Commercial heating
play. As a large user of energy in a building, heating is a common starting point for energy saving measures. And with many older non-domestic buildings relying on commercial boiler plant for heating, replacing old or inefficient models with condensing boilers could be just the cost-effective solution required for compliance. Why? Even when well maintained, old non-
condensing boilers will achieve just 70% efficiency at best. Condensing boilers deliver the highest efficiencies of all boiler technologies of up to 97% gross. As a result, they offer huge potential for energy savings, as independent studies confirm. Reports by the Green Construction Board and the Sweett Group for the Investment Property Forum (IPF) both list condensing boilers and controls as low-cost effective measures to lift the EPC band of lower rated properties.
Maximise performance
However, good design is central to achieving the best efficiencies from condensing boilers – especially on older systems. In existing buildings where the radiator circuits have been designed for 82°C flow and 71°C return temperatures, condensing boilers will struggle to fully condense. Lowering the flow and return temperatures to 70/50°C or even 60/40°C will resolve this issue. This is because condensing boilers operate most effectively at lower return temperatures of up to 54°C (dew point) where they can recover both the
sensible and latent heat from the flue gases. Adding controls is equally important to maximise boiler performance. Time and temperature controls help boilers operate more efficiently, while weather compensation controls enable them to adapt to the fluctuating demand according to the outside temperature. On a multi-boiler cascade system, adding a sequential control ensures that the boilers operate effectively and reliably, rotating the lead boiler and lengthening the serviceable life of the boilers. Fully integrating the heating controls with the Building Management System is essential to maintain optimum boiler performance. Finally, it’s important to take sufficient time to
carry out hydraulic, combustion and controls commissioning as this is central to achieving the required high efficiency operation.
Better building environments
For landlords, the countdown to MEES has begun. On a positive note, legislation aside, improving a building’s energy performance will also bring landlords financial benefits as occupants increasingly favour properties with higher EPC ratings. At Remeha, we look forward to supporting
consultants, contractors and landlords with our advanced heating technology, our in-depth product knowledge and our renowned technical expertise. Together we can achieve the most effective and cost-effective solutions to help make our buildings better, more comfortable places to be.
A total of nine Remeha Gas 310/610 Eco Pro boilers operate in the energy centre at Fitzroy Place to sup- ply energy-efficient heating and hot water to the eight-storey office building at One Fitzroy Place, the second office building at Two Fitzroy Place, and the residential areas of the complex
www.heatingandventilating.net
November 2017
27
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
