Enables continual energy audit, energy performance monitoring,drawing baseline, normalization and M&V. Extremely useful for ESCO project intervention & decision making. Contact Avijit.Choudhury@Cenergist.com for demo of the platform

1. Energy Audit and
M&V of HVAC
BY CONTINUOUS MONITORING THROUGH
ENMAX_GI_VER2.0
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2. What is it?
 It’s a platform created for “Energy & Sustainability” group/ top
management of the industry/ building owners.
 It serves multiple purposes like-
a) Drawing energy baseline of any equipment/system/sub-process
or the entire establishment
b) Display EnPIs or Efficiency parameters instead of power
consumption/fuel consumption values
c) Capture the variables and normalize performances
d) Calculate savings of ENCON projects against the drawn baseline
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3. How it is different from others
Conventional System Our System
It’s energy data monitoring & targeting tool It’s Energy Audit cum M&V platform
All clients who want monitoring system/MIS tool may be considered
as potential clients
Clients who want detailed energy audit and want to go for ENCON
intervention need this platform
Doesn’t report energy performance or efficiency of critical
equipment
Reports real time energy performance/ EnPI/ Efficiency of identified
equipment/systems
Doesn’t display energy baseline of HVAC nor the EPI of building Draws energy baseline of HVAC and display whole building EPI
(Energy Performance Index)
Doesn’t capture variables (building heat load, ambient temp & RH
etc.)
Captures all variables and co-relate them with energy performance
Can’t do baseline normalization Normalization technique is in-built
Doesn’t certify energy savings in case of ENCON project/ ESCO
interventions
Authenticates & certifies savings as per the ESCO or EnMS (ISO-
50001) protocol
Doesn’t contribute to investment decision regarding retrofit
interventions
Enables client in investment decision making process
Effective only for heating application Useful for both heating & cooling application
3

4. MRV Elements of HVAC
65
16
14
5
%
Compressor Water Pumps AHU (with FCU) Cooling Tower (Fan)
Important to
know Energy
Distribution of
whole system
4

5. Module wise data display
Chiller
kW/ ton
Compressor
power profile
% loading
of chiller
Refrigerat
ion load
(ton)
5

6. Module wise data display
AHU
Number
of FCU on
Number
of
Blowers
on
FCU wise
Power
Consumption
Blower wise
Power
Consumption
6

7. Module wise data display
Pumps
Hydraulic
Efficiency
Pump On
/Off
Water
Flow rate
Pump wise
Power
Consumption
7

8. Module wise data display
Cooling
Tower
Ambient
Temp
FAN On
/Off
Ambient
RH
FAN wise Power
Consumption
8

9. EnPIs for ESCO
Maximum Theoretical Heat
Lod
(100%)
Building
Heat Load
(% loading) % Loading of
Chiller
Room Temp
Maintained
(Zone wise)Total
Power
consumptio
n (kWh)
Ambient RH
Ambient
Temp
9
HVAC Specific
Power Consumption
(kW/TR)
EnPI = TR/SQ Meter

10. Baseline based on captured data
0
0.5
1
1.5
2
2.5
PLR-1 PLR-2 PLR-3 PLR-4
PLF Vs. PLR Curve
Old HVAC New HVAC
10

11. Chiller Performance Table (kW/ TR values)
% Loading/
Temp
100% 87.5% 75% 62.5% 50% 37.5% 25%
32.23 C .625 .633 .635 .652 .686 .750 .950
30.00 C .605 .597 .601 .618 .652 .714 .835
27.78 C .571 .565 .571 .588 .621 .681 .803
25.56 C .539 .536 .544 .561 .593 .652 .775
23.34 C .511 .510 .519 .536 .566 .623 .748
21.12 C .484 .485 .494 .510 .539 .595 .724
18.89 C .459 .462 .470 .484 .512 .567 .700
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12. Plotting of Variables – deriving correction factors
0
2
4
6
8
10
12
32.2 C/ 62% 37.7 C/ 84% 43.3 C/ 97%
Effect of Ambient Condition on Energy Performance
EER Vs. Temp EER Vs. RH Expon. (EER Vs. Temp)
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13. Certification of Savings
Baseline data by ENMAX Data collect by ENMAX after Intervention
Running
Hrs.
Power
consumption
(kW)
Avg. SPC
(kW/TR)
Running
Hrs.
Power
consumption
(kW)
Avg. SPC
(kW/TR)
Actual
Savings
(kW)
Correction
Factor (%
loading)
Correction
Factor (RH
& temp)
Notional or
Certified
Saving (kW)
April H1 P1 E1 H2 P2 E2
S =
(P1 – P2) CF1 CF2
SC =
(E1-E2) X H1 X
CF1 X CF2
May
June
July
August
Sept
Total
Savings
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14. Investment Decision Flow Chart
14
Is my HVAC System
Energy Efficient?
Does it require any
intervention?
Look at monthly and
yearly average data of
kW/TR (building SPC)
Compare the value with
– OEM guaranteed value,
efficiency curve,
benchmark value
If the gap is substantial
then investigate further
Whether all the units are
inefficient or inefficiency
lies in some particular
unit?
Select Chiller Unit. Study
the monthly & yearly
EnPI (kW/TR)
If the gap is meaningful
look at Individual
Equipment Efficiency/
Power Consumption
Compress
or kWh
kWh & Ƞ
Chilled
Water Pump
kWh & Ƞ
Condenser
Water Pump
CT Fan
kWh
M

15. Pick Compressor
15
Compressor
High Impact
Factor
Large Gap Medium
Impact Factor
Low Impact
Factor
High Investment
Annual Savings (Large)
Life Cycle Savings
(Large)
Pay Back Period
(moderate)
(Indicator for technical
dept)
Simple ROI (good)
(Indicator for finance dept)
IRR (attractive)
(Indicator for banker)
Investment Decision
(High Priority)
Intervention

16. Pick Cooling Tower Fan
16CT Fan
High Impact
Factor Medium Impact
Factor
Low Impact Factor
High Gap
Low Investment
Annual Savings
(Moderate)
Life Cycle Savings
(High)
Pay Back Period (very short)
(Indicator for technical dept) Simple ROI (High)
(Indicator for finance dept)
IRR (attractive)
(Indicator for banker)
Investment Decision
(High Priority)
Intervention

17. Final Investment Decision
17
Carry out similar analysis
for AHU
ENCON Project Decision
Making for whole HVAC
system
Compressor Part-
Outsourced to ESCO
CT Fan Part-
Own financing & own
Intervention AHU Blower Part-
Own Intervention &
Bank Financing

18. THANK YOU
FOR YOUR ATTENTION
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