Public health Drainage
project by the HWU/Studor partnership has resulted in a marketable product and methodology soon to be available to facilities engineers and building operators. The methodology is both non-invasive (as the equipment is mounted in the upper dry stack); non-destructive (as a 10 Hz signal of 30mm water gauge is insufficient to generate more than a 1mm deflection in a fully charged trap seal); and remote, as the operation may be controlled from afar (the Glasgow tests were run by computer link to HWU in Edinburgh to prove this capability). It is essential that academia works closely with its industrial partners in the broadest sense of that term. HWU and Studor have demonstrated the benefits of such partnerships by the development of new product and new design technologies and the introduction of a public health-enhancing remote sensing system to assess trap seal integrity. HWU has also worked with major industry players,
such as CaromaDorf in Australia (on low-flush WC design and drainline carry) and Hepworth (now Wavin) on the waterless sheath trap development. It is hoped that these projects will encourage further industry-academia interactions, as both parties have much to learn and much to benefit from each other. l Further details of the partnership outcomes and HWU’s other research can be found in Transient airflow in building drainage networks by John Swaffield, published by Spon, April 2010.
Figure 3: Developed test equipment used to provide a remote and non- invasive transient-based technique to identify empty water trap seals
Data collection & signal generator
Directional f bw valve (in test mode)
Connection branch
Pressure transducer
Amplifier
Sinusoidal exciter
John Swaffield is emeritus professor at Heriot Watt University. Steve White is technical manager at Studor, a manufacturer of air admittance valves.
for LZC solutions
GEOflo 21.3kW Ground Source Heat Pump
Provides a “best in class” coefficient of performance of 4.7 when used with a low temperature heat load such as underfloor heating.
A-Cubed Gas Absorption Heat Pump
Can deliver efficiencies of over 140% offering a significant reduction in carbon emissions, ozone depletion and global warming potential through use of ammonia as the refrigerant.
Sirius SAT Heat Boxes with Wireless Data Transmission
An integrated solution for delivering and recording the heat energy consumed by an individual dwelling in a block of apartments served by central boiler plant.
DACHS Mini-CHP Combined Heat & Power
Europe’s biggest selling CHP product offers energy cost savings together with significant environmental benefits in the sub-10kW output range.
www.baxi-senertec.co.uk
www.pottertoncommercial.co.uk
www.andrewswaterheaters.co.uk
John Swaffield
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88