Difference between revisions of "Water Systems"

Revision as of 03:49, 13 July 2017

Many TRIUMF devices are water cooled. The main magnet, beamline magnets, magnet power supplies, RF components, cryogenic pumps, and other equipment, all produce excess heat that must be removed.

In order to protect sensitive and high voltage devices, cooling water is specially treated to remove unwanted ions. This increases the water’s resistivity, resulting in low conductivity water (LCW.)

Due to differences in devices, radiation levels, plumbing, and location, there are many separate LCW systems. These LCW systems are all cooled by the raw (regular, or non LCW) water system.

Although each LCW system is different, the basic design is the same. The following simplified diagram shows the typical setup of an LCW system:

LCW cooling system. Typical LCW cooling loop configuration.

Heat is transferred from a device into an LCW system. A heat exchanger passes this heat from the LCW system to the raw water system. The raw water system has a cooling tower which allows the excess heat to escape into the atmosphere.

The main components of an LCW System are:

Pumps to circulate the water in the loop.
Heat Exchangers to allow the transfer of heat from one water system to another while keeping the water isolated.
Resin Cans to remove ions to maintain low resistivity.
Surge Tanks which act as a shock absorber and water reservoir.

The raw water system contains:

Pumps.
Heat Exchangers.
Cooling Tower to remove heat from the water.

The cyclotron LCW systems are:

Aluminium Active (AL-ALCW)
Copper Active (Cu-ALCW)
Copper Non-Active (Cu-LCW RF)
Meson Hall (Cu-LCW MH, or MH-LCW)
ISIS (ISIS-LCW)

The LCW systems are manually filled from an LCW storage tank. This LCW storage tank is filled using distilled water from a still. The raw water system is automatically filled with city water.

XT page 2P “Water System Pressure, Temp, Conductivity, Tank Level” is the main source for the current conditions of cyclotron water systems.