Main Library Refurbishment University of Edinburgh

1. Presented by: • Emily Forde • Director of Interior Architecture • Lewis and Hickey • Neil Scanlon • Senior Mechanical Engineer • RSP Consulting Engineers LLP Main Library Refurbishment University of Edinburgh

2. UoE Main Library • designed by Sir Basil Spence • opened in 1967 • floor area approx 28,000sqm • now Grade ‘A’ Listed

3. Why Redevelop? • inefficient in energy terms • issues with water ingress • advance in user requirements • trace asbestos discovered

4. Proposals • address energy issues whilst reducing the Library’s impact on the environment • complete fabric repairs • amend the layout to suit the user requirements • complete asbestos removal works • continuity of service required so project to be phased

5. Contents Before and After Improvements CO2 Reduction

6. Before and After Before Central Plant • 2No fans within the sub-basement providing 80m3/s total (mixed). • Fresh air rate of 14m3/s, providing 7l/s per person. • Supply air filtered/ cooled/ humidified within basement ducts. • Supplementary AHUs added within the second floor. • Exhaust fan located within loading bay. • 3No 677 kW air cooled chillers.

7. Before and After General Services Before • Electric under floor heating and electric heater batteries. • Mechanical ventilation and Air Conditioning • Spot cooling FCUs • Generally recessed T12 linear fluorescent fittings with promatic controllers either grouped or locally switched.

8. Before and After Typical Floor Before

9. Before and After Vent Schematic Before

10. Before and After Contributions to CO2 Output Before • Poor Building Envelope Thermal Performance (1969) • Early double glazing (3.00 W/m²/°C). • Air permeability. • Roof Insulation.

11. Before and After Contributions to CO2 Output Before • Poor Plant Efficiency • Fan SFP (Poor). • Plant reached end of its economical life. • Electric Heating.

12. Before and After EPC Before • Current Rating of E+ • Poor • 169 kWh/m2 • Electric Heating

13. Before and After How Did We Improve? After • Building Connected into District Heating and Cooling Systems • District Heating: CHP + Boilers. • Provide a constant temp circuit to DHW Plant & AHUs. • Provides a weather compensated circuit to perimeter heating (80/60°C F&R). • District Cooling: Absorption Chillers + Dry Air Coolers. • Provide compensated chilled water to AHU Plant. • Provides chilled water to active chilled beams (14/17°C).

14. Before and After Central Plant After • 2No general supply AHUs within 6th floor plant rooms providing 40m3/s total fresh air (8 l/s person). • 1No extract AHU within 6th floor plant room. • Supply AHUs including heat recovery coils and adiabatic humidifiers.

15. Before and After Vent Schematic After

16. Before and After General Services After • Ventilation • Active chilled beams • Displacement to Cafe, Main Hall and Exhibition Room. • General Floor • Active chilled beams with chilled water (14/17°c). • Perimeter heating (80/60°c). • 2 port control on heating and chilled water. • Differential pressure control valves. Assists phasing. • Luminaires: • Generally ‘Intelligent’ recessed modular fittings using T8 high frequency dimmable control gear with in-built daylight and presence detection.

17. Before and After Typical Floor After

18. Before and After Co-ordination of ceiling void Before

19. Before and After Contributions to CO2 Reduction After • Improvement to Building Envelope Thermal Performance • New double glazing (1.74 w/m²/°C). • Air permeability. • Roof Insulated.

20. Before and After Contributions to CO2 Reduction After • Plant/Systems • District Heating and Cooling. • Improved Plant Efficiency. • AHU SFP: 3.5w/l/s. • Chilled beam. • Invertors on all major plant. • Daylight and presence detection lighting control

21. Before and After EPC After • Improved rating of B+ • 88 kWh/m2 • Reduction of 48%

22. Before and After BREEAM After • RSP carrying out BREEAM Assessment. • Working towards Very Good.

23. Thank you for listening Any questions?