Energy flexibility of a nearly zero-energy building with weather predictive control on a convective building energy system and evaluated with different metrics

Liu, Mingzhe; Heiselberg, Per

doi:10.1016/j.apenergy.2018.10.070

Cited by 59 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As one of the most important parameters to the grid, this metric defines the ability of a building to adjust power during high price periods and low price periods, which is also used by the authors in [2]. Buildings are expected to reduce more power demand during high-price periods and thereby contribute to the reduction of the peak load of the grid.…”

Section: Ability Of Power Adjustmentmentioning

confidence: 99%

“…This metric is presented as the factor of energy flexibility (F Flexibility ) calculated by equation (2). Where q heating+cooling is the hourly energy consumption of heating and cooling.…”

Section: Energy Flexibility Factormentioning

confidence: 99%

“…Energy flexibility is a growing activity of research. Buildings can store energy with equipment like water tanks and batteries, or the building structure itself [1][2][3]. In this way, they can adjust their energy demand, which can help in solving the problems with future energy grids dominated by intermittent renewable energy sources.…”

Section: Introductionmentioning

confidence: 99%

“…There is a promising potential of the thermal mass of the building structure. Therefore, in different case studies, it is commonly evaluated how thermal structure of a building can take best advantage of fluctuating energy prices [1][2][3] As stated in [3], the investigation approach of such cases confirms for high energy cost savings when thermal mass is being activated in order to achieve optimized energy consumption profile. However, it is also mentioned that the results are highly case dependent, due to the fact the savings vary of the local energy price market and thus can be difficult to generalize conclusions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Energy flexibility of office buildings – Potential of different building types

et al. 2019

Self Cite

View full text Add to dashboard Cite

The objective of this study is to investigate and assess the energy flexibility performance of typical Danish office buildings constructed at different periods. Four building study cases have been compared with different heating demands, structural thermal masses, envelope insulation levels and infiltration rates. All cases are equipped with the same novel two-pipe heating and cooling system. Each case is divided in four subcases with variations of heat gains: people load, lighting load, equipment load, solar gain. Analyses and comparisons have been performed on different parameters, including power load shifting and grid adjustment, comfort level, and economical benefits. All investigated cases are tested with two control strategies: a normal reference control strategy and an energy flexibility control. The flexible controller adjusts the indoor temperature set points for heating and cooling depending on different energy price levels.

show abstract

Section: Ability Of Power Adjustmentmentioning

confidence: 99%

“…This metric is presented as the factor of energy flexibility (F Flexibility ) calculated by equation (2). Where q heating+cooling is the hourly energy consumption of heating and cooling.…”

Section: Energy Flexibility Factormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Energy flexibility of office buildings – Potential of different building types

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The most recent paper of Bechtelet al [10] have shown that in single family houses, a model predictive controller determines the cost-optimal operating cycles of the heat pump in combination with thermal energy storage. Liu et al [11] have evaluated as control strategies of a heating and cooling system: adjustment of set-points for heating and cooling and adjustment of set-points together with a rule-based weather predictive control strategy. The paper of Guillen-Lambea et al [12] is focused on the control strategies for the energy recovery ventilators.…”

Section: Introduction and Literature State Of The Artmentioning

confidence: 99%

Evaluation and optimization of the performance of the heating system in a nZEB educational building by monitoring and simulation

Borrelli

Merema

Ascione

et al. 2021

Energy and Buildings

View full text Add to dashboard Cite

The optimal control of the HVAC system in the nearly zero energy buildings (nZEBs) can be considered as a challenge.Indeed, the lack of data given by monitored data does not allow understanding what are the implications of different strategies on thermal comfort and energy consumptions. This paper determines an approach for the evaluation of the management of the heating system in an existing educational nZEB. The aim is to understand how the energy efficiency of the heating system is sensitive to controls strategies and the important role played by the control systems. The test lecture rooms on KU Leuven Ghent Technology Campus (Belgium) have been chosen as case study.A deep analysis, starting from an in-field monitoring, was carried out during the winter period of 2019, in order to assess the actual operation and the energy use of building systems under real conditions. Then, a building energy simulation (BES) model of the building and its systems was developed and calibrated against the real monitoring data. Control strategies of the heating system are simulated and compared to the current configuration. The simulation results show that strategies based on a definition of a heating curve for the boiler can reduce the comfortable time (-23%). Controlling the temperature inside the storage tank as a function of the outdoor temperature together with the control on the activation of the air handling unit result in an energy savings from 32% to 46%, with a correspondent increase of comfort time in the period from 0.6% to 3.4% compared to the baseline scenario, depending to the relationship between the external temperature and water temperature inside the water storage tank.

show abstract

Techno‐economic assessment of a new biomass‐driven cogeneration system proposed for net zero energy buildings

Mohammadikhah

Javaherdeh

Mahmoudimehr

2021

Env Prog and Sustain Energy

View full text Add to dashboard Cite

This study evaluates the techno‐economic feasibility of a new biomass‐driven cogeneration system designed to fulfill all energy requirements (i.e., electricity, hot water, cooling, and heating) of a grid‐connected building throughout the year. The proposed system is also expected to achieve the goal of zero energy building (ZEB). A 10‐story residential complex is considered as the present case study. The study is carried out for three cities of Iran with different climate conditions (mild, hot, and cold) and with the annual energy requirements of about 104,472 kWh, 128,784 kWh, and 142,518 kWh, respectively. After defining two objective functions (“annual actual benefit” and “loss of building requirements supply probability”), the system is optimized by using the Non‐dominated Sorting Genetic Algorithm (NSGA‐II). The results show that the designed system is economically viable with the levelized cost of energy (LCOE) of about 0.15–0.2 $/kWh. The results also indicate that if the cost of CO2 emission is taken into consideration, the annual benefit of the system is decreased by 16%–25%. Finally, a sensitivity analysis shows that heat generation cost and electricity selling price have the most and the least effect on the system's annual benefit, respectively.

show abstract

Energy flexibility of a nearly zero-energy building with weather predictive control on a convective building energy system and evaluated with different metrics

Cited by 59 publications

References 31 publications

Energy flexibility of office buildings – Potential of different building types

Energy flexibility of office buildings – Potential of different building types

Evaluation and optimization of the performance of the heating system in a nZEB educational building by monitoring and simulation

Techno‐economic assessment of a new biomass‐driven cogeneration system proposed for net zero energy buildings

Contact Info

Product

Resources

About