Looking to reduce gas bills for its heated swimming pool, independent girls’ school Perth College decided to install an evacuated tube (EVT) solar pool heating system.
EVT systems can produce twice the heat per unit of a traditional flat plate panel system and is efficient enough to keep the pool well heated in cooler months.
The 50-metre, eight-lane swimming pool gets quite a bit of use: not only is it used by the school, it is also home to the Perth City Swimming Club which facilitates swim teaching, coaching, learn-to-swim sessions and squad training. It is also home to the Perth Swim Academy, a centre of excellence for education, instruction and development of swimming sports.
Perth College engaged Supreme Heating WA to install a 72-panel EVT system. The company specialises in energy-efficient heating solutions for homes and pools and was able to turn the project around in five weeks.
The system is designed to produce water at very high temperatures, so Supreme Heating needed a copper joining solution that could cope with the temperatures.
“We needed a solution that could be guaranteed” said Craig Doncon, principal of Supreme Heating.
“We looked at both the Viega Propress system and a competing system, and were given assurances by Viega that their fittings won’t fail up to 200°C. With the other system, we were frustrated that it wouldn’t handle high temperatures beyond 25mm.
Viega’s offering is capable of handling peak temperatures of 200°C for the duration of stagnation events, according to Rod Luker, Viega’s national sales manager.
For the Perth College project, Supreme Heating used a range of fittings from DN20 to DN65mm.
“Viega had a wide range of sizes to support the EVT system design”, said Doncon.
Another factor for choosing the Viega fittings was the simplicity of use, Doncon says.
“The tooling is easy to use, lightweight and functional for repetitious work. Speed of work was also important. For example, using the Propress system saved me around two weeks work – and that included pressure testing.”
As published by Pool and Spa Review (page 44).