Why evacuated tube solar collectors have become a more popular water heater option

Solar thermal technology for water heating applications is a great concept backed by more than 5 decades of practical applications around the world, and is no novelty. Recent growth and developments in this dependable, money-saving technology includes the introduction of various collection processes such as the absorber coatings and the collector design that are in use nowadays.

The evacuated tube solar collector is a recent advancement as compared to the more common and conventional flat plate collector. They are increasingly becoming more trendy and sought after by homeowners in Australia, thanks to a reduction in its overhead cost, high degree of performance and extended dependability in commercial applications as well as in colder climate conditions. In addition, there is its compelling design that is appealing.

The evacuated tube solar hot water systems are available in various variants. Leading manufacturers offer Evacuated Heat Pipe Tube (EHPT) type of systems. The design of evacuated tube solar hot water systems offers great benefits compared to the direct flow setup, easier installation and comparatively lower maintenance and overhead operative cost. This is what makes it particularly attractive to both businesses and individuals.

An evacuated tube solar collector provides a decent value proposition because of its impressive cost-to-performance index as well as efficiency. Therefore, they are becoming more popular for a variety of applications. This includes both commercial as well as residential setups across Australia. Here are some of the main reasons behind their phenomenal success:

  • Evacuated tube solar collectors consist of no water and therefore they can withstand extremely cold conditions
  • The rounded shape of these evacuated tubes facilitate thermal absorption from a range of sun placements, and so works effectively for a longer portion of the day
  • Tubes allow higher heat retention and, therefore, the high amount of heat taken in during daytime can be stored for a number of overcast days and even through the nights 
  • Tubes can independently fit in the header pipe and allow for replacement or the ability to be removed independently without forcing the entire system to decommission
  • Tubes offer aerodynamic drag as the air can freely run around the tubes, thereby cutting down significant air-drag in locations with heavier wind.
  • Such systems work exceedingly well, even on overcast or cloudy days
  • Ideal for applications involving high temperatures such as steam production and water boiling
  • The header pipe has a larger bore and therefore ensures dependable performance in water that has high amounts of calcium hardness

Evacuated hot water heater systems are widely used for various applications in commercial as well as residential heating systems. Ground-mounted residential heating units can be purchased with or without evacuated tube collectors, along with various custom features such as electric or gas boost, custom tank size, etc.

How it works?

A solar hot water heating unit makes use of the solar energy trapped from the sun to heat water. The main components of a solar water-heating unit include collectors used to absorb thermal energy from the sun, an electric or gas booster and a water storage tank.

The storage tank can be positioned on your rooftop right over the heat collectors or on the ground, such as that used in a traditional hot water system. Solar collectors can be placed on the roof, facing as close as feasible to the north direction.

Most evacuated heat collectors come with 10 years of warranty. The unit is extremely durable and good enough to run at peak performance for years without actually requiring part replacement or much maintenance costs.