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 and news
Government responds to the final Grenfell Inquiry report
A with a brief summary with reactions to their response.
A brief description and background to this new February law.
Everything you need to know about building conservation and the historic environment.
NFCC publishes Industry White Paper on Remediation
Calling for a coordinated approach and cross-departmental Construction Skills Strategy to manage workforce development.
'who blames whom and for what, and there are three reasons for doing that: legal , cultural and moral"
How the Home Energy Model will be different from SAP
Comparing different building energy models.
Mapping approaches for standardisation.
UK Construction contract spending up at the start of 2025
New construction orders increase by 69 percent on December.
Preparing for the future: how specifiers can lead the way
As the construction industry prepares for the updated home and building efficiency standards.
Embodied Carbon in the Built Environment
A practical guide for built environment professionals.
Updating the minimum energy efficiency standards
Background and key points to the current consultation.
Heritage building skills and live-site training.
Shortage of high-quality data threatening the AI boom
And other fundamental issues highlighted by the Open Data Institute.
Data centres top the list of growth opportunities
In robust, yet heterogenous world BACS market.
Increased funding for BSR announced
Within plans for next generation of new towns.