ZEMCH 2015 - International Conference Proceedings | Page 105
Table 2: Capital Expenditure of MUCB and MUGB
Description
MUCB (M0) cost
MUGB (M1) cost
New Building and structures 3 x 3 m
5.922,00RM
5.625,90RM
Walls
1.700,00RM
1.938,00RM
Finishes
1.656,00RM
1.573,20RM
Door and Windows
1.390,00RM
3.981,06RM
Roof and Roof Covering works
3.696,00RM
3.416,20RM
Painting Works
1.020,00RM
969,00RM
Electrical
3.425,00RM
3.253,75RM
Solar (DC-run light generation)
Total
760,00RM
18.809,00RM
21.517,11RM
A different approach has been used to estimate the operating costs (OPEX), as at the time of
the research both buildings were not connected to electrical supply yet. Due to the lack of past
data about the real operating expenditure of the two case studies, the researchers simulated the
buildings’ performances through a comprehensive building simulation tool. The software used
is is a widely used whole-building performance simulation tool known as eQUEST. The software
needs the development of an underlying model. Hence, the following design parameters have
been inserted: The buildings’ location and orientation, dimension, envelope insulation, finishing,
building operation schedule and interior end-uses are the parameters. Both buildings have been
considered a residential single-family area type with an operation schedule of 24-hours per day
over the entire year.
The yearly operating costs of both MUCB (M0) and MUGB (M1) resulting from the output of the
simulation are shown in Table 3. The highest position within the electricity consumption are the
cooling costs derived from the different active cooling demand of both buildings. Due to the fact
that M1 is about 2.4 degree C cooler than M0, it will also consume less energy to cool the house
down to an acceptable maximum tropical thermal comfort level of 28.6 degree C during the day
respectively the heat peak hours (Wagner 2013):
Table 3: Yearly Operating Expenditure of MUCB (M0) and MUGB (M1)
MUCB
MUGB
Water consumption (RM/Year)
42,07
42,07
Electricity consumption (RM/Year)
233,33
146,53
Total (RM/Year)
275,39
188,59
4. Analysis
In order to develop a comprehensive financial model for the two investigated compared buildings, the analysis proceeds in three phases. The first step is to set up the financial model by doing
some basic assumptions related to the Malaysian financial market. Afterwards, the future cash
flows are projected: operational, investment and financing cash flows are evaluated on a yearly
basis throughout the whole buildings’ life cycle. Finally, a multivariate analysis is conducted to
create different scenarios and evaluate the building’s financial measures by changing some independent variables.
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