=+10-34.

center court yard 40 ft (12 m) square. There are 16 apartments, each to be cooled with a nom-

inal 1 ton fan-coil unit requiring 2.25 gpm (0.142 L/s) of chilled water with 45 F (7 C) enter-

ing temperature and 55 F (13 C) leaving temperature. There is a basement equipment room located in one corner of the structure. The owner wants high reliability and redundancy in case of equipment failure.

(a) Layout in a sketch on a plan of the building a suitable water distribu-

tion system. On a separate sketch show the layout for the source elements and the chillers, and a sketch of piping to a typical apartment.

(b) Assuming that drawn copper tubing will be used.

what size will be required for the main lines leaving and returning to the source elements? (c)

Estimate the required head and capacity for the main distribution pump assuming that valve.

fitting, and coil losses are the same as losses in the tubing.

A large office complex consisting of four buildings is located on a plot +-mile square with a