- A detailed assessment of annual energy consumption and generation was undertaken using CIBSE TM22 procedures. Actual energy performance was compared to benchmarks and other buildings.
- Sub-metering arrangements were be calibrated, and energy demand profiles analysed using BMS data.
- Long-term monitoring was undertaken of temperatures, humidity and CO2 levels to investigate the effect of ‘thermal mass’ in moderating temperatures.
- To determine technical performance, spot checks and measurements took place in different seasons, using thermography, true power meters and luminance meters. Walkthrough surveys identified any wastage of energy.
- Feedback from staff and visitors using BUS questionnaires ascertained whether needs were met in terms of performance, usability of controls for ventilation and lighting. Structured interviews with management investigated reliability, maintenance and maintainability.
Crawley Library Building
Principal Investigator(s): Professor Rajat Gupta
Project start: September 2011
Project finish: September 2013
Funded by: Innovate UK
Category: Non-domestic in-use building performance evaluation.
Objective: Closing the performance gap of an award winning exemplar of sustainable public building design through a TSB-funded Building Performance Evaluation (BPE) study.
The overall project aim was to optimise the energy performance of the building by reducing the gap between the designed and actual performance. The study aims were:
- Improve building performance by providing feedback on how a multi-stakeholder public client manages the building to support each end user group's very distinct needs.
- Provide key lessons for future public building design, specification and performance.
- Increase understanding of the relationship between intended performance and actual performance in use.
- Identify the role of occupants in minimising energy use, from full time staff, social services outreach workers, to members of the public using council services.
Professor Rajat Gupta
Professor of Sustainable Architecture and Climate Change, Director of OISD and LCB Group