Operational Recovery Opportunities · Module 7
Identified savings — Somerset Greenways
Findings from the ASHRAE Standard 211 Level 3 audit and continuous IoT monitoring. Each opportunity is tagged to the standard that supports its measurement or maintenance regime, with an estimated impact and priority.
Aggregate recovery · 460.2 MWh/yrEstimated value · ₹39.57 L/yr
IPMVP Option B · ASHRAE Std 180
Convert primary pumps to Variable Primary Flow (VPF)
3× 7.5 kW primary pumps are constant-flow. Add VFDs and a decoupler-free VPF sequence; modulate to load. Estimated 32–38% pump-energy cut on the primary loop.
Effort
Medium
Impact
High
Est. energy
68.4 MWh/yr
Est. value
₹5.88 L/yr
IPMVP Option B · ASHRAE Std 180
ApprovedRetrofit isolation with all parameters (IPMVP-B). Pump maintenance/commissioning aligns to Std 180 §5.
ASHRAE Std 211 L3 · IPMVP Option D
Enable cooling-tower fan modulation (condenser-water reset)
CT VFDs are present but locked at 45 Hz. Enable dynamic condenser-water reset targeting min(chiller + CT-fan) kW. Typical 6–10% chiller-plant kW/TR improvement.
Effort
Low
Impact
High
Est. energy
112.0 MWh/yr
Est. value
₹9.63 L/yr
ASHRAE Std 211 L3 · IPMVP Option D
In ProgressLevel-3 investment-grade recommendation; validate through calibrated simulation (Option D).
ASHRAE Std 180 · ASHRAE Std 211 L3
Recover low chilled-water ΔT (1.9°C actual vs 5–6°C design)
AHU/FCU 3-way valves, oversized coils and low secondary-loop diversity are producing severe low-ΔT syndrome. Convert 3-way to 2-way, retro-commission coil controls, add differential-pressure reset.
Effort
High
Impact
High
Est. energy
184.0 MWh/yr
Est. value
₹15.82 L/yr
ASHRAE Std 180 · ASHRAE Std 211 L3
IdentifiedHVAC inspection/maintenance regime (Std 180) + Level-3 audit finding (Std 211).
IPMVP Option B
Sequence legacy Carrier centrifugal behind magnetic-bearing chiller
Carrier 19DV at 0.68 kW/TR runs high in stack. Re-sequence so York YMC² leads, YVAA screw follows, Carrier trims. Consider replacement of Carrier in year 3.
Effort
Low
Impact
Medium
Est. energy
41.6 MWh/yr
Est. value
₹3.58 L/yr
IPMVP Option B
ApprovedChiller-isolation savings measurable against baseline plant kW/TR.
ASHRAE Std 180
Occupancy-linked load control via keycard
Keycard reader does not isolate FCU, in-room fridge or washing-machine circuits. Rewire to isolate high-draw loads on check-out / unoccupied state. Cuts standby vampire load.
Effort
Medium
Impact
Medium
Est. energy
54.2 MWh/yr
Est. value
₹4.66 L/yr
ASHRAE Std 180
IdentifiedBuilding system maintenance & controls best-practice (Std 180 §6).
IPMVP Option B · ASHRAE Guideline 14
Install BTU meter on chilled-water header
Currently no BTU meter — TR-hour billing and dMRV rely on modelled cooling from chiller kW × observed kW/TR. Installation removes ~40% of measurement uncertainty on the cooling side.
Effort
Low
Impact
High
Est. energy
—
Est. value
—
IPMVP Option B · ASHRAE Guideline 14
ApprovedDirect measurement collapses uncertainty; required to move CV(RMSE) into the tightest G14 band.