Project Green District Energy Feasibility Study - Partners in Project ...

Bldg. No.1: Hilton Garden Inn
Basic Building Data
Building Name Hilton Garden Inn
Building Address 3311 Caroga Drive
Building Use Hotel
Hours of Operation 24/7
Total Building Area 13,477 m² (145,000 ft²)
No. of Stories 15 above grade/2 below
Current Installed Capacity 1,230 kW heating/885 kW DHW
Building Age 2009
Age of Equipment Same
Building HVAC System Description:
The Hilton Garden Inn has a two-pipe distributed heat pump system that provides heating and
cooling to the hotel rooms. The heat for the heat pump loop is provided by two (2) Lochinvar
natural gas fired boilers each rated at 515 kW (1,759.5 MBH output/2,070 MBH input);
additional heat in the heat pump loop is rejected through a cooling tower (approximated at 250
ton capacity). The boilers are located in the basement mechanical room. There are 290 Trane
water source heat pumps throughout the building with a total installed capacity of 1100 kW
heating and 250 tons cooling.
Two additional hot water boilers, Lochinvar natural gas boilers rated at 100 kW each (340 MBH
output/400 MBH input) supply the space heating for the basement levels, the pool/hot tub
heating, and the snowmelt systems.
There are three (3) separate DHW systems, each comprised of two boilers and two storage
tank; one system each for the laundry, the lower floors (basement to the 6 th floor), the upper
floors (7 th – 15 th floors). The DHW systems are located in the basement and penthouse
mechanical room.