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Measurement & Verification / Residential

Re-Establishing Delta T Surcharge Baseline and Cost Target Savings for a Massive Tower in DIFC

Our technical expertise has led to the development of a new delta T baseline and target cost savings for a retrofitted tower in DIFC

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Background Story

 



 

The tower is recognized as one of the most iconic structures in the United Arab Emirates (UAE). It is an 80-story skyscraper located in the Dubai International Financial Centre (DIFC) and is a mixed-use building designed for offices, residential, and retail purposes. Given the condition and capacity of the tower at the time, there was an opportunity for significant improvements through the integration of advanced, contemporary technologies and upgrades to the current equipment and systems.​

To reduce their overall energy consumption, the client reached out to Ark Energy to run an Energy Efficiency Retrofit Project, as well as Delta-T Rehabilitation. The objective of this program is to reduce the client's energy consumption, lower their operational costs, and eliminate Delta-T surcharges. After implementing the energy efficiency retrofit, the ESCO commenced the measurement and verification (M&V) reporting process. It was observed that ESCO is not accurately reflecting the achieved cost savings from enhancing delta T compared to the target savings.


 



 

Challenge




The issue stems from the ESCO sticking to the year 0 (pre-retrofit) delta T surcharge baseline for comparison with the year 2 achieved delta T surcharge and the initial target savings suggested for the year 1. Solving the delta T issue should be performance-driven, meaning the baseline might change from year to year based on the building's performance after implementing ECMs to enhance delta T. Thus, the only constant should be the target delta T in degrees Celsius, not the target cost savings. The baseline and target cost savings should be adjusted to account for the latest achieved delta T performance and surcharge, accurately reflecting enhancements based on performance levels.

 

Main Objective




The primary objective is to accurately reflect the impact of enhancing delta T on tower delta T surcharge and accurately assess the achieved cost savings compared to target savings.

 

Approach


 

The Ark Energy team, serving as a client consultant, collaborated with both the Client and the ESCO to reassess the delta T surcharge baseline and target cost savings, ensuring accurate M&V reporting by IPMVP guidelines. This step was carefully crafted to enhance the accuracy and reliability of M&V reporting, with a primary focus on precisely reflecting the actual and target cost savings from enhancing delta T. Some of the key measures that were utilized include the following:
 
  • Capturing the latest data on delta surcharge over 12 months that should be serving as the new baseline 
  • Re-assesses the target cost savings based on target delta T of 9 degrees Celsius using Ark Energy advanced Tool
  • Updating the M&V plan to reflect the new baseline and target cost savings
 


Results



The results that were generated from the project include the following:
 
  • Precisely reflecting the achieved cost savings (AED) by ESCO
  • Precisely reflecting the delta surcharge reduction (AED)
  • Easily assessing the monetary implication on ESCO and Client as per ESPC contract

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