For NCSU, the utility master planning vision to bring central campus chilled water generation and distribution became a reality with the construction of the Yarbrough thermal energy plant. RMF worked closely with the University to develop a 20-year comprehensive chilled water master plan for the 100 year old campus. The establishment of a large district chilled water plant adjacent to the existing Yarbrough steam plant was the first phase of this strategic plan.
This award winning facility was designed to provide chilled water to the densely populated east campus via five, 2,000 ton electrical and steam turbine driven centrifugal chillers. RMF utilized 3D modeling tools for selection of plant options, both above and below ground features were modeled including cooling tower and oil storage tank layouts as well as underground utility corridors. RMF also performed detailed project commissioning on this facility including plan review and development of equipment testing criteria and operator training manuals.
Benefits include improved energy efficiency, greater reliability, and reduced operating costs relative to decentralized cooling systems.
- Chilled water and condenser water header arrangements provide maximum reliability and allow any combination of chiller, tower, and pump to be utilized.
- Structural beams span the width of the operating floor to avoid use of access impinging columns, while bridge cranes support chiller compressor and pump motor service removal.
- Power is reliably served from a dedicated 15KV medium voltage feeder configured as a loop circuit with dual path services through two transformers and double-ended switchgear .
- Thermal utility engineering included pipe stress analysis modeling per ASME B31.1 and expansion design.
- Condenser water filtration allows reduces tower blow-down requirements and aid in water conservation.
- Plant controls provide kW/ton efficiency display for system operators to promote optimally efficient operation.
- Load aggregation allows the installed capacity to be 35% lower than decentralized systems and reduces refrigerant use on campus.