Assessing overheating of the UK existing dwellings – A case study of replica Victorian end terrace house

Ji, Yingchun; Fitton, Richard; Swan, William; Webster, Peter J.

doi:10.1016/j.buildenv.2014.03.012

Cited by 49 publications

(29 citation statements)

References 10 publications

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“…At the time of the validation exercise, the building was uninsulated throughout, with the exception of 100-mm insulation at ceiling joist level. The wooden windows in the property are single-glazed sliding sash-type windows reconstructed to meet the airtightness and thermal transmittance characteristics of the dwelling (Ji et al 2014).…”

Section: Salford Energy House Test Facilitymentioning

confidence: 99%

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

et al. 2017

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The residential sector is responsible for 29% of the total energy consumption of the UK, with 62% of this energy being used for space heating. Heat loss through the fabric of building elements is a crucial factor in the energy efficiency of homes, and a wide number of studies have looked at physical interventions to improve the energy efficiency of existing buildings, commonly called retrofit. This research considers the impact of window coverings on reducing heat loss from homes, a measure that is not commonly considered an energy efficiency intervention. Although the amount of glazing varies widely between homes, all windows are a significant factor contributing to heat loss. While physical changes such as double and triple glazing can improve the energy performance of buildings, the impact of curtains and blinds is not well characterised. Previous research into window coverings has been undertaken using laboratory tests, such as hotbox and small climatic chamber environments. This study presents the impact of window coverings on heat loss within a unique whole house test facility. This allows for a better replication of a real heating system and the effects that it has on localised heat transfer. This gives a more detailed picture of in situ performance, similar to that which may be found in the field.

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Section: Salford Energy House Test Facilitymentioning

confidence: 99%

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

et al. 2017

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“…The building is considered a typical "two up, two down" home, meaning there are two habitable spaces on the ground floor (the living room and kitchen), and two habitable spaces on the first floor (each of the bedrooms). The building is also considered an end terrace, with the adjacent building conditioned to a fixed temperature to imitate occupancy (see [50] for a full description of the facility).…”

Section: Infrared Thermographymentioning

confidence: 99%

Variations in the U-Value Measurement of a Whole Dwelling Using Infrared Thermography under Controlled Conditions

et al. 2018

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U-values of building elements are often determined using point measurements, where infrared imagery may be used to identify a suitable location for these measurements. Current methods identify that surface areas exhibiting a homogeneous temperature-away from regions of thermal bridging-can be used to obtain U-values. In doing so, however, the resulting U-value is assumed to represent that entire building element, contrary to the information given by the initial infrared inspection. This can be problematic when applying these measured U-values to models for predicting energy performance. Three techniques have been used to measure the U-values of external building elements of a full-scale replica of a pre-1920s U.K. home under controlled conditions: point measurements, using heat flux meters, and two variations of infrared thermography at high and low resolutions. U-values determined from each technique were used to calibrate a model of that building and predictions of the heat transfer coefficient, annual energy consumption, and fuel cost were made. Point measurements and low-resolution infrared thermography were found to represent a relatively small proportion of the overall U-value distribution. By propagating the variation of U-values found using high-resolution thermography, the predicted heat transfer coefficient (HTC) was found to vary between 183 W/K to 235 W/K (±12%). This also led to subsequent variations in the predictions for annual energy consumption for heating (between 4923 kWh and 5481 kWh, ±11%); and in the predicted cost of that energy consumption (between £227 and £281, ±24%). This variation is indicative of the sensitivity of energy simulations to sensor placement when carrying out point measurements for U-values.

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“…With decades of development, thermal insulation became one of the most efficient approaches for reducing the heat transfer through the wall. However, large thermal resistance may also influence the heat dissipation of the wall when the ambient environment is cool [3]. For example, the air temperature during summer nights and transition seasons is low in the Central…”

Section: Introductionmentioning

confidence: 99%

Potential of Utilizing Different Natural Cooling Sources to Reduce the Building Cooling Load and Cooling Energy Consumption: A Case Study in Urumqi

Shen

2017

Energies

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Abstract:Generally, Central Asia is typical for regions with strong solar radiation and various natural cooling sources. The heat gain from the building envelope accounts for a large part of the cooling load there. Thus, the pipe-embedded envelope is receiving attention as a semi-active system of utilizing natural energy for cooling. In this study, the performance of the pipe-embedded envelope used in Urumqi is numerically investigated. The energy saving potential regarding evaporative cooling and a ground-source heat exchanger (GSHE) is evaluated over a complete summer. The results show that the built-in pipes can reduce 80% of the solar heat gain through windows, with an effectiveness of around 60%. External windows rather than internal windows should be insulated because the air cavity is cool. With respect to the pipe-embedded wall, it becomes a radiant cooling panel absorbing the heat from the room, with an effectiveness around 83%. The seasonal cooling energy is decreased by 25%-50% in a typical office with a pipe-embedded envelope. Offices with a large window-to-wall ratio are acceptable because natural cooling is employed. GSHE performs the best among the selected sources. The effectiveness of evaporative cooling is also satisfactory, with an energy saving rate of 27%. Overall, the pipe-embedded system is suitable for climatic regions like Urumqi.

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Assessing overheating of the UK existing dwellings – A case study of replica Victorian end terrace house

Cited by 49 publications

References 10 publications

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

The thermal performance of window coverings in a whole house test facility with single-glazed sash windows

Variations in the U-Value Measurement of a Whole Dwelling Using Infrared Thermography under Controlled Conditions

Potential of Utilizing Different Natural Cooling Sources to Reduce the Building Cooling Load and Cooling Energy Consumption: A Case Study in Urumqi

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