10 Jun

Online: ASHRAE Ventilation, IAQ and Energy Issues in Hot-Humid Climates – Past, Present and Future


16/06/2020 to 16/06/2020

    Title: Ventilation, IAQ and Energy Issues in Hot-Humid Climates – Past, Present and Future

    Speaker: Dr. Chandra Sekhar, ASHRAE DL

    Date: June 16, 2020

    Time: 03:00 PM CAT

    Registration Link: https://tinyurl.com/pceme4



    Chandra Sekhar, Ph.D.


    National University of Singapore
    Department of Building

    4 Architecture Drive, Singapore 117566, Singapore

    Dr. Chandra Sekhar is currently a Professor and Programme Director (M.Sc – Building Performance and Sustainability) and Co-Director (Centre for Integrated Building Energy and Sustainability in the Tropics) in the Department of Building at the National University of Singapore (NUS). He is also a Founding Director of Enhanced Air Quality Pte Ltd., a NUS Spin-off Company incorporated in June 2004, arising out of his research in the fields of indoor air quality (IAQ) and Energy. He has been an IAQ consultant in Singapore since 1993. He holds BE (Mechanical Engineering) from the University of Rajasthan (Malaviya National Institute of Technology), India and PhD (Mechanical Engineering) from the University of Adelaide, Australia, in the area of energy efficient cooling and dehumidification systems. In 1992, he joined NUS as a faculty and has since been teaching and conducting research in the areas of thermal comfort, ventilation and indoor air quality, energy efficient HVAC systems, building energy analysis/management and integrated building design/operation and has published about 250 papers in these areas in several international journals and conferences.

    Prof. Sekhar is an Associate Editor of ASHRAE Science and Technology for the Built Environment (STBE) [formerly HVAC&R Research] journal, Regional Editor (South East Asia) Indoor and Built Environment and an editorial board member of Energy and Buildings, Building and Environment, International Journal of Ventilation and International Journal of Sustainable Built Environment. He is a regular reviewer of articles for several international journals, such as, ASHRAE STBE and Transactions; Indoor Air; Energy and Buildings; Building and Environment; Energy; International Journal of Ventilation & Indoor and Built Environment. He is a co-inventor and holds 3 US and other patents in the area of energy efficient air-conditioning system with zonal ventilation control for enhanced indoor air quality. He is actively involved in the development of local IAQ, ventilation and energy standards in Singapore and received the SPRING Singapore Merit Award 2012 in recognition for his contributions towards Quality and Standards in Singapore. He is a member of the International Scientific Committee of the Healthy Buildings, Indoor Air, ROOMVENT, CLIMA and IAQVEC series of conferences. He was the Chair of the Steering Committee for ASHRAE IAQ2010 conference in Kuala Lumpur in 2010 and continues to be on the steering committee of subsequent ASHRAE IAQ conferences (Vancouver, 2013 and Alexandria, USA, 2016).

    Prof Sekhar is a Fellow of ASHRAE and the International Society for Indoor Air Quality and Climate (ISIAQ). He has been an ASHRAE Distinguished Lecturer since 2006 and is regularly invited as a DL speaker around the world. He is a recipient of the Environmental Health Award (2014), Exceptional Service Award (2013) and the Distinguished Service Award (2010) from ASHRAE. He is a co-recipient of The Enterprise Challenge award of the Prime Minister’s Office, Singapore in 2004 and ASEAN Energy Award in 2011. He is also a member of the Institution of Engineers, Australia (CPEng, IEAust). He currently serves as a Director-At-Large for the Society and is also a member of SSPC 62.1, SGPC 10, TC 2.1 and TC 4.3. He is a past Chair of the Environmental Health Committee (EHC, 2012-2013) and was a member of the IEQ-Global Alliance Ad Hoc Committee (2013-2017), EHC (2006-2012 & 2016-2018). He has also served the ASHRAE Singapore Chapter in various capacities, including as its President during 2010-2011 and as a BOG member.


    Ventilation, IAQ and Energy issues in hot humid climates – Past, Present and Future

    This talk will provide an overview of the ventilation, IAQ and energy issues in commercial office buildings in hot humid climates.  It presents the design challenges based on climatic differences with due consideration given to local codes and ASHRAE Standards 55, 62.1 and 90.1.  Typical HVAC design for different building types in hot humid climates will be covered with emphasis on both design and part load characteristics.  The role and importance of cooling and dehumidifying coil and limitations in conventional designs will be highlighted.  Effective and practical zone-level ventilation control will be introduced and the notion of energy efficient healthy buildings will be presented.