8.1 Site Description

The site consists of a number of buildings, including a professional office building and commercial space. It was originally constructed in the late 1940s and early 1950s. The powerhouse includes the following:

• Two 13.2-kV electrical services delivering power to a single location and conjunctively billed by the electric utility. The services include a tie-breaker so that either service can carry the entire load.

• Two multi-fuel boilers (natural gas and No. 2 fuel oil) rated at 25,000 pph (11,350 kg/h) and operated at 145 psig (999 kPa). They were installed in 1950.

• A single multi-fuel boiler rated at 18,000 pph (8,172 kg/h), which was installed in the mid-1980s.

• A waste incinerator equipped with heat recovery and rated at 5,000 pph (2,270 kg/h), which was installed in the late 1980s. Natural gas is used in the incinerator for start-up and stabilization.

• A 700-ton (2,464-kW), two-stage absorption chiller.

• A 1,000-ton (3,520-kW) electric-driven chiller.

The boilers are approaching the end of their economically useful life and are scheduled for replacement in the late 1990s. In addition, the hospital is in the midst of a major expansion program, adding between 70,000 and 150,000 ft ² (6,500 and 13,900 m ²), and will need additional cooling capacity. These incremental loads were scheduled to be on-line in 1996.

Purchased power is provided by two electric services that are conjunctively billed. The incoming services are linked by a normally open...