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Specialized Technical Services / Residential

Recommissioning of a Residential Building in Dubai Marina​

Discover Ark Energy’s Proven Approach to Streamlined Re-Commissioning

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Background Story
The client owns a 43-story residential building in Dubai Marina, comprising a mix of two-bedroom and three-bedroom apartments, as well as penthouses. The building underwent an energy retrofit project, projected to generate 1 million AED in annual energy savings. However, the ESCO handed over the building without providing essential documentation, including Testing & Commissioning (T&C) reports, as-built drawings, and the Operations & Maintenance (O&M) manual. To ensure the sustained achievement of these savings and a smooth transition of control over the energy conservation measures, the client engaged Ark Energy.

Ark Energy was tasked with facilitating a proper handover by the ESCO, optimizing the building’s system functionality, identifying and implementing O&M improvements, and training the building’s O&M and FM staff to operate its assets efficiently.

Problems
During the project, post-data collection, a key issue identified was the Chiller Management System (CMS) sequence of operation. In certain cases, two chillers were running simultaneously when a single chiller could have handled the load efficiently.

Additionally, the condenser temperature setpoint was misaligned with Dubai’s dew point temperature, affecting system efficiency. The chiller plant also exhibited operational and maintenance challenges, including excessive water consumption, indoor air quality and comfort complaints, and malfunctioning cooling towers.

Figure 1 Chiller Operation from  BMS data 

Source: Ark Energy Analysis
Main Objective
Following the client’s commissioning activities, they requested Ark Energy to conduct a recommissioning process to ensure optimal system performance. After gathering the necessary data and interviewing the facility management team, Ark Energy developed a recommissioning plan aimed at optimizing the building’s operation and maintenance (O&M) while maximizing the functionality of its HVAC system.

The central chiller plant was the primary focus of the recommissioning investigation, which concentrated on the following equipment:


Approach
Ark Energy team have conducted Re-commissioning services on the central chiller plant systems which included:
  • Reviewing existing control sequences, set points, and trends
  • Developing and perform functional testing procedures on selected HVAC equipment
  • Developing a corrective action plan (CAP)
  • Assisting Owner in implementing CAP
  • Performing follow up functional testing of systems after repair and provide functional test summary
  • Developing commissioning report containing functional test results, additional standardized functional test procedures and recommendations for additional enhancements.

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