Project Update: Mississippi State University Chilled Water Loop

In mid-2016, Mississippi State University hired CDFL engineers to proactively analyze their campus chilled water system, identify problem areas, and propose potential solutions for both immediate and long-term functionality. CDFL utilized its Campus Utility Modeling System to digitally analyze the existing equipment and piping infrastructure capacities. The system analysis revealed that expansion or up-sizing of the underground piping system would be required to satisfy anticipated future cooling requirements. Our engineers, in collaboration with MSU staff, considered multiple options to relieve these capacity concerns. Eventually, it became clear that the best option was to bisect the existing loop with a pair of chilled water lines, creating two sub-loops.

CDFL provided MSU with valuable data, plans, and schematics to assist in the decision making process.

This option, however, was not without challenges. The proposed chilled water lines would need to route through MSU’s iconic Drill Field: a central area of campus with both historic and aesthetic significance. As alumni of MSU, our mechanical engineers knew the importance of protecting the beautiful campus centerpiece and traditional pipe installation methods would result in potential permanent damage to the area.

MSU’s Drill Field
Picture courtesy of Mississippi State University. 

Our engineers and MSU staff explored alternative installation methods, deciding ultimately to pursue a design utilizing horizontal directional drilling. With this method, a drill rig, operated from one end of the pipe run, bores an underground path for the pipe. The full length of high-density polyethylene pipe is assembled above ground and pulled into the bore by the drill rig. This method allows all of the work to be completed with minimal impact to the surface of the Drill Field.

Construction for this project began early this summer. Currently the first of two parallel bores is being drilled and the HDPE pipe is assembled and awaiting testing before it is pulled to the depths of the Drill Field, far below the feet of thousands of students above. Once in service, the new pipes will alleviate current concerns and support the campus in its continued growth.

Currently, two 1600 foot long pipes lay above ground, awaiting testing and transportation to their final service locations.

We look forward to the completion of this project later this year and thank MSU for the opportunity to participate in an interesting and innovative project!