Hyatt Regency Princeton

Central Plant Equipment Replacement

Central Plant Equipment Replacement

Overview

Hyatt Regency Princeton is a 323,900-square-foot hotel with 348 rooms. This project replaced the hotel's aging central plant equipment, including chillers, heating boilers and domestic hot water heaters, improving reliability and energy efficiency. Construction was phased over six months from October 2012 through March 2013, allowing the work to be completed without impacting service delivery or guest comfort.

Awards

Source Award
2014 Excellence in Engineering Award, ASHRAE Illinois Chapter.

Features

The chilled water plant upgrade consisted of the installation of two 32- ton centrifugal chillers and chilled water pumps. Equipment was selected based on a life cycle cost analysis that considered first cost, refrigeration energy, pump energy, and maintenance costs. Features of the system include:

  • Variable speed chillers with an NPLV rating of 0.393kW/ton
  • Conversion to variable primary chilled water pumping
  • Chilled and condenser water temperature reset
  • Continuous calculation of plant operating efficiency (plant kW/ton tracked hourly, daily, weekly, and monthly)

The heating boiler plant upgrade consisted of the installation of two high-efficiency condensing boilers with stainless steel heat exchangers, modulating burners, and an efficiency as high as 95%. The domestic hot water plant upgrade included the installation of three high-efficiency condensing boilers with stainless steel heat exchangers and modulating burners and an efficiency as high as 98%, along with four insulated hot water storage tanks.

The cost savings realized from these projects include:

  • The hotel's existing building automation system was outdated and could not support the new central plant equipment. A new vendor installed a building automation system to control the central plant equipment. Cost savings of over $100,000 were realized compared with upgrading the existing building automation system.
  • Gas savings of approximately 20% of the hotel's total usage have been realized throught the first 4 months of operation of the new high-efficiency heating boilers and water heaters.
  • Electric savings of approximately 12% of the hotel's total usage have been realized through the first 3 months of operation of the new chilled water plant.
  • The hotel was awarded approximately $55,000 in incentives from  the local utility due to the energy efficiency measures incorporated in the design of the new systems.