Chillers run continuously, often around the clock, to keep injection molds, hydraulic systems, and process loops at setpoint regardless of what’s happening outside. But not every hour of that runtime actually requires mechanical refrigeration, yet you’ll still see this reflected in your energy bill. It’s time to stop overpaying for industrial process cooling.
A hybrid cooling system, one that combines a dry cooler with a mechanical chiller in a single automatically controlled unit, is built to reduce energy costs. Instead of running the compressor year-round, the system leans on cold outdoor air whenever it can and only engages the chiller when ambient conditions require it. The result is lower energy spend without compromising process reliability.
What is a Hybrid Cooling System?
A hybrid cooling system pairs two cooling methods, free cooling + mechanical refrigeration, inside one factory-assembled unit.
Facilities that need year-round process cooling have traditionally run these as two separate pieces of equipment: a dry cooler for the cold months and a mechanical chiller for the rest of the year.
Sourcing, installing, and commissioning two systems, and then relying on operators to know when to switch between them, adds cost and risk that a combined unit is designed to remove.
The Problem with Running Two Separate Cooling Systems:
- Wasted compressor runtime: A standalone chiller runs its compressor even during cold months when ambient air alone could meet setpoint.
- Manual switchover risk: Operator-managed transitions between free cooling and mechanical cooling depend on someone catching the right conditions at the right time.
- Higher installation cost: Sourcing and commissioning two separate systems means more equipment, more footprint, and more labor than a single combined unit.
- More points of failure: Two independent systems mean two sets of controls, piping, and maintenance schedules to manage instead of one.
Delta T Systems’ Dry Cooler & Chiller Combo Unit eliminates these issues. This hybrid system is a dry cooler and a variable-speed chiller integrated under a single control system, with proprietary logic that decides which mode to run.
So, instead of sourcing two separate systems and running the risks associated with it, you get one integrated system that reduces energy costs.
How Hybrid Cooling Reduces Energy Costs
Delta T Systems’ Dry Cooler & Chiller Combo removes the guesswork by automatically switching between free cooling and mechanical chilling. A single control interface continuously monitors ambient and process temperatures and decides, in real time, whether the dry cooler coils or the chiller circuit should be doing the work.
“Industrial facilities spend a significant portion of their energy budget on process cooling. We designed this product specifically to reduce that cost — not by asking operators to manage two systems more carefully, but by building the intelligence to do it automatically into the unit itself.” – Jochen Naujokat, President of Delta T Systems, Delta T Systems Introduces Dry Cooler/Chiller Combo with Automatic Mode-Switching Controls
When outdoor conditions are favorable, the unit runs in dry cooler mode, rejecting process heat directly to the atmosphere without engaging the compressor at all. When ambient conditions can’t keep up with the load, control shifts to the chiller circuit, and that transition happens without interrupting the process or requiring operator input.
Additionally, the variable-speed compressor modulates between 10% and 100% of rated capacity instead of cycling fully on and off, which alone typically cuts energy consumption 30% to 50% compared to a fixed-speed chiller.
Where Hybrid Cooling Makes the Most Sense
Hybrid cooling is built for facilities that need reliable, year-round process cooling outdoors and want to stop paying for compressor runtime they don’t need.
Common applications include:
- Plastics processing
- Machine tool cooling
- Hydraulic systems
- Chemical process cooling
- Industrial laser applications
These are also the same applications where adaptive thermal management tends to pay off most. Matching output to actual demand (rather than cycling equipment fully on or off) turns into real, measurable savings.
Is a Hybrid Cooling System Right for You?
If you’re currently maintaining a separate dry cooler and chiller side by side, a combined hybrid system is worth evaluating. The right fit depends on cooling load, ambient conditions at your site, and how much of the year favorable free-cooling temperatures are actually available.
Delta T Systems’ Dry Cooler & Chiller Combo Units are factory-assembled and function-tested before shipment, built for outdoor, year-round industrial duty, in both new installations and replacements of aging systems.
Ready to see if a Combo Unit could lower your facility’s energy costs? Contact Delta T Systems with any questions, or request a quote today.