EVENTS | TECHNICAL SYMPOSIUM pathogens at all stages of the public health engineering cycle, so the design can then be improved to mitigate the risk of transmission. In their paper, , John Parkinson and Geoffrey Levermore considered whether the pandemic could have an impact on energy use, in terms of urban heat island intensity. They found an ambient temperature reduction of up to 0.6K during the pandemic, as traffic levels fell by around 70%, using sensor and measurement technology in several locations across the city centre to compare data during the pandemic with previous years, when temperatures were fairly uniform. City of London thermal comfort map All season Season Short term Short term season Transient Modelling outdoor conditions Green areas are comfortable for more than 90% of the time, while red areas are comfortable for less than 25% of the time in winter and less than 50% in summer In the session on Developing enhanced understanding of external environments, SimScales Khan made the case for more accurate wind-pressure coefficients in building simulations and, in particular, the mandated use of dynamic CFD simulations. He said the accuracy of wind pressure was more pertinent in buildings that rely on natural ventilation for air quality and thermal comfort. RWDIs Ruth Shilston described the new , which aims to help design teams understand the impact of tall buildings on Londons microclimate. It combines climate data with solar and wind simulations to provide a measure of thermal comfort through a Universal Thermal Climate (UTC) Index. RWDI worked with the City of London to produce a scale which assessed the % of time that a space would be usable. It developed a colour-coded table showing the percentage of hours the UTC was acceptable. This is reflected in the legend of the map above. In the same session, Peter Simmonds discussed the findings in his paper . Simmonds explained why it is important to take into account the height of buildings when carrying out heating and cooling simulations, because temperatures and wind change according to the A new online customer portal www.sbsonline.net An additional service designed to give customers access to their account information 24/7, launching in July 2021. View, Print and Download Orders Quotes Delivery Notes Account Ledger Information Invoices Online Payments Product Information Credit Notes Account Status P.O.D s Smith Brothers Stores Ltd @SBS1897 24 August 2021 www.cibsejournal.com CIBSE Aug 21 pp22-25 Technical syposium.indd 24 23/07/2021 14:39