Effects of circadian lighting on health and wellbeing
Project type: Research jointly funded by CIBSE and the BRE Trust
Coordinated by: Dr Paul Littlefair, BRE
This research project jointly funded by CIBSE and BRE Trust, investigated the impacts of cool coloured lighting on occupant comfort. It aimed to find optimal control strategies for circadian lighting to maximise health and wellbeing benefits.
The output of the project’s first stage is a report which provides a review of the existing literature on circadian lighting and how this affects human health and wellbeing. It incorporates findings from a workshop on circadian lighting, held at BRE on 29 September 2016 as part of the project. The workshop was attended by leading professionals from academia, manufacturers, lighting designers and public health institutions. The report is published on the Knowledge Portal at: https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q0O00000CF7o9QAD.
The project’s final report has been published as part of the CIBSE Research Insights series: https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q3Y00000HZfg0QAD.
Sizing of hot and cold water systems
Project type: Two-year Knowledge Transfer Partnership with CIBSE and Heriot Watt University
Research Associate: Achala Wickramasinghe
Academic Supervisor: Prof Lynne Jack
Date: October 2017 - February 2020
This was the CIBSE and Heriot Watt University Knowledge Transfer Partnership, funded by Innovate UK, to develop a stochastic model for the assessment of design flow for domestic hot and cold water services for medium-large scale domestic residential installations. This two year project aimed to update current CIBSE guidance on the sizing of hot and cold water systems in order to maximise system efficiency. The project followed on from the phase 1 collaboration with Chartered Institute of Plumbing and Heating Engineering (CIPHE) and the Loading Unit Normalisation Assessment (LUNA) group to review the use of loading units as a method for sizing domestic hot and cold water systems.
The Research Report from Phase 1 is published on the Knowledge Portal:
The KTP Associate, Achala Wickramasinghe, presented her work at the CIBSE B2P Live 2018 and also published an article summarising her research in the March 2019 CIBSE Journal: https://www.cibsejournal.com/technical/stemming-the-flow/.
Achala also collected measured data to validate the model she developed.
Weather data for daylight modelling
Project type: Two-year post doctorate research in association with Loughborough University
Research Associate: Dr Eleonora Brembilla
Academic Supervisor: Prof John Mardaljevic
Date: September 2017 - September 2019
Maximising potential for natural daylight is essential for both indoor comfort and wellbeing but also to reduce energy demand for artificial lighting. Realistic assessment of the potential daylight availability is important in order to maximize its use and energy efficiency potential, whilst avoiding undue excesses which might cause visual discomfort or high cooling loads. Current software tools use weather data that are largely founded on temperature based criteria rather than visible radiation (e.g. illuminance) and so they are not appropriate for the assessment and modelling of daylight potential. This CIBSE sponsored postdoctoral two-year project aimed to bridge that gap and to provide the industry with improved resources to apply in their daylight design practices.
The postdoc researcher, Eleonora Brembilla, presented her work at the CIBSE Technical Symposium 2019 and her paper provides a summary of her analysis: https://www.cibse.org/knowledge/knowledge-items/detail?id=a0q0O00000GQnYa. Eleonora also submitted a paper for the Building Services Research and Technology (BSER&T) Journal – Special Issue on Health and Wellbeing published in January 2020.
Delivering Collaborative Design
Project type: Industry led research
Coordinated by: Andrew Write, Andrew Write Associates
The project developed a series of tools based on the analysis of various exemplar case study buildings and established the key factors that contribute to the successful completion of those projects. The project was also supported by CIC, RIBA and other professional bodies and industry companies and aimed to utilise those bodies to disseminate its outputs and promote the new approach.
Designing for extreme weather events
Project type: Three-year doctorate research in association with University of West London
Research Associate: Athanasios Lykartsis
Academic Supervisor: Dr Ali Bahadori-Jahromi
Date: June 2015 - September 2018
Athanasios Lykartsis, a CIBSE sponsored PhD student was researching design for extreme weather events in a three-year project at the University of West London (UWL), investigating the impact of observed extreme weather events and suggesting solutions for increasing the resilience of buildings in order to remain operational. The project also examined the resilience of buildings under future extreme events, utilising the UKCP09 information. The project had clear links with the work of the CIBSE Special Interest Group on Resilient Cities and the research benefitted from the Group’s expertise in this area.
The CIBSE sponsored Research Associate, Athanasios Lykartsis, successfully completed his PhD viva.
Human response to LED based lighting solutions
Project type: Research commissioned by CIBSE
Coordinated by: Public Health England
Date: April 2015 - April 2016
The aim of this project was to investigate certain aspects of LED lighting, to assess how they impact on humans and give quantitative indicators for acceptable measures. It is considering the possibility of fundamental research balanced against reporting on existing work being carried out within CIE and other organisations. It is designed to yield unbiased results that will provide guidance and confidence to lighting designers, specifiers and the general public on the use of LED lighting solutions. The project is intended to address five key areas:
- Measurement of colour of LEDs currently available on the market.
- Assessment of the role of derived colour metrics.
- Measurement of flicker of LEDs currently available on the market.
- Assessment of the impact of flicker on users.
