Two-port (variable flow) control strategy
Heat Interface Units (BG 62/2015) was written by Reginald Brown and published by BSRIA in December 2015. It states: ‘In two-port control, a two-port control valve varies the flow of water through the heat emitter in order to vary the heat output. A typical example of a two-port control valve is the thermostatic radiator valve. In order to achieve good control, the pressure differential across the valve should be relatively constant. This is achieved by utilising a variable speed circulation pump with pressure control. If a constant speed pump is used then the pressure differential increases as the valve closes, resulting in poorer control and waste of pump energy. The benefit of two-port control for the heat emitters associated with heat networks is that it minimises the return temperature.’
--BSRIA
[edit] Related articles on Designing Buildings
- A technical guide to district heating (FB 72).
- Big growth in district heating markets - now and on the horizon.
- BSRIA articles.
- BSRIA definitions.
- BSRIA guide to heat interface units.
- Communal heating.
- Direct heat interface unit.
- District energy networks
- Domestic micro-generation.
- Heat interface unit.
- Indirect heat interface unit.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
CIOB reports 57% are using artificial intelligence technologies.
More of England’s ‘hidden heroes’ will be celebrated.
CIAT calls for retrofit to be a priority.
Version 6 is now available, along with guidance for ECA members.
Post-War Homes: mid-century British architecture. Book review.
CIAT reflects on the party conferences.
CIOB announce the winners of the Art of Building photography competition.
National Scheme of Delegation introduced.
The cost of employing people remains a concern.
Code of Practice for Electrical Energy Storage Systems.
ECA calls on members to comment on draft 4th edition.
Bringing together expertise and creating cultural benefits.
CIOB celebrates positive Ofsted report.