Predicted and measured user-related energy usage in newly built low-energy schools in Sweden

Simanic, Branko; Nordquist, Birgitta; Bagge, Hans; Johansson, Dennis

doi:10.1016/j.jobe.2019.101142

Cited by 13 publications

(13 citation statements)

References 11 publications

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“…Systems equipped with variable air flow (VAV) or demand-control (DCV) will reduce the use of both electricity for fan operation and heat for tempering the supply air, compared to systems with constant airflow rates. There is a possibility however that the ventilation running times and ventilation rates may not be optimised; these factors have been found to significantly influence a school building's energy performance [11]. A very wide range of values for buildings in category A were also found, which shows the great diversity that characterises naturally ventilated buildings.…”

Section: Analysis Of Energy Performance Building Indicators and Measmentioning

confidence: 99%

A study on the relationship between energy performance and IEQ parameters in school buildings

et al. 2021

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Over the last decades, strong focus has been placed on the energy efficiency of buildings; not least school buildings. Energy performance (EP) of buildings is nowadays in principle described by one single indicator based on purchased energy in kWh/year.m2. Another important building performance aspect is the indoor environmental quality. This study’s overarching goal is to identify school buildings with a good balance between energy performance and indoor environment. Thus, this paper investigates possible correlations between information given in energy performance certificates (EPCs/e.g. energy use, year of construction, type of ventilation) and measured indoor environmental parameters. The work comprises investigation of approximately 20 school buildings with different ventilation systems in Gothenburg. In-situ investigations of the buildings’ properties and ventilation systems were conducted. Indoor environmental parameters were recorded during one week in each classroom. In this paper, indoor temperature, absolute humidity added indoors and CO2 concentration data are compared with the corresponding school’s energy performance data and ventilation type. Results suggest that mechanically ventilated buildings have clearer relationships between energy performance, building indicators and measured indoor environment. For buildings such as naturally ventilated, the relationships are usually weak, and the values spread over much wider ranges.

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Section: Analysis Of Energy Performance Building Indicators and Measmentioning

confidence: 99%

A study on the relationship between energy performance and IEQ parameters in school buildings

et al. 2021

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Section: Indoor Climate and Energy Simulationsmentioning

confidence: 99%

“…Dynamic energy simulation software IDA Indoor Climate and Energy 4.7.1 (IDA-ICE) [30] was used. The software used for simulations has been validated [31,32] and widely used in previous indoor climate and energy simulation studies [33][34][35][36][37]. The results obtained from the dynamic simulations were used to assess the energy savings potential of different measures and to calculate the energy use of buildings mainly with different structural and also some technical solutions.…”

Section: Indoor Climate and Energy Simulationsmentioning

confidence: 99%

Cost and Energy Reduction of a New nZEB Wooden Building

Arumägi

Kalamees

2020

Energies

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The current study demonstrates the possibilities of reducing energy use and construction costs and provides evidence that wooden nearly-zero-energy buildings (nZEB) are technically possible at affordable construction costs by using novel design processes and procurement models that enable scalable and modular production. The energy efficiency solutions were derived by increasing/decreasing the insulation value of the building envelope in successive steps. Financial calculations were based on the investment needed to achieve the nearly-zero-energy levels. Overall, many opportunities exist to decrease the cost and energy use compared to the current (pre-nZEB) practice because the net present value can change up to 150 €/m² on the same energy performance indicator (EPI) level. The EPI in the cost-even range was reached by combining a ground-source heat pump (between 115 and 128 kWh/(m²a)) and efficient district heating (between 106 and 124 kWh/(m²a)). As energy efficiency decreases, improving energy efficiency becomes more expensive by insulation measures. Throughout the EPI range the most cost efficient was investment in the improvement of the thermal transmittance of windows (3–13 €/(kWh/(m²·a)) while investments in other building envelope parts were less effective (4–80 €/(kWh/(m²·a)). If these were possible to install, photovoltaic (PV) panels installed to the roof would be the cheapest solution to improve the energy performance. Integrated project delivery procurement (design and construction together) and the use of prefabricated wooden structures reduced the constructing cost by half (from ~2700 €/net m² to 1390 €/net m²) and helped to keep the budget within limits.

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“…With the continuous development of the social economy, our demand for energy has greatly increased [1]. e traditional energy sources are mainly the combustion of fossil energy, such as thermal power generation and various equipment using gasoline as fuel, which have brought serious harm to the environment [2].…”

Section: Introductionmentioning

confidence: 99%

Archive-Based Multiobjective Evolutionary Algorithm for Large-Scale EV Charging Station Energy Management

Sheng

Duan

Wang

et al. 2021

Discrete Dynamics in Nature and Society

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With the increase in renewable energy, improving the utilization rate of renewable energy is of great practical significance. The microgrid has been proved effective in addressing this issue. As a flexible load, electric vehicles are connected to the grid on a large scale, which will have an impact on the grid. In order to solve this problem, this paper proposes a microgrid energy management model for electric vehicle charging stations, which takes into account the economics of microgrid operation and the stability of grid operation. Subsequently, this paper proposes an evolutionary multiobjective optimization algorithm to deal with constraints. Finally, this paper verifies the effectiveness of the proposed model and algorithm through experiments.

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Predicted and measured user-related energy usage in newly built low-energy schools in Sweden

Cited by 13 publications

References 11 publications

A study on the relationship between energy performance and IEQ parameters in school buildings

A study on the relationship between energy performance and IEQ parameters in school buildings

Cost and Energy Reduction of a New nZEB Wooden Building

Archive-Based Multiobjective Evolutionary Algorithm for Large-Scale EV Charging Station Energy Management

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