- Survey existing research into the effects of low LED light levels on circadian rhythms.
The final report can be downloaded here.
The urban climate: an integrated approach to building performance and urban design
Project type: Engineering Doctorate in association with UCL
Research Associate: Dane Virk
Academic Supervisors: Prof Mike Davies and Dr Anna Mavrogianni, UCL
Date: September 2011 - September 2015
The project aimed to evaluate how urban climates affect the built environment and in turn, how changes to land use and building design affect the urban environment. Research outputs contributed to new design guidance for CIBSE members. The project has provided considerable input to and support for the development of CIBSE weather data.
Dane contributed to Guide A section 2, revising the section on Urban Heat Islands, and to the Zero Carbon Hub ‘Tackling overheating in homes’ review published in March 2015. He has published two papers in renowned international journals looking at the effect of green and cool roofs in the thermal and energy performance of office buildings. His third paper was published in the BSER&T Special Issue (March 2015) on overheating and indoor air quality. In this later paper he is demonstrating the use of the recently published CIBSE Design Summer Years for London in designing for the Urban Heat Island effect in London. Dane has also completed a guidance document for CIBSE Members (soon to be published as a new TM).
- Virk, G, Mylona, A, Mavrogianni, A, Davies, M, (2015) ‘Using the new CIBSE Design Summer Years to assess overheating in London: effect of the urban heat island on design’, Building Services Engineering Research & Technology, March 2015, vol. 36, 2: pp. 115-128
- Virk, G, Jansz, A, Mavrogianni, A, Mylona, A, Stocker, J.R, Davies, M, (2015) ‘Microclimatic effects of green and cool roofs in London and their impacts on energy use for a typical office building’, Energy and Buildings, 1 February 2015, vol. 88, pp. 214–228
- Virk, G, Jansz, A, Mavrogianni, A, Mylona, A, Stocker, J.R, Davies, M, (2014) ‘The effectiveness of retrofitted green and cool roofs at reducing overheating in a naturally ventilated office in London: Direct and indirect effects in current and future climates’, Indoor Built Environment, 23(3) (UKIEG Special Issue), pp.504–520
- Virk, G, Mylona, A, Mavrogianni, A, Davies, M, (2015) ‘Urban Heat Island analysis of Birmingham and Manchester for the creation of new Design Summer Years’, CIBSE Technical Symposium, London, UK 16-17 April 2015
- Virk, G, Mylona, A, Mavrogianni, A, Davies, M, (2013) ‘Developing and expanding current CIBSE design guidance on urban climates’, CIBSE Technical Symposium, Liverpool John Moores University, Liverpool, UK, 11-12 April 2013
- Zero Carbon Hub “Tackling Overheating in Homes” project, “Evidence Review – Methodologies” report
Review, testing and CFD modelling of fuel cell micro CHP technology for residential and commercial buildings
Project type: Knowledge Transfer Partnership with CIBSE and St Andrews University
Research Associate: Dr Alem Tesfai
Academic Supervisors: Prof John Irvine and Dr Paul Connor, St Andrews University
Date: August 2013 - July 2015
The project aimed to review micro CHP systems available in the market, including their technological and financial benefits in comparison to conventional grid power supply systems.
A fuel cell based micro-CHP system was installed at CIBSE HQ contributing to the building’s electricity and hot water load. Its monitored performance has been reported in a series of blogs and conferences, including the CIBSE Technical Symposium. Technical guidance is currently in preparation, giving details of the technology, its commissioning process and on-site performance,
The project team is currently reviewing funding opportunities to further extend the life of the project to include the performance of more fuel cell based systems and allow comparisons with more conventional energy systems. Alem organised a meeting with interested members of the Heating and Hotwater Industry Council (HHIC) to explore areas of common interest and potential support for a collaborative project.
Dissertations for Good
Project type: Dissertation pilot with NUS and University of West London
Academic Supervisor: Dr Ali Bahadori-Jahromi
CIBSE supported ‘Dissertations for Good’ pilot run by the NUS (National Union of Students). This programme aims to match up students and companies who can help them with their dissertations, with the eventual aim of putting those dissertations to use for the public benefit. CIBSE informed the dissertations of seven engineering students, supervised by Dr Ali Bahadori-Jahromi from the department of Civil Engineering in the University of West London (UWL), on the subject of building adaptation to the impacts of climate change.
iSERVcmb: Inspection of HVAC Systems through continuous monitoring and benchmarking
Project type: Intelligent Energy – Europe (IEE) funded project
Coordinated by: Prof Ian Knight, Cardiff University, Welsh School of Architecture
Date: 2011 - 2014
CIBSE was a partner in a three-year EC funded project, iSERV, which was concluded in April 2014. The project looked at the use of continuous monitoring as an alternative to physical inspections of services plant and benchmarking. The iSERV project has provided a unique approach to understanding and reducing operational energy use in building services across Europe. It has accumulated a unique set of operational data for building services components during its three-year period and acquired data from 16 countries around Europe. CIBSE’s role was to contribute to the promotion of the project’s outputs to CIBSE members, and offer a direct dissemination route of the knowledge in the form of professional guidance and information campaigns.