Daniel Coakley presented at the recent CIBSE Symposium on “Integration for whole life building performance.” His session looked at the “Development of calibrated operational models of existing buildings for real-time decision support and performance optimisation.” Building simulation tools are commonly used in design for performance appraisal and optimisation. However, numerous studies have found that actual building performance often deviates significantly from simulation predictions.
You can view the presentation here:
There is also an accompanying paper, which proposes a detailed framework to produce calibrated operational models, which can support operational decision-making, and real-time control optimisation.
The approach centres around a three-tier calibration process:
• Tier 1 focuses on Building level (Demand-side) variables (e.g. occupancy, equipment, infiltration).
• Tier 2 focuses on system-level (HVAC) model components (e.g. heating / cooling coil capacities). In this phase, we use detailed building data combined with genetic optimisation techniques to calibrate relevant input parameters. In the case where system performance modelling is not necessary, we use free-form profiles (i.e. measured building data) to supplement these model components. Once system-level noise has been eliminated.
• Tier 3 calibrates the remaining plant-level parameters (e.g. central plant, electricity consumption, etc.).
The approach is supported by two novel developments:
(1) Free-form profiles: These are actual historic trends from existing building controllers, which are used to supplement model components where appropriate;
(2) Genetic Optimisation algorithms are utilised to efficiently navigate the solution space to reduce discrepancies between the model and actual system performance. The proposed calibration approach builds upon prior research efforts to standardise the calibration process using evidence-based model development, combined with sensitivity and uncertainty analysis.
Click here to read the full paper.
Posted : May 17, 2016 by Suzanne
In a testament to the talent and high level of expertise of our people, Consulting-Specifying Engineer (CSE) magazine, for the 5th time, have selected an IES member of staff to receive a prestigious 40 under 40 award. This year’s winner is Colin Rees, Consultancy Manager at IES. The award is given to 40 non-residential building […]
As the doors to All Energy closed the other week, so did the end of a busy week for IES. Our R&D division presented on five different European funded projects we’re currently involved in: EINSTEIN & Energy in Time: Making real-time operational control of buildings a reality with 3D simulation Catherine Conaghan, Senior Project Manager, […]
Last Week Daniel Coakley of IES spoke on the topic of “Modelling Natural ventilation in the IESVE: Case studies & Research Outlook” at a half day seminar, organised by Cork Institute of Technology (CIT), for researchers, designers, engineers & architects. This CIT Technical Seminar: Ventilative Cooling & Overheating Risk was organised in collaboration with IEA-EBC […]
Next week All Energy opens at the SECC for another year and we’re gearing up for all that it will bring. As we’re headquartered in Glasgow it’s great having such a forward looking event going on in our home town. And boy is Glasgow a great host city – not only does it have flourishing […]
Posted : April 22, 2016 by Karen Duffin
We are delighted to announce that last night IES received a coveted H&V News Award in the ‘BIM Initiative of the Year’ category. The award was in recognition of our ongoing BIM4Analysis Campaign for best example of promoting, educating or implementing Building Information Modelling within the industry. The results of the H&V News Awards were […]
Posted : April 21, 2016 by Colin Rees
The recent COP21 summit in Paris again threw into focus the challenge of climate change, with urban development being confronted to reduce their energy usage. Simultaneously there is a growing concern on how overheating is severely impacting building performance and occupant comfort. With rising global temperatures being experienced now and significant increases expected over the […]
Posted : April 15, 2016 by Naghman Khan
Do you know what BIG DATA is? You must have heard of it? The exponential growth in the volume, velocity and variety of data generated each second and the corresponding increase in processing power, algorithms and databases which have developed side by side. These databases are used to collate, store, analyse and leverage insights from […]
When it comes to getting the most out of your data, collaboration is the key. Nowadays there is masses of data available at every stage of the building lifecycle. And nowhere more so than at operation. The increasing volume, variety & velocity of data available presents its own organisational and analysis challenges. As does getting […]