Techno-economic feasibility study for deep renovation of old apartment

Choi, Jaepil; Kim, Jun

doi:10.1016/j.jclepro.2022.135396

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…Due to the overlapping nature of households in all directions -upward, downward, left, and right -there are limited external-facing walls, resulting in minimal natural airflow or infiltration. Furthermore, tower-type apartment buildings, which have gained popularity in recent times, pose challenges for cross-ventilation, thereby limiting the use of natural ventilation strategies (Choi and Kim, 2023). In response to these concerns, Dubai Municipality has implemented regulations stipulating a minimum ventilation requirement in line with the latest edition of ASHRAE Standards 62.1, 62.2 and 170 for all new buildings (Dubai Municipality, 2020).…”

Section: Introductionmentioning

confidence: 99%

Correlating Temperature, Airtightness, and Pollutant Concentrations: Insights into Indoor Air Quality in Ajman Apartment Buildings

Jung,

Awad,

Ismail

et al. 2024

Future Cities and Environment

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This paper presents a comprehensive assessment of indoor air quality (IAQ) in newly constructed apartment buildings in small and medium-sized cities, with a specific focus on formaldehyde (HCHO) and volatile organic compounds (VOCs) as major contributors to sick building syndrome (SBS). The study aims to measure using the World Health Organization (WHO) process test method and compare the concentrations of HCHO and TVOC indoors and outdoors, assess the indoor temperature levels, evaluate the airtightness performance, and analyze the impact of these factors on IAQ. The research was conducted in Yasmeen Tower and Al Wahat Tower in Ajman Al Jurf area. The results showed that in Yasmeen Tower, unoccupied one-bedroom units had high concentrations of HCHO and TVOC. The average HCHO concentration was 198 μg/m 3 , with the highest recorded concentration at 265 μg/m 3 . The average TVOC concentration was 1,244 μg/m 3 . In Al Wahat Tower, even higher levels of HCHO were observed. The highest recorded concentration reached 445 μg/m 3 , with an average of 323 μg/m 3 . Airtightness performance was assessed, with the effective leakage area ranging from 139 cm 2 to 301 cm 2 for the 7 units, averaging at 193 cm 2 . Onebedroom units exhibited higher airtightness. Correlation analysis revealed a strong relationship between room temperature and both HCHO and TVOC concentrations, indicating that higher room temperatures were associated with increased pollutant levels. Moreover, improved airtightness performance correlated with decreased HCHO and TVOC concentrations. The findings emphasize the importance of effective ventilation systems, temperature control, and airtightness measures to mitigate indoor air pollutants and enhance IAQ in multi-unit dwellings. The study provides valuable insights for policymakers, architects, and residents to address IAQ concerns and promote healthier indoor environments. However, the study's limitations should be considered, and further research is recommended to broaden the understanding of IAQ in residential buildings.

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Section: Introductionmentioning

confidence: 99%

Correlating Temperature, Airtightness, and Pollutant Concentrations: Insights into Indoor Air Quality in Ajman Apartment Buildings

Jung,

Awad,

Ismail

et al. 2024

Future Cities and Environment

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“…Renovation measures have been evaluated in various literatures; however, the results have relied on simulation data [19][20][21][22][23][24][25][26]. A literature review conducted by Ma [27] has ascertained that the majority of prior studies were conducted through numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse Gas Payback Time of Different HVAC Systems in the Renovation of Nordic District-Heated Multifamily Buildings Considering Future Energy Production Scenarios

Khadra,

Akander,

Myhren

2024

Buildings

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The European Union (EU) has implemented several policies to enhance energy efficiency. Among these policies is the objective of achieving energy-efficient renovations in at least 3% of EU buildings annually. The primary aim of this study was to offer a precise environmental comparison among four similar district-heated multifamily buildings that have undergone identical energy efficiency measures. The key distinguishing factor among them lies in the HVAC systems installed. The chosen systems were as follows: (1) exhaust ventilation with air pressure control; (2) mechanical ventilation with heat recovery; (3) exhaust ventilation with an exhaust air heat pump; and (4) exhaust ventilation with an exhaust air heat pump with a Photovoltaic (PV) panel. This study involved a life cycle assessment that relied on actual material data from the housing company and energy consumption measurements. This study covered a period of 50 years for thorough analysis. A sensitivity analysis was also conducted to account for various future scenarios of energy production. The findings revealed that the building with an exhaust air heat pump exhibited the lowest greenhouse gas emissions and the shortest carbon payback period (GBPT), needing only around 7 years. In contrast, the building with exhaust ventilation without heat recovery showed the highest emissions and the longest carbon payback period (GBPT), requiring approximately 11 years. Notably, the results were significantly influenced by future scenarios of energy production, emphasizing the crucial role of emission factors in determining the environmental performance of distinct renovation scenarios.

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Insulation performance improvement for drywall using highly insulated steel studs with slots

Kwon,

Yu,

Nam

2024

Case Studies in Thermal Engineering

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Techno-economic feasibility study for deep renovation of old apartment

Cited by 6 publications

References 40 publications

Correlating Temperature, Airtightness, and Pollutant Concentrations: Insights into Indoor Air Quality in Ajman Apartment Buildings

Correlating Temperature, Airtightness, and Pollutant Concentrations: Insights into Indoor Air Quality in Ajman Apartment Buildings

Greenhouse Gas Payback Time of Different HVAC Systems in the Renovation of Nordic District-Heated Multifamily Buildings Considering Future Energy Production Scenarios

Insulation performance improvement for drywall using highly insulated steel studs with slots

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