Chandana Dalugoda trained as an Air conditioning & Refrigeration engineer and qualified as a chartered engineer in 2006. His experience includes designs, installations, commissioning and maintenance of HVAC & R systems. As a HVAC Consultant, his responsibilities have ranged from detailed designs, preparation of drawings, site supervision and commissioning of HVAC systems. As a lecturer, he has prepared students for City & Guilds of London Institute in Refrigeration examinations from 1980 to 2000. He has been a visiting lecturer at University of Moratuwa, in the Building Economics Department for under graduate programmes since 2000. He is a visiting lecturer for MSc programmes of Electrical Engineering & Electrical Installations Since 2006 to date. He is a guest lecturer for mechanical engineering department of University of Moratuwa. He is also a visiting lecturer at Sri Lanka Institute of Advance Technological Education, HNDE programme in mechanical engineering. He is a visiting lecturer at IESL College of Engineering, for Graduate Diploma Level. He also conducts various public lectures at the Institution of Engineers Sri Lanka (IESL), currently conducting the CPD course - AC Design annually. Also he conducts public lectures at the ASHRAE Sri Lankan Chapter 171.
He is a lecturer for National Cleaner Production Centre (NCPC) for the Certificate Course on Corporate Environmental Sustainability through Greening the Industries. Also he is a lecturer for Sri Lanka Energy Managers Association (SLEMA), who conducts workshops on “Energy Efficiency of Air Conditioning Systems”. Also he is a lecturer for Build Green Sri Lanka- Ceylon Institute of Builders Green Project Manager’s training program. Also he is a lecturer for Green Building Council Sri Lanka, for Associate Professional course.
Dalugoda has been engaged in the field of HVAC&R field for 41 years. He was also attached to HILSON MORAN in the UK as a senior mechanical design engineer in the field of HVAC and involved in various designs of HVAC systems in England.
Chandana Dalugoda is managing Partner of Chandana Dalugoda Consultants, an engineering practice in Sri Lanka and is a senior consulting engineer in the HVAC & R field. Dalugoda served as Chapter President for two terms, 2004/2005 & 2012/13 of ASHRAE Sri Lankan Chapter 171.
He is a ASHRAE Fellow, member of CIBSE, Fellow of IESL & Member of Consulting Engineers Association of Sri Lanka. He is actively engaged in the Institution of engineers (IESL) voluntary programmes. He has authored articles and papers (8 articles) for the IESL and many articles for ASHRAE Sri Lankan Chapter. He is a recipient of 2015 ASHRAE Chapter Service Award & 2015 ASHRAE Regional Award of Merit. He was appointed as ASHRAE Distinguished Lecturer on July 1, 2011 and continuing to date.
Reducing Carbon Footprint of Buildings in Developing Economies
Energy waste from fossil fuel usage is very high in developing economies countries. Increased heat transfer through building fabric, seldom use of energy efficient equipment, lack of building codes and regulations to reduce energy consumption are the main courses. This presentation provides and over view of how to reduce energy waste by utilizing ASHRAE Standards 90.1, 189.1, 62.1, & 55 and achieve reduction in carbon foot print.
Air Conditioning Systems for Tropical Humid Climates
Although air conditioning is widely used in the world, it has application constraints in tropical humid countries. Countries situated with thin tropic of Cancer & tropic of Capricorn gets solar radiation almost through the year and there will be only two seasons, summer and monsoon. Also there are limitations of applying some energy conservation methods such as free cooling due to high humidity levels. Addressing the indoor air quality, large amount of cooling load comprises of ventilation air quantity, especially in densely populated buildings thus cooling load increases substantially. This presentation discusses techniques to overcome high ventilation loads in hot humid countries, such as applying heat recovery and demand control ventilation systems.
Most air conditioning systems fail to provide adequate fresh air during the design stage and try to rectify after completing the installation. This would bring about additional cooling requirements which cannot handle the existing equipment. This paper discusses the use of ASHRAE standard 62.1- 2013 Ventilation for Acceptable Indoor Air Quality to determine the minimum ventilation air requirement using ventilation rate procedure method.
Since sun path is almost over head throughout the year in tropical countries, load due to thermal radiation on roofs & west/east exposures will be an important component of the heat load and methods of solar gain reduction is discussed.
Cooling Load Calculations ASHRAE CLTD/SCL/CLF Method
Presently every one of us is using computerized software for cooling & heating load calculations. However, engineers in developing countries may not have access to premium software offered by various companies at very high cost. Hence this presentation reviews in-depth practice of manual calculation ASHRAE CLTD/SCL/CLF method, for calculating cooling load for non-residential buildings.
Initially discuss the importance of zoning and local climatic conditions. Participants are given calculate the overall heat transfer coefficient for building fabric elements although some of the tables provided calculated data. Finally participants are taught to establish data that are required for plant selections. Establishing entering & leaving conditions of the cooling coil and calculation of Supply air flow rate using Psychrometric chart. It also emphasizes the importance of doing cooling load calculations and not use rules of thumb as an alternative source.
HVAC Water System Designs
HVAC Air System Designs
Sustainable HVAC Designs for Green Buildings
Green buildings are more and more popular in the present day for reducing energy in buildings. Green building certification such as LEED of USGBC & ASHRAE Green building standard 189.1 has become prime tools for achieving green building status. This presentation provides and over view of how to achieve sustainable HVAC designs for Green Buildings by complying with ASHRAE Standards 90.1, 189.1, 62.1, & 55.
Applied Psychometrics for Air Conditioning Systems
Firstly understanding the basic contents of the psychrometric chart and then discuss the basic psychrometric processes. A detailed Psychrometric approach is carried out utilizing the data available from cooling load calculations to determine the coil conditions and selection of the air conditioner. All fresh air, high latent load and humidity control applications are discussed. Importance of Sensible heat ratio is discussed and distinguishes the defense between high & low sensible heat applications. This presentation is suitable for young as well as experienced engineers that provide basic knowledge of Psychometry and its applications in practice.