Air infiltration and related building energy consumption: A case study of office buildings in Changsha, China

Jie, Hu; Liu, Zhengxuan; Ma, Genshan; Zhang, Guoqiang; Ai, Zhengtao

doi:10.1016/j.jobe.2023.106859

Cited by 3 publications

(1 citation statement)

References 45 publications

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“…To achieve indoor thermal comfort and good air quality, it is necessary to combine ventilation and air conditioning [2]. With a supply of fresh air, the incoming air load increases energy demand for space heating and cooling [3]. Air conditioning accounts for about 1/3 of the total building energy consumption [4].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Ventilation Heat Recovery Modelling for AccuRate Home—A Benchmark Tool for Whole House Energy Rating in Australia

Sun,

Ren,

Guo

2023

Energies

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To manage energy-efficient indoor air quality, mechanical ventilation with a heat recovery system provides an effective measure to remove extra moisture and air contaminants, especially in bathrooms. Previous studies reveal that heat recovery technology can reduce energy consumption, and its calculation needs detailed information on the thermal performance of exhaust air. However, there are few studies on the thermal performance of bathroom exhaust air during and after showers. This study proposed a detailed thermal performance prediction model for bathroom exhaust air based on the coupled heat and mass transfer theory. The proposed model was implemented into the AccuRate Home engine to estimate the thermal performance of residential buildings with heat recovery systems. The time variation of the water film temperature and thickness on the bathroom floor can be estimated by the proposed model, which is helpful in determining whether the water has completely evaporated. Simulation results show that changing the airflow rate in the bathroom has little effect on drying the wet floor without additional heating. The additional air heater installed in the bathroom can improve floor water evaporation efficiency by 24.7% under an airflow rate of 507.6 m3/h. It also demonstrates that heat recovery can significantly decrease the building energy demand with the fresh air load increasing and contribute about 0.6 stars improvement for the houses in Hobart (heating-dominated region). It may be reduced by around 3.3 MJ/(m2·year) for the houses in other regions. With this study, guidelines for optimizing the control strategy of the dehumidification process are put forward.

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Section: Introductionmentioning

confidence: 99%

Mechanical Ventilation Heat Recovery Modelling for AccuRate Home—A Benchmark Tool for Whole House Energy Rating in Australia

Sun,

Ren,

Guo

2023

Energies

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Research on the air-infiltration rate shelter coefficient of building complexes based on building parameter clustering

Zheng,

Song,

Duanmu

et al. 2024

Journal of Building Engineering

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Applying infrared thermography to a latest residential building in France: case study, verifying dwellings national thermal regulations RT 2012 mainly thermal bridges assessment

Ramenah

2024

Sust. Build.

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High-performance insulation and airtight building envelopes are the two most important factors to optimize the building energy efficiency and thermal performance. However, thermal performance of building envelopes can be significantly affected by thermal bridging. Thermal bridges can take place at different locations of the building envelope, causing added transmission losses, increasing heat flow, lower inner surface temperatures. Thermal bridges are regarded in all national regulations for new buildings of all states of European Union (EU) but there are no specifications assessing balconies to wall junctions and the impact on the building thermal performance is not well regulated. In this paper, balcony to wall thermal bridge assessment using infrared thermography is highlighted. The originality is that, infrared thermography, has been applied to a real living latest building in the north east of France showing that there is noncompliance in the national regulations as some exigencies are not met. Thermography of thermal break windows and window doors has also revealed air leakage. The goal, is to illustrate that thermal imaging is a means of quality assurance to new building specifications and should include a clause specifying quality assurance procedure for balconies junction in national building regulations for all states of the EU.

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Air infiltration and related building energy consumption: A case study of office buildings in Changsha, China

Cited by 3 publications

References 45 publications

Mechanical Ventilation Heat Recovery Modelling for AccuRate Home—A Benchmark Tool for Whole House Energy Rating in Australia

Mechanical Ventilation Heat Recovery Modelling for AccuRate Home—A Benchmark Tool for Whole House Energy Rating in Australia

Research on the air-infiltration rate shelter coefficient of building complexes based on building parameter clustering

Applying infrared thermography to a latest residential building in France: case study, verifying dwellings national thermal regulations RT 2012 mainly thermal bridges assessment

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