- 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.
Kohinoor Teiko Hinjewadi Phase 2 Pune E-Brochure.pdf
Qi Square: Digitizing Energy Efficiency Through Virtual Audits
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
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
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
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