Observe how Ark Energy resolved the Delta-T issue present in a local building in Dubai
The client owns a high-quality commercial and residential skyscraper located in DIFC, Dubai, UAE. It is characterized by a gross area of 300,871 m2 of mixed-use spaces, including 25 commercial stories, 48 residential stories, and a total conditioned area of 192,711 m2. The tower has the capacity and potential to integrate significant energy efficiency improvements through the deployment of technology and equipment upgrades, as well as detailed energy management.
Ark Energy was engaged to develop and execute a Delta-T rehabilitation project, energy retrofit project, and digitalization of energy management to reduce overall energy consumption, eliminate Delta-T surcharges, and digitize their O&M. The total energy cost for the tower between May 2018 and April 2019 was 19.4 million AED, detailed below by energy source. On average, the tower was paying 2.63 million AED annually in Delta-T surcharges.
The Tower’s consumption profile
The main objective of this project was to alleviate the Client from the Delta-T surcharges through the implementation of ideal low Delta-T Solutions and carry out a Detailed Engineering and Design, Procurement, Installation, and Commissioning activities for the said ideal low Delta-T solution.
The Tower’s monthly energy cost distribution during the period od 2018 to 2019, 000’AED
The Client was suffering from low Delta-T syndrome and paying up to 2.0m AED in surcharges. Delta-T surcharges were waivered twice by the district cooling operator, provided that the building is undergoing a proper Delta-T rehabilitation. A Delta-T study investigating the low figure and presenting possible solutions to rectify the issue, was conducted.
Ark Energy applied a structured six-step approach to get the most optimal solution for low Delta-T rehabilitation. As a first phase in the activity, an Engineering Analysis and Operational Review was conducted, where the collected data were analyzed and reviewed to recommend mitigation measures for low Delta-T. From the analysis, the following steps were conducted as part of the methodology:
From the works done, the following findings where presented:
In the second phase of the project an analysis was conducted to pinpoint the point sources of the Low-Delta T Syndrome. Ark Energy carried out a detailed site measurement and testing to determine the main causes behind the Delta-T issues. From the systematic approach, 19 different causes for low Delta-T that have been assessed based on capital constraints and technical criteria
A sample of the different possible causes for the Low-Delta T, with their severity presented
Ark Energy carried out a Detailed Engineering and Design, Procurement, Installation, and Commissioning activities for six (6) Delta-T solutions
The Delta-T solutions presented, in mix with other ECMS provided, resulted in the Client to aim to reduce their energy consumption by 10.7% with a payback period of 2.2 years
The following solutions presented in the analysis
The results that were generated from the project include the following:
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