Human Settlements Review - Parliamentary Monitoring Group

Human Settlements Review, Volume 1, Number 1, 2010
The energy required to provide thermal
comfort in the case of Kuyasa type houses for
4 months of the year between the times of, for
illustration, morning and afternoon periods of
occupancy, is predicted using the calibrated
(and validated) model. For the purposes of
illustration, the level of thermal comfort is
reached for morning and evening periods for 4
winter months. The amount of energy required
to heat the house without the ceiling is A and
AI. The current level of energy utilized is C and
CI. The energy required to warm the house
with the ceiling and ceiling insulation is B and
BI. The current suppressed demand for space
heating energy services can be expressed as
follows:
Suppressed demand = (A-C)–(B-C) *
morning period + (AI-CI)-(BI-CI) * evening
period
The resulting values are shown in Figure 5.
Figure 5 Graphical representation of suppressed demand in thermal performance of housing
Thermal power required to reach 21 o C
A
B
C
Thermal energy
required in
houses without
ceilings
Suppressed
demand for
thermal energy
Thermal energy
required with
ceilings and
ceiling
insulation
Current level of
heating
Outdoor ambient
winter’s day
temperature profile
A I
B I
C I
morning
evening
Therefore, the suppressed demand baseline
for a CDM project activity that installs ceilings
and ceiling insulation, is the predicted
emissions scenario in houses that achieve an
indoor temperature of 21°C in the absence
of ceilings, even if the current actual indoor
temperature and thus actual energy use
is lower. The degree to which the heating
service is suppressed is expressed as the
difference between actual energy use (status
quo or suppressed demand) and energy use
necessary to reach the 21°C (satisfied level of
service or unsuppressed demand). A crucial
assumption is that with increasing income
before the installation of ceilings would be
possible, an increasing amount of energy
would be consumed as the households’
income progresses, in order to increase
thermal comfort.
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