Can You Use Evacuated Tube Collectors for Pool Heating?

Evacuated Tube Collector Suitability

Evacuated tube collectors are well-suited for pool heating due to their high temperature capabilities, with some models reaching up to 240°F (115°C). This makes them ideal for heating large volumes of water, such as a swimming pool. However, they can be more expensive than other types of solar collectors.

Installation and Design Considerations

When installing evacuated tube collectors for pool heating, it’s essential to ensure that the system is designed to handle the high temperatures and pressures involved. A typical installation would consist of a series of evacuated tubes connected to a heat exchanger or a buffer tank, which circulates the heated water through the pool. The collector array should be sized to meet the pool’s heating requirements, with a minimum of 10-15 square meters of collector area for every 10,000 liters of pool water.

Real-World Example

A 20,000-liter residential pool in a sunny region can be heated using an evacuated tube collector system. For example, a 30-meter square collector array with 120 evacuated tubes, each 1.8 meters long, can provide up to 20 kWh of heat energy per day, depending on the local climate and system efficiency. This can reduce the pool’s heating costs by up to 70% and provide a comfortable water temperature of 28°C (82°F) on a warm day.