The Hyatt Regency Maui is a 632,000-square-foot, 815-room hotel. This $1.4 million project involved the renovation of mechanical and plumbing systems serving the resort, including heating the swimming pool (approximately 1 million gallons and a half acre of surface area). Because the island of Maui is subject to some of the nation's highest costs for electricity, fuel oil, and propane, many cost-effective, energy reducing features were incorporated.
|Maui Electric Energy Efficiency Award|
|2001 Excellence in Engineering Award, ASHRAE Illinois Chapter|
|2002 Technology Award, ASHRAE Region VI (first place)|
|2003 Society-Level Technology Award, ASHRAE (first place)|
Energy that would otherwise have been rejected to the atmosphere through the building's cooling towers was recovered from both the chilled water and condenser water systems and reused for the purposes described below.
The domestic hot water heating system uses a 96.7-ton heat pump to recover heat from the building's chilled water return mains, and then transfers that energy to the domestic hot water system. This process also cools the chilled water return, so less energy is consumed by the chillers and cooling towers.
Lowered demand on the steam boilers for domestic hot water led to a significant decline in fuel oil consumption after this system became operational.
The swimming pool heat recovery system uses a plate-and-frame heat exchanger to recover heat from kitchen refrigeration units and the central plant chillers to heat the resort's swimming pools.
Renovation also included new, energy efficient chillers and upgraded mechanical room ventilation to comply with ASHRAE Standard 15.