Delta T is the temperature difference between two selected points in a cooling system. In mining, the term is commonly used to compare the temperature of air or coolant entering and leaving equipment or a specific cooling component.

For example, if coolant enters a cooling block at 30 °C and leaves at 35 °C, the Delta T is 5 °C. This means that the coolant temperature increased by five degrees while passing through the equipment.

How Delta T Is Calculated

The basic formula is:

Delta T = outlet temperature − inlet temperature

Depending on the system, the measurement may involve air, water, or another coolant. The exact measurement points should always be specified.

Delta T in Liquid Cooling

In liquid cooling, Delta T shows how much the coolant heats up while passing through the equipment. Together with coolant flow rate and heat capacity, it can be used to estimate the amount of thermal energy transferred by the coolant.

A large Delta T does not automatically mean that the cooling system is performing well or poorly. Flow rate, component temperature, coolant properties, and system design must also be considered.

Delta T in Air Cooling

In air cooling, operators can compare inlet temperature with outlet temperature. The difference shows how much the air has heated while passing through the mining equipment.

Why Delta T Matters

Delta T is useful for cooling system design and diagnostics. Changes in the value can indicate changes in flow rate, equipment thermal load, ambient conditions, or heat exchanger performance.

For meaningful analysis, Delta T should be evaluated together with cooling capacity, cooling-medium flow rate, and actual thermal load.