make the most of your energy head office – case study
TRANSCRIPT
Make the most of your energy
Head Office – Case Study
Schneider Electric 2- Division - Name – Date
Consumption
Fixed Costs
Studying Utility Bill
Schneider Electric 3- Division - Name – Date
Bill divided to two main Parts
Consum
ption
Fixed Costs
Consumption Summary
kWh
Seasonal Load Analysis
Schneider Electric 4- Division - Name – Date
On 24/7
manually operated
No supervision or control
Installing Control System
Setup operating strategy
Setup an operating schedule
Lighting Control
Before After
Offices
Basement
Outside Lighting
saving will be around 57% from the Lighting consumption which is about 20% from total consumption monthly
Schneider Electric 5- Division - Name – Date
21006
16209
Lighting Effect Graph
Schneider Electric 6- Division - Name – Date
Air CooledChiller
Air Handling Unit
Fan Coil Unit
CHWS
CHWR
Insulation
CHW Pumps
HVAC System
Schneider Electric 7- Division - Name – Date
Opportunities of Saving in HVAC System
Chillers
• 2 Chillers each is 250 ton
Air Handling Units
• 4 AHU’s with different capacities
Fan Coil Units
• 109 FCU’s with different capacities
Building Envelope
• Doors, infiltrations and windows
Chiller Tuning
Kwh
Time
Setpoints
saving will be 14% from the consumption of the chiller and 1% from the total consumption
Schneider Electric 8- Division - Name – Date
Opportunities of Saving in HVAC System
Chillers
• 2 Chillers each is 250 ton
Air Handling Units
• 4 AHU’s with different capacities
Fan Coil Units
• 109 FCU’s with different capacities
Building Envelope
• Doors, infiltrations and windows
Opportunity-we have different sizes of FCU’s each have different Capacity with a specified amount of water for each Capacity
Audit action:-balancing the system by adjusting the amount of water Entering each fan
Saving will be 6% from total consumption
Schneider Electric 9- Division - Name – Date
Opportunities of Saving in HVAC System
Chillers
• 2 Chillers each is 250 ton
Air Handling Units
• 4 AHU’s with different capacities
Fan Coil Units
• 109 FCU’s with different capacities
Building Envelope
• Doors, infiltrations and windows
Opportunities:1- AHU serving Training room2- AHU serving LAB
Recommendations:1- For Training room installing 2 split units and occupancy sensors in which the payback will be with in 12 months.2- For LAB installing occupancy sensor in which the payback Period will be a month.
saving will be around 33% of the Air Handling Units Consumption and 3% from total consumption
Schneider Electric 10- Division - Name – Date
Opportunities of Saving in HVAC System
Chillers
• 2 Chillers each is 250 ton
Air Handling Units
• 4 AHU’s with different capacities
Fan Coil Units
• 109 FCU’s with different capacities
Building Envelope
• Doors, infiltrations and windows
Doors:-the building had 139 doors.
Infiltration:-parts of the suspended ceiling is opened.
Windows:-windows subjected to direct sunlight with no curtains gain a lot of heat.
All the above lead’s to reach the setpoint due to heat loss which make the system run in it’s maximum capacity
Schneider Electric 11- Division - Name – Date
Bill divided to two main Parts
Consum
ption
Fixed Costs
Recommendations-Peak shaving using PLC with BMS and it’s payback will be in a month
5434
6194
Zero
KW
Saving will be 6% from the average monthly bill
Schneider Electric 12- Division - Name – Date
Action Winter savings
Summer savings
Investments(EGP)
Expected Payback years
Date to execute
Web energy expanding - - 20,000 - Nov 09
Lighting 20% 10.5% 1500 Nov 09
Total for lighting 15 % 21,500 8 months
AHU’s - 3% 10,000 Dec 09
Chiller - 6% 2,000
Building Envelope(windows + doors) - - 24,000 Oct 09
Total for HVAC 5 % 36,000 2 years
taxes 3% 2% - -
Fixed Costs 15% 1.5% 2,500 2 month Dec 09
Saving summary in bills & ROI investment calculations