Dissolved Oxygen Control

Overview

Dissolved oxygen control is a water quality management technique used in pure water coolant systems for ICT liquid cooling. Reducing dissolved oxygen in the coolant inhibits aerobic bacteria proliferation and suppresses the corrosion tendency of metal materials, contributing to safer and more stable long-term system operation.

TCT describes two methods for controlling dissolved oxygen. The first, dissolved oxygen solidification, uses oxygen-adsorption resin on the MPM to capture dissolved oxygen — achieving a residual oxygen level of 0.06 mg/L (6 ppm), with a 3–5 year lifespan, zero wastewater generation, and no electrical energy requirement. The second, dissolved gas peel-off, uses a membrane degassing method that achieves a lower residual oxygen level of 0.1 mg/ml (10 ppb) but requires 1.2 kW/MW and is more expensive than the resin approach.

TCT's preferred method is dissolved oxygen solidification: it is cheap, customizable, compact, and resource-free, making it well-suited for integration into the MPM cartridge alongside conductivity and pH control.