BSRIA Guide
2 total works
29/11
Pre-commission Cleaning of Pipework Systems
by Reginald Brown and C. J. Parsloe
Published March 2001
Thorough pre-commission cleaning of pipework has become even more important with the adoption of energy efficient controls strategies that may result in low flow rates, particularly in terminal units with very small orifices in control valves. This guide provides the latest thinking and good practice cleaning techniques. In particular, it aims to clarify the roles and responsibilities of the parties, improve the exchange of information between them and provide consistency between service offerings of the pre-commission cleaning contractors. Pre-commission cleaning is achieved through a process of flushing and chemical cleaning (where required) followed by the addition of biocides and inhibitors. Systems designed and cleaned in accordance with BSRIA's guidance are far less likely to experience operating problems.
12/11
The Guide is a result of a BSRIA's research project carried out in collaboration with BRE and the industry partners including Danfoss, Frese, Belimo, SAV UK, Andrew Reid & Partners, Crane Fluid, Herz Valves and Grundfos. It recognises that the potential for pump energy savings is substantial. Europump (a pan European association of pump manufacturers) estimate that systems could be 30 to 50% more energy efficient by careful consideration of components, design and installation. Indeed our research has shown that a potential energy saving of 80% is achievable between the worst operating constant flow systems and the best designed variable flow systems. Furthermore, in heating and cooling applications a lack of regard for pump energy may lead to missed energy savings elsewhere. For example, excess flows tend to lower system temperature differentials, thereby reducing the effectiveness of some low energy (or low carbon) heating and cooling sources. Essentially this guide provides recommendations for building services designers on the design of energy efficient pumping systems.
However it will be invaluable to a broader group including manufacturers, contractors and end-users who will benefit from being able to design, install, select and manage more efficient systems.
However it will be invaluable to a broader group including manufacturers, contractors and end-users who will benefit from being able to design, install, select and manage more efficient systems.