The main difference between a chiller and a heat pump lies in their purpose and function:
Feature | Chiller | Heat Pump |
Primary Function | Removes heat to cool water or air | Can cool or heat by reversing the cycle |
Operation Cycle | Always moves heat out | Can reverse cycle (cooling & heating) |
Output | Chilled water (typically 4–10°C) | Chilled water or hot water/air |
Heating? | No (cooling only) | Yes (acts like a heater in reverse mode) |
Applications | Industrial cooling, HVAC (cooling only) | HVAC (cooling and heating) |
Energy Recovery | No heat recovery by default | Can recover waste heat for heating |
Components | Evaporator, compressor, condenser, expansion valve | Same components + reversing valve (for switching modes) |
A chiller is a system that removes heat from a process or space and transfers it elsewhere, typically using vapor-compression refrigeration. It produces chilled water (or coolant) for air conditioning or industrial cooling.
Air-cooled chillers: reject heat to the air
Water-cooled chillers: reject heat via a cooling tower
Used in: large buildings, industrial cooling, food processing, plastic molding.
A heat pump is a system that can both cool and heat by reversing the refrigeration cycle. In cooling mode, it works like a chiller or AC. In heating mode, it extracts heat from outside (even cold air) and transfers it indoors.
Air-source heat pumps: absorb/release heat from air
Water-source or geothermal: use ground or water sources
Used in: residential & commercial HVAC, underfloor heating, and sustainable energy systems.
Jul. 21, 2025
The manufacturing industry continually seeks innovations that enhance efficiency, and High-Capaci...Jul. 21, 2025
This comprehensive guide is for facility managers and mechanical engineers seeking effective soluti...● Choose a chiller when:
1. Cooling-only requirement
Example: Server rooms, process cooling in factories, large cold storage.
2. High cooling load with no need for heating
Air-cooled chillers: Easier installation, better for small-medium applications.
Water-cooled chillers: More efficient for large buildings but needs cooling towers.
3. Industrial use
Precision temperature control for equipment or chemical processes.
4. Climate is hot and no space heating is needed.
● Choose a heat pump when:
1. Both heating and cooling are needed
Great for homes, office buildings, hospitals, hotels, etc.
Reduces the need for separate systems.
2. Mild to moderate climates
Air-source heat pumps work best above -5°C (23°F).
In colder climates, consider ground-source (geothermal) or hybrid systems.
3. Energy efficiency is a priority
Heat pumps can be up to 300–400% efficient (COP > 3).
4. Sustainability goals
Heat pumps use electricity and can integrate with renewable energy.
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