Crawley Library

 

NON-DOMESTIC IN-USE BUILDING PERFORMANCE EVALUATION
Closing the performance gap of an award winning exemplar of sustainable public building design through a TSB-funded Building Performance Evaluation (BPE) study.

Aims

The overall project aim is to optimise the energy performance of the building by reducing the gap between the designed and actual performance. The study will:

  • 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.

Methodology

  • A detailed assessment of annual energy consumption and generation will be undertaken using CIBSE TM22 procedures. Actual energy performance will be compared to benchmarks and other buildings.
  • Sub-metering arrangements will be calibrated, and energy demand profiles will be analysed using BMS data.
  • Long-term monitoring will be 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 will be undertaken in different seasons, using thermography, true power meters and illuminance meters. Walkthrough surveys will identify any wastage of energy.
  • Feedback from staff and visitors using BUS questionnaires will ascertain whether needs are met in terms of performance, usability of controls for ventilation and lighting. Structured interviews with management will investigate reliability, maintenance and maintainability.

Findings

The study of Crawley Library provides insights into the issues that emerge and lessons to be learned in relation to design, commissioning, handover and management of a low carbon public building.

Initial findings of the study reveal insufficient handover training and documentation, frequent change in FM staff, unintended space usage and usability issues of controls and windows. Constant monitoring and feedback is crucial for fine-tuning the building’s operation and achievement of its environmental and service delivery targets.

It is crucial that this approach is absorbed and carried over after the end of the study to ensure future fine tuning and trouble shooting.

PROJECT TEAM

DISSEMINATION

Research Briefing

  • TSB Dissemination summary Dated: June 2012
  • BMS Training session Dated: 22 November 2012

CONTACT DETAILS

Low Carbon Building Group

Oxford Brookes University
Headington Campus
Gipsy Lane
Oxford, OX3 0BP