Cooling loads analysis of Multimedia Spaces of composite climate

1. TO UNDERSTAND COOLING LOAD OF MULTIMEDIA
LECTURE THEATRE
A case of University of Allahabad
Area of Research
Energy Efficiency in Institutional Buildings
Presented by : Ar. Kanika Verma

2. What is MULTI MEDIA LECTURE
THEATRES…??????A Multi Media lecture hall (or lecture theatre) is a large room used for instruction ,sharing and
learning, typically at a college or university , enabled with audio video and other equipment required,
not only for the immediate physical teaching environment but for the virtual environment it connects to
store and share with.
WHAT IT IS NOT……
SPATIAL REQUIREMENTS
PURPOSE OF ORIGIN
Presented by : Ar. Kanika Verma

3. SPECIFICATIONS AND REQUIREMENTS of MULTI MEDIA LECTURE THEATRE
Presented by : Ar. Kanika Verma

4. What is COOLING LOADS
TOTAL COOLING LOAD
The cooling load is anhourly rate at
which heat must be removed from a
building in order to hold the indoor
air temperature at the design value.
In other words, cooling load is the
capacity of equipment required to
account for such a load.
EXTERNAL
COOLING
LOAD
INTERNAL
COOLING
LOAD
Presented by : Ar. Kanika Verma

5. ExperimentSetup _ Layout and Position Variation
Model 1- Lecture Theatre is exposed
30% to external environment
Model 2- Lecture Theatre is exposed
50% to external environment
Model 3- Lecture Theatre is exposed
70% to external environment
Presented by : Ar. Kanika Verma

6. ExperimentSetup _ Material Assembly Variation
Presented by : Ar. Kanika Verma

7. SimulationModels _ Combinations and Iterations
Type A Type B Type C Type D Type E Type A Type B Type C Type D Type E
Type A Type B Type C Type D Type E
x
xx
Audi1 Audi 2
Audi1 Audi 2 Audi1 Audi 2
0° 270°
90° 180°
x
x
x
0° 270°
90° 180°
0° 270°
90° 180°
Total Combination of Simulation models of Lecture Theatre for both Audi 1 & 2 are 120
Presented by : Ar. Kanika Verma

8. Appendix_ Graphs of CoolingLoad Results
Presented by : Ar. Kanika Verma

9. OBSERVATIONS- Internal Vs External Load
The Cooling load comparison on June
10 clearly represents that the internal
loads are constant throughout the
model iterations, only external load
varies with change of external exposure
and material bundles. Hence, internal
loads are keeping constant and
significant share in total cooling load.
External Load is effectively responsible
for the variation of total cooling load
across the time, which varies from 28%
to 46% of the total cooling load at any
given point of time of the day. This
Variation depends on different material
bundles, as the heat ingress is control or
reduce by change of material or by
adding insulation.
A B C D E
GraphcomparingInternal &External CoolingLoadofAudi 1
54.4%
45.6%
6%
6% 18%
15%
10%
24%
24%
21%
21%
20%
16%
26%
24%
22%
A B C D E
GraphcomparingInternal &External CoolingLoadofAudi 2
54.4%
45.6%
3%
5%
18%
15%
11%
24%
23%
21%
19%
19%
16%
25%
24%
22%
Presented by : Ar. Kanika Verma

10. OBSERVATIONS- Material Bundle Comparison
Material Bundle comparison shows
that Bundle Type C and Type E at
the peak load day of the year have
minimum heat gain from envelope,
in comparison to Type A, B and D for
all model variations. Type C in
comparison to Type E has 0.5 to 1%
reduction in total cooling load,
Though annual total cooling load
comparison suggest that Material
Bundle Type B has minimum
cooling load across the year. The
possible reason for the difference is
the absence of insulation on walls,
help dissipating the heat load back
to the environment when the
substantial load generated is
internally, not externally.
0° 90° 180° 270° Average
Annual Total Cooling Load comparison Graph
Presented by : Ar. Kanika Verma

11. OBSERVATIONS– Impact of Orientation
Analysis of the results of all combinations of
Model Type and Material Bundles for all four
coordinal directions represents that the
orientation has less significance in terms of total
cooling load(refer graph 7,8). For Any direction
the internal load is significant and constant, even
external loads are not varying with the change of
direction. There is no considerable impact of
orientations as the building has closed
environment and has less variations on the
buildingskin.
Presented by : Ar. Kanika Verma

12. OBSERVATIONS- Wall Type Comparison and Impact of Insulation
Single 230mm thick walls with insulation
in comparison to single 230mm wall
without insulation help reducing 40-46%
cooling load at the maximum load of the
day for all orientations. The range slightly
varies for different model exposure, for
30% the reduction is 41-46% for four
orientations, for 50% the range is 42-45%
only and for maximum exposure of 70%
the effect of insulation is 40-44%
reduction in cooling load. Similarly, Cavity
walls with insulation in comparison with
cavity walls without insulation have an
impact reduction of 38-41% for all four
orientations. The reduction for 30% wall
exposure is 40-41%, for 50% reduction is
39-40%, and for 70% exposure the
reduction in cooling load is 38-40%.
Graph 7
comparing
Cooling
Load from
walls of
Audi 1
Graph 8
comparing
Cooling
load from
walls of
Audi 2
Presented by : Ar. Kanika Verma

13. CONCLUSION
The simulation test results help us to figure out certain findings that are applicable to similar buildings
placed in the similar context. First, Internal loads have constant and significant share in total cooling
load. External Load is effectively responsible for the variation of total cooling load across the time,
which varies from 28% to 46% of the total cooling load. Impact of orientation on building total cooling
load is very minimum, an architect or designer can invest time and resources on other things like
materials to create a difference. Annual Cooling load comparison explain that Model 2 have 50%
external exposure have the lowest values for Lecture Theatre 1 for all the orientations and is
comparable with Model 1 for Audi 2. Hence, the position of Lecture Theatre can determine the exposure
and model type. Wall provided with insulation are performing best for the summer load and have
effective reduction in the total cooling load. Observations made through study can summarize that the
building envelope has an effective role in controlling the cooling load for multimedia type buildings, but
substantial share is from internal load of the building.
Submitted by :
KANIKA VERMA
M.Arch (Sustainable Architecture), CEPT University
B.Arch University School of Architecture and Planning (TVBSHS)