Page 79 - GRIHA Manual Volume III - Introduction to National Rating System
P. 79
72 GRIHA Manual: Volume 3
# Software must be able to perform hourly calculation for the whole year (8760 hours) and
provide outputs like inside space temperature, relative humidity, and so on.
# The simulation shall take the hourly variation in occupancy, lighting power, and equipment
power defined separately for each day of the week and holidays.
# It should be able to model the effects of thermal mass.
# The software should be able to model at least ten thermal zones.
Simulation procedure for AC and
non-AC buildings
1. Develop a virtual model of the
building in the software with the
help of architectural drawings and
other requisite information.
2. Define schedules of lighting,
equipment, chiller plant, fans, and
miscellaneous equipment.
3. Create appropriate weather
files, which would specify outdoor
design conditions in a format
compliant with the relevant
software. Figure 10 Software snapshot showing building model
4. Ensure that data related to all
the mandatory compliances of
ECBC (as discussed earlier in this
document) have been fed in the
software.
5. Enter the building internal loads—
lighting loads, equipment loads,
people loads, occupancy schedule
in a specific format for each zone as
shown in figure 11.
6. Based on the data shared by the
project team (architect, HVAC
consultant, and building owner),
develop the base model of the
building. Figure 11 Software snapshot showing the format for entering
Till step 6, the simulation procedure is building internal loads
similar for both AC and non-AC type of
buildings. Henceforth, the steps differ for AC and non-AC buildings.
For Ac buildings
7. In case of air-conditioned buildings, the thermal comfort conditions are specified in ‘Part-8
Building Services; Section 3, Air-conditioning, heating and mechanical ventilation, section
4.4.3 inside design conditions, National Building Code 2005, BIS,’. These conditions should be
met for 100% of all occupied hours.
# Software must be able to perform hourly calculation for the whole year (8760 hours) and
provide outputs like inside space temperature, relative humidity, and so on.
# The simulation shall take the hourly variation in occupancy, lighting power, and equipment
power defined separately for each day of the week and holidays.
# It should be able to model the effects of thermal mass.
# The software should be able to model at least ten thermal zones.
Simulation procedure for AC and
non-AC buildings
1. Develop a virtual model of the
building in the software with the
help of architectural drawings and
other requisite information.
2. Define schedules of lighting,
equipment, chiller plant, fans, and
miscellaneous equipment.
3. Create appropriate weather
files, which would specify outdoor
design conditions in a format
compliant with the relevant
software. Figure 10 Software snapshot showing building model
4. Ensure that data related to all
the mandatory compliances of
ECBC (as discussed earlier in this
document) have been fed in the
software.
5. Enter the building internal loads—
lighting loads, equipment loads,
people loads, occupancy schedule
in a specific format for each zone as
shown in figure 11.
6. Based on the data shared by the
project team (architect, HVAC
consultant, and building owner),
develop the base model of the
building. Figure 11 Software snapshot showing the format for entering
Till step 6, the simulation procedure is building internal loads
similar for both AC and non-AC type of
buildings. Henceforth, the steps differ for AC and non-AC buildings.
For Ac buildings
7. In case of air-conditioned buildings, the thermal comfort conditions are specified in ‘Part-8
Building Services; Section 3, Air-conditioning, heating and mechanical ventilation, section
4.4.3 inside design conditions, National Building Code 2005, BIS,’. These conditions should be
met for 100% of all occupied hours.
