Which component is described as a controllable damper in the cooling system?

Which component is described as a controllable damper in the cooling system?

• A. Economizer
• B. Evaporator
• C. Condenser
• D. Receiver

Answer: (A)

In cooling systems, the economizer is the component that includes a controllable damper. The damper modulates to mix outdoor air with return air, allowing the system to use cooler outside air to meet part of the cooling load and save energy. When outdoor conditions are favorable, the damper opens more to bring in outdoor air; when they’re not, it closes to minimize bringing in hot or humid air. The other items—evaporator, condenser, and receiver—are refrigerant heat exchangers or storage, not dampers, so they aren’t described as controllable dampers.

In cooling systems, the economizer is the component that includes a controllable damper. The damper modulates to mix outdoor air with return air, allowing the system to use cooler outside air to meet part of the cooling load and save energy. When outdoor conditions are favorable, the damper opens more to bring in outdoor air; when they’re not, it closes to minimize bringing in hot or humid air. The other items—evaporator, condenser, and receiver—are refrigerant heat exchangers or storage, not dampers, so they aren’t described as controllable dampers.