How Does an Air Source Heat Pump Work?

09 Sep.,2024

 

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How Does an Air Source Heat Pump Work?

An air source heat pump (ASHP) works by transferring heat from the outside air into your home for heating, or vice versa for cooling. Here’s a breakdown of its functioning:

1. What is an Air Source Heat Pump?

An air source heat pump is a device that uses electricity to transfer heat from one place to another. It can operate effectively in various climates, extracting heat from the outside air even in cold conditions.

2. How Does It Extract Heat?

The process begins with the heat pump’s refrigerant, a special fluid that easily absorbs heat. The refrigerant circulates through a closed loop inside the system, providing a continuous flow of energy. Here’s how the extraction works:

Initially, the outdoor unit comprises a fan and coils filled with refrigerant. The fan draws in outside air, and as the air passes over the coils, the refrigerant absorbs heat from this air, even if it feels cold to us.

3. What Happens Next?

Once the refrigerant absorbs heat, it transforms from a liquid to a gas. This gas is then compressed by a compressor inside the unit, which increases the temperature significantly. The high-pressure gas then moves to the indoor coils.

4. How is Heat Distributed Indoors?

At this stage, the hot gas enters the indoor unit, where it releases its heat into the indoor air through the coils. As the gas loses heat, it converts back to a liquid state and returns to the outdoor unit to begin the process again. This cycle continues to provide warm air into your home.

5. How Does It Work for Cooling?

In summer, the operation reverses. Instead of pulling heat from the outside air to warm your home, the heat pump absorbs heat from indoors and releases it outside, thereby cooling your living space.

6. What Are the Benefits of an Air Source Heat Pump?

Air source heat pumps are energy-efficient, as they move heat rather than generate it by burning fossil fuels. They can significantly lower energy bills and contribute to lower carbon emissions, making them a more sustainable choice for home heating and cooling.

7. What Should You Consider before Installation?

While air source heat pumps are advantageous, their performance can be affected by extreme temperatures. It's advisable to consider your local climate and consult with a professional for proper sizing and installation. Additionally, they may require backup heating systems in very cold weather.

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