3.5 MW Solar Rooftop for Trilogi Logistics, Dubai
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Solar PV Rooftop Design and Installation
Trilogi-Mega DC, a premier international logistics company, was exploring possibilities to install a solar PV rooftop system for their warehouse. Operational since 2018, the facility consists of a warehouse, office building, and security building. The objective for installing the PV system was to reduce the carbon footprint of the facility.
With Consistent’s expertise in solar engineering, it was engaged for the design and supervision of the project. Consistent provided Engineering, Authority approvals and Supervision for the Rooftop Solar PV system.
The total built-up area of the warehouse is 301,390 sq. ft. With the available roof area of 28,000 sq. m., 9500 solar Panels were installed generating a total of 3.51MW energy. This resulted in an operational cost saving of AED 708,650 per Quarter!
Consistent developed the design and got it approved from DEWA and Coordination related to the inspection approval and obtained Kwh energy meters from DEWA.
Challenges
The primary challenge was the allocation of space for installing the inverters and PVDB’s as per space given by the client.
Team Consistent had a series of discussions with clients and authorities were coordinated in determining the location for the Inverters and AC combiner boxes as per Shams Dubai/DEWA DRRG regulations. The cable route from AC combiner boxes to meter cabinets/ LV panels needed to be designed without disturbing the existing cables.
And finally, the installation of the system was to be carried out without disturbing the facility operations.
Design Approach & Solutions
Team Consistent implemented a design development process using ‘PVSyst’ software simulating the maximum possible energy generation. The selection of material was analyzed considering 20 years of operation and sustainability parameters.
Installation of panels was planned in a way to minimize the effects of shadow, while the orientation worked to maximize the yield. The AC-DC ratio was maintained at 1.17%.
Cable route from AC combiner boxes to kWH meter normally runs through buried ducts and manholes. As the existing manhole has limited space to pull the new cable from AC combiner boxes to meter cabinet, Team Consistent recommend to Contractor to increase the manhole size and shift the meter cabinet in possible way to terminate the 300mm2 armoured cables, the inverter was located above the Electrical room to minimize cable losses.
A well-designed system can make a lot of difference in the lifespan of a solar PV system.
Considering DEWA DRRG regulations as the baseline, these solutions were implemented with a view to regulating system performance and payback period.
The Difference We Made
After taking into consideration all the above parameters, Consistent was able to complete the project One month ahead of schedule.
Not only was the performance of the system satisfactory, but in the first quarter, the system generated a yield 7% greater than anticipated, i.e. 1487.70 MWh. The anticipated savings in energy bills for the client are around AED 2,327,300 per annum.
Furthermore, Team Consistent received appreciation from the client, and was engaged for upcoming projects.
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