SENTRY TCU Temperature Control Unit (Chiller)

TCU is a temperature control unit that brings sample water to the target temperature and is used with a secondary cooling system. Pumping and cooling controls are inside the unit; the manufacturer states that water can be cooled to within 0.5 °C of the target. It is used on power plant sample panels to keep the sample going to the analyzer at a constant temperature.

• Nominal capacity of 3, 5, 8, 10 and 15 tons; the largest model provides 52.7 kW of cooling.
• Heating capacity from 3.2 to 15.8 kW, water flow from 114 to 568 L/min.
• The A series is air-cooled and the W series water-cooled.
• Operating status is monitored with displays, warnings and alarms.
• Can be built for outdoor use without reduced performance.

Spiral tube and tube-in-tube heat exchangers and cooling water isolation and mixing skids complete the system.

In a two-stage cooling arrangement, the TCU works as the second stage: in the first stage the sample cooler takes most of the heat, and the TCU fixes the temperature precisely at the target. This approach reduces the effect of temperature changes on analyzer results.

Tetra selects the right capacity and air- or water-cooled type according to the heat load. Our field team handles cooling water connections, carrying electrical and alarm signals to the control room and initial startup; refrigerant and pump maintenance are included in the annual service plan.