Current Status of Aged Public Buildings and Effect Analysis Prediction of Green Remodeling in South Korea

Abstract

The purpose of this study is to analyze the scope of the expected improvement effect of office buildings and educational research facilities according to green remodeling. Thus, in order to quantitatively grasp the architectural performance of the existing buildings, the building thermal performance, the airtightness, the indoor environment, and the air quality were measured using equipment. The analysis indicated that the envelope performance and the indoor environment were unsatisfactory compared to the current legal standards, and for indoor air quality, CO2 and formaldehyde were measured to be dissatisfactory in some buildings. The energy analysis results indicated that the improvement range differed according to the renovation history for each building, resulting in differences in the energy-saving rate for each alternative. The reduction rates of primary energy consumption using energy simulation were 38.5–67.4% for office buildings and 23.7–66.3% for educational research facilities, and the payback periods were 14 to 27 years for office buildings and 12 to 30 years for educational research facilities. These results are expected to contribute to the activation of green remodeling because they can be used as indicators to predict the expected construction cost, the payback period, and the expected effect required for green remodeling.

Remodeling as a circular approach in built facilities: an assessment of lifecycle factors towards successful delivery

“…The remodeling period estimation can be calculated as a summation of the normal duration of construction in addition to correction values and risk attributes. Nam et al (2021) analyzed the expected improvement effect of office buildings and educational research facilities, which have undergone green remodeling, quantitatively using measures of indoor environmental qualities. The findings indicated that the performance of these facilities were unsatisfactory, according to the legal requirements and standards.…”

“…A scope may define the zones (indoors, outdoor, levels of work) and remodeling depth (e.g. structural, configurational, equipment and furniture) (Nam et al, 2021) Remodeling built facilities be technical (e.g. environmental, engineering), functional (e.g.…”

“…These could be ranging from greening, restoration, refurbishment, and restatement of built elements towards creating functional and formation purposes. This definition adds to the original descriptions of remodeling projects, in the literature, where remodeling is viewed as an escape from new construction of built facilities, due to higher cost and time drawbacks (Kwanyup, 2021; Nam et al. , 2021).…”

Current Status of Old Housing for Low-Income Elderly Households in Seoul and Green Remodeling Support Plan: Economic Analysis Considering the Social Cost of Green Remodeling

“…The benefit of air pollutant material reduction is also a social benefit generated by the reduced consumption of electricity and energy. The calculation method is the same as that shown in Equation (3) [22]. The social cost of air pollutants was referred to as the social cost per MWh for nitrogen oxide, sulfur oxide, and dust by air pollutants in the preliminary feasibility report of "Smart Grid Expansion Project (2015)" of KDI.…”

“…However, this GR is not a measure that can be adopted by all owners of old buildings, because of the high initial construction cost which requires about 10 years (relatively long term) to recover the construction cost [22]. This is particularly true for low-income elderly households who experience a relatively large impact on energy bill burden, indoor environment, and air pollution.…”