varying thermal characteristics. The results indicate that all investigated buildings show economically viable potential for utilizing their thermal flexibility. While wellinsulated buildings demonstrate higher potential for longer-lasting preheating and storage periods, still buildings with poor or moderate insulation also offer potential for shorter periods of utilization.

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Dynamic thermal performance and energy-saving potential analysis of a modular pipe-embedded building envelope integrated with thermal diffusive materials

Yang,

Chen

2023

Build. Simul.

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Heat flexibility evaluation and multi-objective optimized control of a low-energy building with district heating

Cited by 18 publications

References 31 publications

Hybrid Heat Pump Performance Evaluation in Different Operation Modes for Single-Family House

Hybrid Heat Pump Performance Evaluation in Different Operation Modes for Single-Family House

Quantifying Demand Flexibilities of Buildings for an Optimal Design and Operation of Integrated District Energy Systems

Dynamic thermal performance and energy-saving potential analysis of a modular pipe-embedded building envelope integrated with thermal diffusive materials

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