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Energy efficiency measures - Institutional - Electrical equipment - Fans - Motors / United Kingdom

Case study assignment

A swimming pool is ventilated to the exterior using single-speed fans for the supply air and the exhaust air. Both fans operate continuously during the 16 h/d that the pool is open to the public and during unoccupied hours.

Base case

• Supply fan has 7.9 kW electricity load with a duty cycle of 100%
• Exhaust fan is 6.1 kW electricity load with a duty cycle of 100%
• Fuel rate: electricity £0.035/kWh

Proposed case

• Decrease the electricity load of the supply fan during normal operation to 7.3 kW
• Reduce the electricity load of the supply fan during reduced flow operation to 1.2 kW
• Decrease the electricity load of the exhaust fan during normal operation to 5.8 kW
• Reduce the electricity load of the exhaust fan during reduced flow operation to 1.2 kW
• Cost for modifications is £2,100

Prepare a RETScreen study, documenting any assumptions that you are required to make, and report on the significant conclusions from this analysis.

Solution

The worked-out solution is the data file selected from within the RETScreen Project Database. The user automatically downloads the Project Database file while downloading the RETScreen software.

Similar project

During a 1990 refurbishing of a swimming pool in Woodbridge, Suffolk, UK, two-speed fans and variable speed drives were evaluated to replace existing single-speed fans. Two-speed fans were proposed as they generated similar energy savings at a lower cost.

Real project (5.93 MB)