- Buildings account for 40% of global energy consumption and governments will spend $22 trillion retrofitting buildings to save energy over the next 20 years as building footprints increase dramatically. - Qi Square's virtual audit tool uses a digital twin, energy model calibration, and simulated energy conservation measures to remotely assess building energy performance and identify savings opportunities, providing a more cost-effective and scalable alternative to on-site audits. - A case study shows their virtual audit of a Singapore shopping mall where the digital twin was accurately calibrated according to industry standards and simulated measures showed energy savings between 10-50% with payback periods of 3.8-6.7 years.

1. Digitising Energy Efficiency
through Virtual Audits
Nilesh Y. Jadhav
Co-Founder & CEO
Qi Square Pte Ltd, Singapore
Future Energy Show, Thailand 2019
27 Nov 2019

2. Market Context
 Buildings are the largest consumers of
energy on the planet – 40%
 Over the next 20 years, governments and
private players will spend $22 trillion
on retrofits in buildings to save energy
 Rapid urbanization will increase the
building footprint to 1.7 times current
number by 2040 (4.2 trillion sq. ft.)
*Data source: 2018 IEA Energy Efficiency Market Report

3. Our Mission
Energy intelligence to simplify decision making in the built environment
Virtual
Audits
Green
Certification

4.  Manual Performance Assessment
 Heavy Reliance on Expertise
 Trial & Error Approach
 Limited Stakeholder Engagement
Digital Twin
Augmented
Intelligence
Our Solution: Virtual Audits
A performance assessment tool
to uncover energy efficiency
improvements in buildings
remotely

5. Time
Money
Holistic
Accuracy
At scale,
across portfolio
in no time
50-70% faster than
on-site audit
Cost-effective
60-80% cheaper than
on-site audit
Accurate Results
ASHRAE Level2 equivalent,
IPMVP compliant
Whole Building
System-level interaction
of Energy Conservation
Measures for planning
Virtual Audits: Value Differentiators

6. Virtual Audits: Methodology

7. Virtual Audits: Process-I
Data Collection
Digital Twin
setup
Energy
Conservation
Measures (ECMs)
Implement
ECMs
 1 year of energy
consumption data
 Building details
 Optional short survey
 Optional sensors
placement
 Add weather, GIS,
occupancy, etc. data
 Create energy model
 Model calibration
 Data analysis
 Simulate ECMs
 Assess overall impact
 Retrocomissioning
 Retrofitting
 Calculate Financials
(Payback, ROI)
Prioritisation support
Constitutes an ASHRAE Level2Audit
* ASHRAE:American Society of Heating, Refrigeration Engineers

8. Virtual Audits: Process-II
Complies with IPMVP Option-D
verification of energy savings
Verification of
Savings
* IPMVP: International Performance Measurement andVerification Protocol
 Calibrated simulation with
implemented ECMs
 Data Analysis
Implement
ECMs

9. Case Study: Virtual Audits
3D Virtual Model
Digital Twin Creation: Suburban Shopping Mall, Singapore
 Building data
 Overall: address, GFA, function
 Architectural, Structural: CAD drawings, BIM
 Mechanical & Electrical: layouts, equipment specs
 Operational data: schedules, profiles
 Energy Consumption data
 Multiphysics Dynamic Simulation
 Integrated withWeather Data
 Building data integrated

10. Case Study: Virtual Audits
Calibration Metric/Errors Achieved
Required-
ASHRAE
Required-
IPMVP
Normalised Mean Bias Error (MBE)- Overall
Monthly
0.73% ± 5% ± 20%
Coefficient of Variation of the Root Mean Square
Error (CVRMSE)- Overall Monthly
1.38% 15 --
NMBE- Overall Hourly 0.01% ± 10% ± 5%
CVRMSE- Overall Hourly 12.01% 30% 20%
NMBE- Cooling Energy Monthly 1.33%
CVRMSE- Cooling Energy Monthly 2.56%
Digital Twin Calibration
Calibration to
well-known industry
standards

11. Case Study: Virtual Audits
Energy Breakdown Analysis

12. Case Study: Virtual Audits
Energy Demand & Renewables Integration Analysis

13. Case Study: Virtual Audits
Energy Conservation Measures Analysis
Savings % Capex Payback
10% $ 0.7 mil. 4.2 yrs
20% $ 2 mil. 3.8 yrs
30% $ 3.3 mil. 4.5 yrs
40% $ 5.3 mil. 5.7 yrs
50% $ 8.2 mil. 6.7 yrs
Energy Conservation Measures are a mix of
a) Retrocomissioning: operational changes
b) Retrofits: involve capex
c) Combination of ECMs can be simulated,
e.g. Solar PV effect on heat reduction

14. Virtual Audits: Live
Real-time data analysis tool focused on energy performance improvement
New launch!
http://live.qi-square.com

15. Case Study: Virtual AuditsLive Verification
Measurement & Verification using actual data

16. Thanks
Looking for partners to digitize Energy Efficiency together
Nilesh Jadhav
nilesh@qisquare.sg
http://www.qisquare.sg