HVAC Construction Project:
Electric Chillers Installation in Corporate High-Rise
Chief Engineer at Boston Properties
The base building’s existing steam absorption chillers, that provide the large-tonnage central air conditioning, had served beyond its useful life and needed to be replaced. After judicious consideration of all the factors, the client opted to replace their existing absorbers with new electric chillers. Electric chillers offer a number of key benefits such as higher COP (Coefficient of Performance), lower equipment purchase cost, a 50% savings in required floorspace, shorter installation time, and overall reduced energy consumption for added cost savings.
Serving a long list of premier tenants, it was important to the client that the project be completed in a timely fashion, avoiding both unscheduled downtime and additional costs.
Donnelly Mechanical won the competitive bid and was awarded the project, which included:
- Project planning, 3D modelling, and management;
- Removal of the existing steam absorption chillers from the mechanical room on the 13th floor;
- Managing the rigging;
- Hoisting and installing two new electric chillers (900-tons & 2050-tons) to the 13th floor mechanical room;
- Installing critical electrical equipment to power the new chillers;
- Installing 3 Liebert split system A/C units on the 61st & 63rd floors (to cool critical electrical equipment);
- Modify and reconfigure ductwork and piping.
Having provided accurate estimates, Donnelly completed the project on-time and within budget. Donnelly’s BIM capabilities and strategic alliance with Elite CAD Designs facilitated detailed 3D modeling to ensure successful project planning and logistics. Donnelly’s expert project management and attention to safety kept workers and equipment safe throughout this challenging installation project. Additionally, all work sites, including the mechanical room, were left clean and fully operational at the conclusion of the project.