Solar thermal system beats stagnation problems

Published:  01 December, 2010

AO Smith, solar thermal, renewable energy, DHW, domestic hot water

A.O. Smith solar thermal systems for producing domestic hot water have a patented system to overcome the problem of stagnation in the panels. Mounted directly below the solar collector, the drain-back system avoids stagnation, when the heat-transfer fluid can overheat and start to break down. There is also no need to start the pump to get rid of excess heat when the demand for hot water is low, and no need to build in an oversized storage system to cope with excess heat.

The heat-transfer fluid in the panels is not pressurised. When there is no demand for heat, the pump is switched off and all the heat-transfer fluid drains back into the reservoir beneath the panels.

A complete system comprises solar panels with an SGE or SGS condensing gas-fired water heater and an intelligent control system. All the system elements communicate directly, resulting in up to 40% solar contribution. If the solar input is low, the pump speed can be modulated down to 15% of nominal speed, maximising the solar energy available.

The panels and water heater are supplied as an integrated system, with commissioning carried out by fully trained technical staff.

For more information on this story, click here:  Dec 2010, 108

comments powered by Disqus

Search

Welcome

Welcome to Modern Building Services Online, the web edition of Modern Building Services (MBS) journal and the UK's most popular Building Services engineering site. Modern Building Services covers the entire Building Services Engineering industry. This site contains archived content from the journal, plus web-specific content.

When you go to our digital edition, you can also access the archive of digital editions.
August 2017: DIGITAL EDITION
ARCHIVE OF DIGITAL EDITIONS

Modern Building services has a group
on Linkedin - join us!

Construction Week

Show

Jobs

  • Field Sales Executive

    Successful professional technical salesperson required to sell to consultants and contractors. Unique opportunity to sell ultra-low energy, patented technology, ventilation products from a UK manufacturer. ...

  • Property Surveyor

    Property Surveyor/ Building Service Surveyor needed to work within the Technical Services team for the management of water hygiene/ legionella risk within DCC's property portfolio. We are looking for an experienced and dynamic team member to join our T......

more jobs »

Poll

"Is the Building Services industry lagging behind in the implementation of BIM?"



Calendar