Commissioning of an office building - REHVA · 2014-06-23 · –Other feeders like UPS, plug...
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Commissioning of an office building Guruprakash Sastry Regional Manager – Infrastructure [email protected]
Transcript of Commissioning of an office building - REHVA · 2014-06-23 · –Other feeders like UPS, plug...
Commissioning of an office building
Guruprakash Sastry
Regional Manager – Infrastructure
A typical office building 2
Time
Design phase
Construction phase
Occupancy
The problem
• Commissioning of a building is the most neglected
– No time?
– No interest? (O&M teams are happy if comfort is met)
– No understanding – commissioning for most people is ‘switching on’ equipments.
• Efficiency is a design issue only !
• Commissioning agent – one more vendor?
• HVAC contract split into many vendors for “commercial reasons” – single point
responsibility for the system missing.
3
Examples
Case 1
• VAVs
– VAV supplied by one vendor
– VAV installation by another vendor
– BMS integration by a third vendor
– How to ensure efficiency of the
system?
4
Examples
Case 2
• Chilled beams
– Technical details sometimes missed out
by consultants
– Chamber pressure Vs air flow Vs
nozzle type
– How to ensure efficiency of the
system?
5
HVAC Optimization
Reduce Heat Gain
Energy simulation
Efficient heat
transfer mechanism
Efficient system
Equipment configuration
Efficient equipment
Control strategy
Continuous monitoring
HVAC energy
6
Optimization strategy
Day lighting and Glare control – Glass and shading
Day light pane
View pane
External shading
Smart glazing
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8
I Innovation-x Impact of day lighting 8
Lighting system design & operation 9
1,2
0,68
0,5 0,45
0
0,2
0,4
0,6
0,8
1
1,2
1,4
Average 2007levels
SDB-5 MYS SDB-1 TVM SDB-1 HYD
W/s
qft
Installed Lighting Power (W/sqft)
0,45
0,17
0
0,2
0,4
0,6
0,8
1
1,2
1,4
Average 2007 levels SDB-1 HYD
W/s
qft
Operating Lighting power (W/sqft)
Design Vs Actual
Efficiencies
Benchmarking
Monitoring of key parameters – over time 10
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Monitoring of key parameters – over time
16 11 2013
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Monitoring of key parameters – over time
Recommendations
• Get the commissioning team on board at design stage – earlier the better
• Commissioning should be followed by continuous monitoring
• Energy meters for every major equipment
– HVAC system – chillers, pumps, fans
– Lighting feeder
– Other feeders like UPS, plug loads, misc.
• Continuous monitoring of key parameters (hourly) Vs design.
– kW/TR of HVAC system
– Operating LPD of lighting
– EPI of the building (kWh/sqm per year) to be monitored against design/simulation
– Acceptable deviation to be defined
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Building energy performance 14
An
nu
al
kW
h/s
qm
2008
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