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How Does a Thermodynamic Water Heater Work?

Published in Water Heating 2 mins read

A thermodynamic water heater heats water by extracting heat from the surrounding air using a heat pump.

Here's a breakdown of how it works:

  • Heat Absorption: The system utilizes a refrigerant that circulates through an external evaporator panel. This panel absorbs heat energy from the ambient air, even at low temperatures. The "thermodynamic" part emphasizes the extraction of energy already present in the environment.

  • Refrigerant Compression: The refrigerant, now warmed by the absorbed heat, is compressed. This compression process further increases the refrigerant's temperature.

  • Heat Transfer to Water: The hot refrigerant passes through a heat exchanger located inside the water tank. This heat exchanger transfers the heat from the refrigerant to the water, raising the water's temperature.

  • Refrigerant Expansion: After releasing its heat, the refrigerant expands, causing it to cool down. This cooled refrigerant then cycles back to the evaporator panel to begin the process again.

  • Water Storage: The heated water is stored in an insulated tank, ready for use.

In essence, a thermodynamic water heater functions much like a reverse refrigerator. Instead of cooling an interior space, it extracts heat from the air and uses it to heat water. This makes it a more energy-efficient alternative to traditional electric or gas water heaters, because it is not solely relying on electric resistance or burning fossil fuels to generate heat; it's moving heat that already exists.

Here's a simplified table summarizing the process:

Step Component Action
1. Absorption Evaporator Panel Absorbs heat from the air.
2. Compression Compressor Increases refrigerant temperature.
3. Heat Transfer Heat Exchanger Transfers heat to the water in the tank.
4. Expansion Expansion Valve Cools down the refrigerant.

The thermodynamic water heater is an effective way to heat water by leveraging a renewable energy source: the air. It provides a sustainable and cost-effective water heating solution.

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