African Design Magazine ADM #38 March 2018 | Page 44

BIM SIMULATION
With regard to the design criteria for energy
saving buildings in South Korea revised in
2015, the construction sector accounts for
approximately 36.0% of the total in energy
performance index (EPI) evaluation items, 50
points. However, because other evaluation
items such as building layout, floor plan,
natural lighting plan, and ventilation plan are
divided into recommendations, architectural
planning characteristics cannot be reflected.
Additionally, 33 points of the construction
sector were obtained from the average heat
transmission coefficient of outer wall, roof,
and living room floor on the bottom floor,
and even this can be divided into values by
insulation and material performance.
Therefore, it is difficult to expect energy
saving plans by scale, form, and design in
the early architectural plan in designing.
The Building Energy Consumption Evaluation
Report also requires heating, hot water
supply, air-conditioning, illumination,
ventilation, and sums for items such as
energy requirement per unit area, energy
consumption per unit area, and the primary
energy consumption per unit area. Therefore,
in reality, energy performance according to
design methods such as building scale and
form and design is not considered.
According to the regulations of the
certification criteria for building energy
efficiency rating in Korea revised in 2015,
the energy efficiency to certificate office
buildings follows international standards
such as ISO 13790 which is a representative
steady-state thermal load calculation
method. In addition, the evaluation is
performed by energy consumption per
unit area (kWh/m2) and annual primary
energy consumption per unit area (kWh/
m2) calculated using programs created
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to comprehensively evaluate heating, air
conditioning, hot water supply, illumination,
and ventilation. However, it is a fact that
this method is also more appropriate for
evaluating architectural equipment and
insulation performance than for evaluating
construction plans.
Materials and methods
Although many studies related to the
development of design methods for energy
saving have been carried out, little research
has been conducted on design elements
such as building form, and most studies
focus on exterior design elements such
as awnings and electrical and mechanical
equipment [3]. In order to remedy this
problem, the area of this study was set to the
early design stage in the conceptualisation
stage. In addition, the scale, design, and
performance according to rough use of
buildings were determined using BIM
to make rational decisions. This study
aimed to explore methods for supporting
environmentally friendly and low-carbon
design through energy performance
analysis from the conceptualisation stage.
Accordingly, the study area was limited to
the architectural design elements capable
of being extracted using BIM tools in the
conceptualisation stage among passive
architecture design [1].
As a research method, this study aims to
analyse the architectural design hierarchy
to develop green BIM design methods
based on energy performance by analysing
architectural design elements required to
determine mass design in the early design
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