A Case Study of an Energy Efficiency project in a Mid Sized Apartment complex Saxena & Raja Sekhar Midway City Owner’s Association Moderators: Pradeep Rao, CEO, Siant Energy Solutions Pvt. Ltd. R.K.Iyer, M.D., Yieldopia Energy Pvt. Ltd.

1. Energy Efficiency in Apartments
A Case Study of an Energy Efficiency project in a
Mid Sized Apartment complex
Saxena & Raja Sekhar
Midway City Owner’s Association
Moderators
Pradeep Rao, CEO, Siant Energy Solutions Pvt. Ltd.
R.K.Iyer, M.D., Yieldopia Energy Pvt. Ltd.

2. Property Details
 Concorde Midway City
 Located near Electronic city
 5 Acres Campus
 7 Blocks
 240 Apartments

3. Problem Statement
 Our Common area lighting needed upgrade to improve
visibility for residents
 We needed to improve the lighting ,save energy and get
decent payback on investment from the savings

4. Approach Taken
 Energy Audit – study of energy usage patterns and
identification of major common power consuming
items
 Data Oriented – use monthly bills as reference
 Employ a gradual process
 Analyze and present the results
 Get buy in from all residents
 Plan next steps

5. Monthly Power Bill
We had monthly bill of Rs.2.2 Lakhs for common
power consumed by
 Common area lighting
 Waste Treatment Plant (WTP)
 Lifts

6. Implementation
Following measures were taken
 Analyzed all the 8 BESCOM bill, later performed load balancing
 Replaced 6 Sodium lights (1000W) each ~20 (14-24 watt CFL’s)
 Replaced all the 26 pole lights from 200w bulbs with 65W or 85W CFL’s
 Each Block have 2 lifts, shutting down smaller lift in each block from 11 pm till 6 am.
 We have water indicator for Raw water, Treated water, and overhead tank for each
block, Once the water reaching ~40% in overhead tank of each block, we were
stopping WTP motors (5hp)
 Bore well motors (4 to 12 hp) were also stopped once RAW water tank is filled with
~60% capacity.

7. RESULTS
 The project resulted in cutting our monthly bills by
nearly 25%
 This definitely met our expectations (maybe
exceeded?)

8. Possible next steps
 Use of LED Lighting for common areas
 Rooftop Solar for Common area lighting , Power Back
up , WTP motors , pumping of water
 Use of Power conditioning equipment
 Use of Inverters for WTP motors
 Use of Micro Wind energy , where feasible

9. THANK YOU!