Case Study: Sheraton Mall of the Emirates Hotel, Dubai

Estimated energy saving of AED 90,000 per year 
 

This impressive 5-star hotel in central Dubai features more than 480 guest rooms and 9,000 square feet of event space. Energy bills were found to be out of line with other hotels operated by parent company, Marriott.

The challenge

Although the 25-storey hotel was fitted with Grundfos pumping systems for water transfer and air-conditioning, investigations by the Hotel’s engineering and facilities management teams found the central ‘brain’ of the air-conditioning pump system, an ‘intelligent’ unit controlling three 75 Kw TP pumps, had been bypassed by the original contractor. The challenge was to reinstate this whilst maintaining full system operation throughout.

The solution

Working closely with the hotel’s engineering team, Grundfos energy specialists installed and connected a new differential pressure sensor on the 25th floor via a 500-metre cable to pumps in the basement. They then retrofitted a new and improved CU352 ‘intelligent’ constant pressure control unit with new IP communication module and individually connected variable frequency drives, without disrupting system operation. Finally, they aligned the modified controller within the Building Management System to optimise the performance of the entire system. Post installation monitoring showed that pump demand had virtually halved – far exceeding the hotel team’s expectations, whilst Investment was
minimal, limited largely to labour and re-cabling.

Outcome

Estimated energy saving 210,240 kWh/year; improved system efficiency; very short ROI.

Sheraton Mall of the Emirates Hotel, Dubai
Milk Processing Plant, Turkey

Case Study: Milk Processing Plant, Turkey

65% reduction in energy usage
Turkey’s leading dairy company, Sutas, needed to improve energy efficiency at one of its two major Turkish processing facilities, as part of its ongoing drive to improve sustainability and reduce costs.

Water pumping station, UAE

Case Study: Water Pumping Station, UAE

24% reduction in energy usage
Handling around 60,000 cubicmetres of waste water a day, this municipal Water Pumping Station in the UAE was inefficient, expensive to operate and required a high level of maintenance to maintain process security.

Dubai World Central, Dubai

Case Study: Dubai World Central, Dubai

Secured water supply
With an ultimate annual capacity of 160 million passengers, DWC is set to become the largest airport in the world. Problems in the system supplying fresh water to the complex were causing frequent breakdowns and noisy operation, affecting staff and travellers alike.