Herman Calleja, M.Arch B.E&A.(Hons)

Consultant, , AA Graduate School

Professional qualifications

RIBA, ARB, BREEAM AP, Perit

Research Interest

Herman is interested in the application of parametric design research within the field of Environmental Design. Pursuing this research Herman has participated in various Smart Geometry workshops since 2008. He has attended tuition under Arthur Mamou-Mani, Martha Tsigkari and Ecologic Studio and has recently completed a Parametric Engineering course at Imperial College. Herman has also contributed at a number conferences as NCEUB and PLEA. His main area of interest is the combination of climate-based daylighting modelling with the assessment of occupant thermal comfort through a parametric design platform.

Biography:

Herman Calleja has practiced as an architect in Malta and Spain before joining the M.Arch in Sustainable Environmental Design at the AA, graduating with distinction in 2012. Since then he has worked as an Environmental Consultant at BDSP/ChapmanBDSP assisting various design teams with regards to environmental design, occupant comfort, façade design, CFD analysis, daylighting and passive design strategies that reduce heating, cooling and lighting demand. At ChapmanBDSP Herman has introduced the application of parametric environmental design and has worked on a variety of projects including a university building for the Institut Mines-Télécom with Grafton Architects, the LSE CBR with RSH+P, a mixed-use development with Foster+Partners, the Dubai Observation tower with Santiago Calatrava, a high-rise office tower with AHMM and a private residence in UAE with Zaha Hadid Architects. Herman is interested in the application of parametric design research within the field of Environmental Design. Pursuing this research Herman has participated in various Smart Geometry workshops since 2008. He has attended tuition under Arthur Mamou-Mani, Martha Tsigkari and Ecologic Studio and has recently completed a Parametric Engineering course at Imperial College. Herman has also contributed at a number conferences as NCEUB and PLEA. His main area of interest is the combination of climate-based daylighting modelling with the assessment of occupant thermal comfort through a parametric design platform.

Publications

2017, Herman Calleja, Passive Low Energy Architecture (PLEA) 2017 - Design to Thrive, Climate-Responsive Façade Design for Office Buildings in London, NCEUB 2017, iii
Through parametric analytical work, this research assesses the impact of overheating risk and design potential for free running offices in London, when considering CIBSE TM49 2050 weather data; thus, omitting the need to rely on mechanical cooling systems during the warm season. The results indicate the possibility to design out the need for cooling. The study also finds a strong relationship between overheating and the maximum average hourly internal heat gains, thus establishing a recommended early design stages threshold. https://plea2017.net/wp-content/themes/plea2017/docs/PLEA2017_proceedings_volume_III.pdf

2012, Herman Calleja, 2nd Conference: People and Buildings, Passive Design Strategies for a Digital Creative Industry Hub in Malta, Network for Comfort and Energy Use in Buildings
The cooling load for offices in Malta may account up to seventy per cent of the workplace total electricity consumption due to the influence of solar radiation and elevated internal heat gains. Therefore, the research documents the design of an office complex, set as a catalyst in a disused dockland area, which relies on passive cooling strategies. The study identifies ground cooling, nocturnal ventilation and evaporative cooling as the main potential cooling strategies for this typology in the Maltese climate. Subsequently the effectiveness of each strategy was analysed through dynamic thermal modelling. The research led to the design of solar chimneys that draw ground-cooled displacement ventilation and the use of roof ponds. Finally the research, through further thermal modelling, solar and daylight studies, informed the workplace morphology, façades and external areas such that thermal and visual comfort is ensured for the occupants. http://www.nceub.org.uk/mc2012/pdfs/mc12-25_calleja.pdf

2008, Vincent Buhagiar and Herman Calleja, PLEA 2008, Lighting and Thermal Performance of Innovative Shading Devices: New Insights into their Aesthetics and Control in a Mediterranean Climate, Proc. of PLEA 2008 Conference, Dublin.
The study evaluates the potential success (or failure) of such shading devices, from both their aesthetic and functional perspectives, as part of a passive design strategy adopted by the architect. Through environmental design and solar geometry, experimental simulations were generated in architectural science modelling software package Ecotect developed by Andrew Marsh. Moreover a novel computer model termed Solar Control was developed by the authors in order to assist architects at an early stage during design. https://www.um.edu.mt/library/oar/bitstream/handle/123456789/16697/OA%20-%20%20474%20Lighting%20and%20Thermal%20Performance%20of%20Innovative%20Shading%20Devices%20New%20Insights%20into%20their%20Aesthetics%20and%20Control%20in%20a%20Mediterranean%20Climate.pdf?sequence=1&isAllowed=y

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