Indoor Environment and Energy Use in Historic Buildings - Comparing Survey Results with Measurements and Simulations

Rohdin, Patrik; Dalewski, Mariusz; Moshfegh, Bahram

doi:10.1080/14733315.2012.11683962

Cited by 16 publications

(21 citation statements)

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“…The inherent complexity of models, simplifications and parameter combinations makes it impossible for any method to fully validate a model [24,38] or for any model to be a perfect representation of reality [17]. Yet, accurate prediction of the simulated system is the main purpose of any simulation tool, and validation of the results is therefore essential to verify accuracy [17,[38][39][40]. Coakley et al [39] highlight that accuracy in predicting energy use is usually the only criterion for BES model validation, and that accuracy of the input data or the simulated environment is seldom assessed.…”

Section: Building Energy Simulation and Model Validationmentioning

confidence: 99%

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Fleur

Moshfegh

Rohdin

2017

Energy and Buildings

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 Energy use and indoor climate of a building are studied before and after a renovation  The study numerically predicts, validates and evaluates energy use and indoor climate  Energy demand is reduced by 44% after renovation and indoor climate is improved  Assumed user behavior has significant impact on estimated energy-saving potential  System boundary affects climate and resource impact from selected renovation measures

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Section: Building Energy Simulation and Model Validationmentioning

confidence: 99%

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Fleur

Moshfegh

Rohdin

2017

Energy and Buildings

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“…A standardized on-site questionnaire was used to study the perception of the indoor environment before and after the renovation. The questionnaire was developed by the Department of Occupational and Environmental Medicine at Örebro University Hospital in Sweden in 1988 [30] and has since been used in several studies of indoor environment in both new, old and renovated buildings [7,25,[31][32][33]. The questionnaire is available for several types of buildings, both residential, public, and office buildings.…”

Section: Areamentioning

confidence: 99%

Energy Use and Perceived Indoor Environment in a Swedish Multifamily Building before and after Major Renovation

2018

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Improved energy efficiency in the building sector is a central goal in the European Union and renovation of buildings can significantly improve both energy efficiency and indoor environment. This paper studies the perception of indoor environment, modelled indoor climate and heat demand in a building before and after major renovation. The building was constructed in 1961 and renovated in 2014. Insulation of the façade and attic and new windows reduced average U-value from 0.54 to 0.29 W/m2·K. A supply and exhaust ventilation system with heat recovery replaced the old exhaust ventilation. Heat demand was reduced by 44% and maximum supplied heating power was reduced by 38.5%. An on-site questionnaire indicates that perceived thermal comfort improved after the renovation, and the predicted percentage dissatisfied is reduced from 23% to 14% during the heating season. Overall experience with indoor environment is improved. A sensitivity analysis indicates that there is a compromise between thermal comfort and energy use in relation to window solar heat gain, internal heat generation and indoor temperature set point. Higher heat gains, although reducing energy use, can cause problems with high indoor temperatures, and higher indoor temperature might increase thermal comfort during heating season but significantly increases energy use.

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“…All those studies take as their point of departure a detailed understanding of the natural indoor environment and its variations in connection with any severe periodic alteration [3,7,11,[19][20][21][22][23][24][25][26]. These authors also showed that each building has its own specific indoor environment that depends on a host of local factors, precluding any possible generalisation in such studies.…”

Section: Introductionmentioning

confidence: 99%

Fluctuations in the indoor environment in Spanish rural churches and their effects on heritage conservation: Hygro-thermal and CO 2 conditions monitoring

Varas–Muriel

Fort

Martínez-Garrido

et al. 2014

Building and Environment

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The indoor environment and its natural dynamics in small Spanish historical churches such as the studied here depend on the variations of outdoor climate and the moisture dynamics of walls, built with different materials. Such indoor environments are impacted by local factors, which may put at risk the conservation of a church's cultural assets. Natural ventilation in spring, the presence of people and especially the wintertime use of ageing heating system induce substantial fluctuations in indoor environments primarily affecting the stability of relative humidity (RH). RH is the physical parameter that can induce efflorescence as well as plaster blistering and detachment in its inside walls, drying and cracking in the timber and efflorescence and disgregation in the carved dolostone.Where the RH inside building is not high, as in the present case, natural and induced fluctuations may lower it considerably (<25 %), which is detrimental to conservation and human well-being both. Human presence partially counters the steep declines in RH attributable to heating in winter and warm, dry summer weather, although the trade-off is a rise in CO 2 levels inside the church.Heating induces substantial changes in the T and RH on the high altar and in the upper areas of the nave, while natural ventilation affects the RH at the base of the church and favours the elimination of CO 2 . The results obtained have allowed us to develop a series of recommendations that might be useful for the preventive conservation of such historic buildings, without compromising human comfort.

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Indoor Environment and Energy Use in Historic Buildings - Comparing Survey Results with Measurements and Simulations

Cited by 16 publications

References 0 publications

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Energy Use and Perceived Indoor Environment in a Swedish Multifamily Building before and after Major Renovation

Fluctuations in the indoor environment in Spanish rural churches and their effects on heritage conservation: Hygro-thermal and CO 2 conditions monitoring

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