Cost-optimal renovation and energy performance: Evidence from existing school buildings in the Alps

This paper is part of broader research aimed at determining the relationship between energy performance and energy costs as a part of the operational and life cycle costs in school buildings in the Federation of Bosnia and Herzegovina (FBiH), as exceptionally important social and public buildings. The research was conducted by statistical analysis of data collected from documents of detailed energy audits (DEA) for 185 school buildings in FBiH in relation to construction periods. The paper analyzes the characteristics of buildings such as construction period, building envelope characteristics, climatic conditions, efficiency of installed space heating system, number of users and heating mode. The aim of this research was to determine the energy performance for the existing state and to compare them with the allowable values in accordance with the applicable legal regulations. There is a performance gap between predicted (calculated) and measured (actual) delivered energy for space heating. This research shows poor energy performance and provides a basis for developing strategies and plans to improve energy efficiency. The results of the energy performance of school buildings in the FBiH are the first step towards the development of a model for predicting energy costs.

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Evaluation of School Building Energy Performance and Classroom Indoor Environment

Energies ◽

10.3390/en13102489 ◽

2020 ◽

Vol 13 (10) ◽

pp. 2489 ◽

Cited By ~ 2

Author(s):

Jitka Mohelníková ◽

Miloslav Novotný ◽

Pavla Mocová

Keyword(s):

Energy Consumption ◽

Energy Performance ◽

Climatic Conditions ◽

School Buildings ◽

School Building ◽

Indoor Climate ◽

Building Stock ◽

Building Envelopes ◽

Existing Building ◽

School Renovation

Existing building stock represents potential for energy saving renovations. Energy savings and indoor climate comfort are key demands for sustainable building refurbishment. Especially in schools, indoor comfort is an extremely important issue. A case study of energy consumption in selected school buildings in temperate climatic conditions of Central Europe region was performed. The studied buildings are representatives of various school premises constructed throughout the last century. The evaluation was based on data analysis of energy audits. The goal was aimed at assessment of the school building envelopes and their influence on energy consumption. One of the studied schools was selected for detailed evaluation. The school classroom was monitored for indoor thermal and visual environments. The monitoring was performed to compare the current state and renovation scenarios. Results of the evaluation show that the school buildings are highly inefficient even if renovated. Indoor climate in classrooms is largely influenced by windows. Solar gains affect interior thermal stability and daylighting. Thermal insulation quality of building envelopes and efficient solar shading systems appear to be fundamental tasks of school renovation strategies.

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

E3S Web of Conferences ◽

10.1051/e3sconf/202124601006 ◽

2021 ◽

Vol 246 ◽

pp. 01006

Author(s):

Blanka Cabovská ◽

Despoina Teli ◽

Jan-Olof Dalenbäck ◽

Sarka Langer ◽

Lars Ekberg

Keyword(s):

Indoor Environment ◽

Energy Use ◽

Environmental Parameters ◽

Absolute Humidity ◽

Energy Performance ◽

Building Performance ◽

School Buildings ◽

Indoor Environmental Quality ◽

Concentration Data ◽

Ventilation Systems

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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Using intelligent clustering techniques to classify the energy performance of school buildings

Energy and Buildings ◽

10.1016/j.enbuild.2006.04.018 ◽

2007 ◽

Vol 39 (1) ◽

pp. 45-51 ◽

Cited By ~ 129

Author(s):

M. Santamouris ◽

G. Mihalakakou ◽

P. Patargias ◽

N. Gaitani ◽

K. Sfakianaki ◽

...

Keyword(s):

Energy Performance ◽

School Buildings ◽

Clustering Techniques

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Investigation into energy performance of a school building in a hot climate: Optimum of window-to-wall ratio

Indoor and Built Environment ◽

10.1177/1420326x19842313 ◽

2019 ◽

Vol 29 (1) ◽

pp. 24-39 ◽

Cited By ~ 5

Author(s):

Mamdooh Alwetaishi ◽

Ahmad Taki

Keyword(s):

Thermal Insulation ◽

Computer Modelling ◽

Building Design ◽

Energy Performance ◽

Second Phase ◽

School Buildings ◽

School Building ◽

Energy Evaluation ◽

Hot Climate ◽

The Impact

Global attention is currently focussed on developing techniques to improve the thermal performance of buildings to provide indoor comfort with minimum reliance on energy load. Several studies have investigated building facade, materials used and other factors involved in building design. The aim of this study is to examine the impact of thermal insulation, shading devices, window-to-wall ratio (WWR) and a combination of these factors in a prototype school building design in the warm climate city of Taif, Saudi Arabia. The study used various methods classified into two main phases. The first phase involved on-site observation where both thermal imaging and regular cameras were used to examine the influence of orientation on glazing as a baseline. The second phase involved advanced software investigations with 2D AutoCAD, 3D Revit and computer modelling for energy evaluation and daylight factor. A detailed framework was introduced to examine current school buildings and to improve the future designs of prototype school buildings. The study revealed that a combination of applying thermal insulation along with minimising WWR is required in existing buildings within hot and dry regions. Furthermore, it was recommended that WWR should not exceed 35%, 25% and 20% for northwest, southeast and southwest building facades, respectively.

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