Analysis of different models to estimate energy savings related to windows in residential buildings

Urbikain, M. Karmele; Sala, J.M.

doi:10.1016/j.enbuild.2009.01.007

Cited by 60 publications

(14 citation statements)

References 5 publications

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“…It has been claimed that windows can be blamed for up to 60% of a building's total energy loss [5]. The energy performance of a window is assessed through thermal transmittance (U-value), total solar energy transmittance (g-value), and air leakage [6][7][8]. Compared to other building elements, windows have a remarkably higher U-value [7].…”

Section: Introductionmentioning

confidence: 99%

Impact of Low-E Window Films on Energy Consumption and CO2 Emissions of an Existing UK Hotel Building

et al. 2019

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In order to fulfil the UK government’s ambitious goal of 80% reductions in greenhouse gas emissions by 2050 compared to the levels of 1990s, unprecedented measures for improving the energy efficiency of buildings are needed. This study investigates the impact of a specific type of Low-emissivity (Low-E) window film—Thinsulate Climate Control 75—on the holistic energy consumption of an existing United Kingdom (UK) hotel building. Building modelling and energy simulation software EDSL TAS is used to conduct the study. The result of the simulations demonstrates that by applying Thinsulate films, savings in heating, cooling, and total energy consumptions are achieved by 3%, 20%, and 2.7%, respectively. Also 4.1% and 5.1% savings are achieved in annual CO2 emissions and total energy costs, respectively, while the initial costs may be an issue. This study found that application of Low-E window films results in slightly better energy performance of the hotel regarding its heating-dominant climate. The study also recommends using average annual actual energy consumption data for a time range, instead of picking a single year’s data for validating purposes.

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Section: Introductionmentioning

confidence: 99%

Impact of Low-E Window Films on Energy Consumption and CO2 Emissions of an Existing UK Hotel Building

et al. 2019

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“…Moreover existing systems concentrate on heating and/or cooling purposes and do not take into account (or include it only in a generalized manner) the energy impact of windows on the energy demand for artificial lighting. Windows energy certification system can provide accuracy and easy to use information allowing selection of windows best suited for customers needs (Urbikain and Sala, 2009). It may also improve the quality of products available on the market through promotion of energy efficient solutions.…”

Section: Discussionmentioning

confidence: 99%

Energy labeling of windows – Possibilities and limitations

Trząski

Rucińska

2015

Solar Energy

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“…The assessment of solar radiation 2.3.1. Heat exchange at external surfaces of enclosures The values of absorption coefficient for solar radiation α sw of the surfaces of the building products in most cases are lesser than the values of long wave hemispherical emissivity ε lw (ASHRAE 2009;Banionis et al 2011;Urbikain, Sala 2009). A part of short wave solar radiation is absorbed by both external opaque and transparent surfaces.…”

Section: Theoretical Premisesmentioning

confidence: 99%

Hourly Calculation Method of Building Energy Demand for Space Heating and Cooling Based on Steady-State Heat Balance Equations

Monstvilas

Stankevičius

Karbauskaitė

et al. 2012

Journal of Civil Engineering and Management

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Correct evaluation of solar heat gains through fenestration into the rooms has a great impact on energy demand calculations for buildings. This article presents an hourly energy demand calculation method for heating and cooling, which considers the fact that the solar radiation flow passed through the transparent fenestration into the rooms is not adequate to the thermal energy flow. This method considers that the thermal energy flow in the rooms transformed from solar thermal radiation depends on the short-wave thermal radiation absorption coefficient of internal surfaces of the rooms. The value of short-wave thermal radiation absorption coefficient forms a considerable impact on the flow of thermal energy gains in the room. The presented method differs from others on that score that it considers additionally physical lows, according to which the solar short-wave thermal radiation energy admitted into the room is converted into the thermal energy. This hourly method enables precise calculating the hourly mean of indoor temperature and energy demand for heating and cooling of the buildings during the day.

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Analysis of different models to estimate energy savings related to windows in residential buildings

Cited by 60 publications

References 5 publications

Impact of Low-E Window Films on Energy Consumption and CO2 Emissions of an Existing UK Hotel Building

Impact of Low-E Window Films on Energy Consumption and CO2 Emissions of an Existing UK Hotel Building

Energy labeling of windows – Possibilities and limitations

Hourly Calculation Method of Building Energy Demand for Space Heating and Cooling Based on Steady-State Heat Balance Equations

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