SAV welcomes more rigorous testing for HIUs

Published:  02 March, 2017

SAV Systems, HIUs, heat interface unit, district heating, space heating, heat networks

SAV Systems has welcomed the announcement of a new regime for testing heat interface units (HIUs), noting its potential to significantly improve the performance of heat networks.

Sales director Jan Hansen observes, ‘Under-performance of heat networks is often down to poorly designed HIUs that are unable to cope with variations in the system and fail to maintain the temperature differentials required for optimum efficiency, This new testing regime is more demanding than its predecessor, and the adoption of the new test standard by the Building Engineering Services Association will ensure wider compliance.’

SAV has supported HIU testing since the introduction of an earlier regime developed by Fairheat with support from the then Department of Energy & Climate Change (DECC). The first round of tests showed that SAV’s Danfoss FlatStation HIUs provided the lowest VWART (volume-weighted average return temperatures) values of all HIUs tested.

SAV will now be submitting FlatStations for testing under the new regime. ‘We are very focused on the performance of the whole system at both full and part load conditions, and FlatStations are optimised to deal with varying system differential pressures and high performance at low, high and dynamic DHW tapping conditions,’ Jan Hansen continued.

‘We are therefore confident that they will exceed the requirements of the new tests. We are also particularly pleased the new regime will conduct tests based on both 70°C and 60°C primary supply temperatures as Danfoss FlatStations are optimised to perform efficiently with the low-temperature heat networks of the future.

‘Indeed, we would like to see even more rigorous HIU testing, underpinned by penalties for heat networks that don’t perform adequately — such as failing to maintain a ∆T of 30 K. This will encourage a more holistic approach that looks beyond the HIUs to other factors such as correct installation and proper balancing of heat emitters,’ he noted.

For more information on this story, click here: March 2017, 100

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.
October 2018: DIGITAL EDITION

ARCHIVE OF DIGITAL EDITIONS

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

BESA conference 2018

Show

Jobs

  • Senior Building Services Engineer

      Invitations are invited from experienced Building Services Engineers to assist in the development of a new division within an established professional practice. The projects will be predominantly with Defence-related and Government establishments but w......

  • Building Energy Management Systems (BEMS) Engineer

      Consistently rated amongst the world's best universities, Imperial College London is a science-based institution with a reputation for excellence in teaching and research. Imperial has one of the largest and most diverse university estate portfolios in......

  • Engineering Technical Assistant

      Consistently rated amongst the world's best universities, Imperial College London is a science-based institution with a reputation for excellence in teaching and research. Imperial has one of the largest and most diverse university estate portfolios in......

more jobs »

Poll

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



Calendar