Chandana Dalugoda trained as an Air conditioning & Refrigeration engineer and qualified as a chartered engineer in 2006. His experience includes the designing, installation, 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 programme of Electrical Installations and 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.
Dalugoda served two-year term as an ASHRAE Distinguished Lecturer from July 1, 2011 to June 30, 2013. During his term, he conducted 03 DL lectures. “Applied Psychrometrics for Air Conditioning” in Chennai India 29th February 2012. “Air conditioning Systems for Tropical Humid Climates” in Delhi India 03rd March 2012. “Air conditioning Systems for Tropical Humid Climates” in Al Khuwair Oman, 30th March 2013. He conducted a full day workshop on “Practical Guidelines of Air conditioning System Design for Tropical & Humid countries” in Abu Dhabi, from 8.00 a.m. to 5.00p.m. on 09th May 2014 conducted by Philippine Society of Mechanical Engineers (PSME) & ASHRAE Falcon Chapter.
Dalugoda has been engaged in the field of HVAC&R field for 39 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 times, 2004/2005 & 2012/13) of ASHRAE Sri Lankan Chapter 171. He is a member of ASHRAE, CIBSE, 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 ASHRAE Sri Lankan Chapter. He is a recipient of 2015 ASHRAE Chapter Service Award & 2015 ASHRAE Regional Award of Merit.
u Air Conditioning Systems for Tropical Humid Climates
GBCI Approved | 2 CE Hour | 0920010351 AIA Approved|2LU/HSW|DALUGODA02
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.
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.
u 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
u Reducing Carbon Footprint of Buildings in Developing Economies
GBCI Approved | 2 CE Hour | 0920010353 AIA Approved|1LU/HSW|DALUGODA04
ASHRAE 90.1-2003 Energy Standard for Buildings except Low-Rise Residential Buildings play a major role in designing of HVAC systems for LEED certified Green Buildings. In order to reduce carbon foot print of modern buildings & existing buildings, now it is a common practice to comply with the 90.1 Standard, even otherwise building certification program is implemented. In developing economies countries have a major advantage of using 90.1 Standard to reduce the energy use in buildings. It also highlights the importance of implementing 90.1 Standard, fully or partly in building regulations in developing economies countries to fight with global energy crisis. And also providing comfortable environments in built environment.
This presentation highlights the importance of implementation of 90.1 Standard for designing HVAC systems, building fabric etc. to achieve sustainable goals. It emphasized the value of complying with
90.1 Standard as much as possible to reduce the energy cost and achieving lowest life cycle costs of HVAC system.
u Sustainable HVAC Designs for Green Buildings
GBCI Approved | 2.5 CE Hour | 0920010352 AIA Approved|2.5LU/HSWs|DALUGODA03
This presentation guides how to design an energy efficient HVAC system for green buildings utilizing ASHRAE Standard 90.1-2013 Energy Standard for Buildings except Low-Rise Residential Buildings, 62.1-2010 Ventilation for Acceptable Indoor Air quality, 189.1 Standard for the Design of High Performance Green Buildings & ASHRAE Green Guide.
Applying demand control Ventilation (DCV) systems for outdoor air ventilation & car park extraction systems, Energy recovery ventilation systems (ERV) for outdoor air ventilation systems, applying VAV instead of CAV airside systems, Central CHW systems with variable temperature variable flow decoupled systems, selection of chillers , AHUs, FCUs and CTs to obtain overall energy efficiency of the HVAC system.