case study - portfolio management ENERGY MANAGEMENT
the case
Portfolio Management A multinational company that manages more than 30 major buildings in 6 different countries wanted to optimize energy control and management for its entire portfolio. Edifícios Saudáveis developed accurate benchmarking systems calculating KPI’s for each building as a whole and for each of its main energy systems. Using these KPI’s, leaders and laggards were identified (independently of climate, size and usage patterns. Both types were audited, inefficiencies quickly detected and good practices disseminated (using system KPI’s). Up to 2,5 M€ savings are foreseen (10% of the company total energy costs), leading to a less than 2 year project payback.
Whole building benchmarking
Quick track of leaders and laggards
Whole Building Benchmarking (actual energy use / KPI)
0,75
1
Leader (energy use lower than KPI)
0 1
2
3
4
5
6
7
8
9
10 11
12 13 14 15 1
1,44 Laggard (energy use higher than KPI)
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
System benchmarking
Quick detection of inefficient systems, enabling effective and focused action.
System Benchmarking (actual energy use / KPI)
2
1
0
Chillers
Cooling Towers
Pumps Pumps (Condenser) (Primary)
HVAC
Pu (S
Critical System (largest deviation from KPI)
umps AHU Secondary)
Mall
Enclosed Carparks
Lighting
Outdoor Carparks
Technical Corridors
System benchmarking (laggard)
System benchmarking highlighted a high-level of energy inefficiency in secondary circuit pumps. Immediate resetting of differential pressure drop resulted in 45% savings.
Dayly energy consumption [kWh per day]
2000
1500
1000
500
0
1
Pumps (secondary circuit)
45% Reduction
2
3
4
Before
5
6
7
8
9
10
11
After
12
13
14
System benchmarking (leader)
System benchmarking highlighted low energy use for enclosed carparks lighting, enabling effective and focused investigation to detect and disseminate good-practices (design and operation).
System Benchmarking (actual energy use / KPI)
1
0
Chillers
Cooling Towers
Pumps Pumps (Condenser) (Primary) HVAC
Pu (Se
umps AHU econdary)
Leader System (Lowest ratio actual consumption / KPI)
Mall
Enclosed Carparks Lighting
Outdoor Carparks
Technical Corridors