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For the first time in HVACR Vietnam, the Vietnam Green Building Council (VGBC) will be leading a series of seminars during the 3 days exhibition. With the support of other local and international associations, VGBC will invite prominent speakers in the HVACR industry to discuss pertinent issues on green building, energy efficiencies and how existing HVACR companies can improvise their products and services.
VGBC and EEN-Vietnam will host a series of seminars and technical talks to provide networking and learning opportunities for interested visitors and professionals. There’ll be 2 talk series that run parallel in 2 conference rooms inside: a series on HVACR topics and a series on green building topics.
On the HVACR track, we have invited a number of international and local experts who will speak on a variety of topics, such as:
*Above schedule is not final and is subjected to changes by the Organiser.
Steve Brown's research interests include refrigeration and air conditioning, alternative refrigeration cycles, alternative refrigerants, organic Rankine cycles, alternative energy, thermodynamic modeling, two phase heat transfer, human thermal comfort modeling, and bio heat transfer. He is the recipient of the 2001 Ralph Teetor Educational Award from the Society of Automotive Engineers, was named a DuPont Young Professor Award recipient for the period 2001-2004, received the 2010 ASHRAE Journal Best Paper Award, was awarded the Provost Award for Overall Teaching in 2011, was elected an ASHRAE Fellow in 2013, received the International Journal of Refrigeration Best Paper Award for ones published in 2013/2014, and was honored with the ASHRAE Distinguished Service Award in 2015. He serves as an ABET evaluator, is an Associate Editor of Science and Technology for the Built Environment (formerly known as HVAC&R Research), and is active in ASEE, ASME, IIR, and ASHRAE, where he is a member of two technical committees. He is a registered professional engineer in the State of Maryland.
A simulation model is presented that allows one to quickly and easily create a Peng-Robinson equation of state for not-so-well-described refrigerants (ones where little or no experimental data are available). It also allows one to quickly and easily create Peng-Robinson equations of state for a large number of theoretical refrigerants by parametrically varying critical state properties, acentric factor, and ideal gas specific heat at constant pressure. In both cases, the Peng-Robinson equations of state can be coupled with the cycle model to allow for easy, fast, and inexpensive screening and evaluation of the performance potentials of a large number of well-described and not-so-well-described refrigerants in a subcritical vapor compression cycle.
Many of the saturated halocarbons widely used in air-conditioning and refrigeration applications, in some organic Rankine cycle (ORC) applications, and as propellants, solvents, blowing agents, fire suppressants, and the like are potent greenhouse gases possessing what society is increasingly recognizing to be unacceptably large global warming potentials (GWP). More alternative “environmentally-friendly” working fluids must be identified and commercialized for the above mentioned applications if we wish to slow the process of global climate change resulting from the use of these high GWP working fluids. My current research is directed toward the identification of and characterization of alternative, low-GWP working fluids for a wide-range of HVAC&R and ORC applications. This presentation summarizes some of our recent work on property measurements for several unsaturated halocarbon refrigerants and provides a brief summary of a large screening and simulation study undertaken to identify potential alternative refrigerants for several HVAC&R applications.
A review of alternative cooling technologies that could displace vapor compression technology, focusing particularly on sorption cooling, desiccant cooling, magnetic cooling, thermoacoustic cooling, thermoelectric cooling, and transcritical carbon dioxide cycles. Recent technological advances will be reviewed and an assessment will be made as to the potential of each technology to enter the market as a supplement to or replacement of vapor compression equipment in the next 20 year period.
Dr. Xianting Li is the President of E1 Commission, International Institute of Refrigeration (IIR), and a full professor and director of Institute of Built Environment in Department of Building Science, School of Architecture, Tsinghua University. He is also the Vice-President of Chinese Association of Refrigeration, editorial board member of Indoor and Built Environment, International Journal of Ventilation, Journal of Building Engineering etc., a fellow of International Society of Indoor Air Quality and Climate (ISIAQ) and fellow of International Building Performance Simulation Association (IBPSA).
The energy consumption for building sector is more than 30% in many countries. There are a lot of buildings in which cooling is needed all year round, such as data center, subway, tropical buildings etc. Traditionally all the heat gain is handled by air conditioning system and most air-conditioners are air-source, which results huge energy consumption. In fact, there are different kinds of natural cooling sources which can be used to decrease the cooling load or improve the performance of air conditioning system. In the lecture, the heat transfer process between indoor environment and the ambient is firstly analyzed after introducing the traditional air conditioning system. The temperature difference between the available natural cooling sources in different seasons and the indoor temperature at different positions is analyzed. Pipe-embedded envelope is then introduced to remove the heat gain from windows and walls with natural cooling. The indoor free running temperature with pipe-embedded envelope and cooling load reduction ratio is calculated. Thirdly, air conditioning system combining vapor compression and thermosyphon is introduced to provide efficient cooling to buildings. The type and performance of the combined air conditioning system is illustrated. Finally, the energy efficiency of cases with pipe-embedded envelope and combined air conditioning system are demonstrated.
Ice storage systems are used to shift peak loads to nonpeak period, and reduce the operating cost of air conditioning systems. In the seminar, the classification of ice storage systems, configuration of chiller and storage, sizing ice storage systems, operation and control strategies are introduced. Finally, several examples are given to show how to design successful ice storage systems.
Variable refrigerant flow (VRF) systems are one kind of direct-expansion (DX) heat pump systems. VRF systems transport heat between an outdoor unit and a network of indoor units located within the conditioned space through refrigerant piping installed in the building. In the seminar, the types of VRF systems and common indoor units, capacity design of outdoor and indoor units, ventilation methods etc. are introduced. Finally, the simulated and tested annual performance of VRF systems is illustrated, and how to improve the performance of VRF systems is introduced.
Centrifugal chillers represent a significant HVAC investment for the building owner and each type of machine requires specific operating, servicing and maintenance practices to protect the investment. They are usually the most economical means to cool large buildings. Most design engineers will sooner or later use centrifugal chillers to meet their design needs. A general understanding of their design and operating characteristics will assist in applying the product properly and avoiding major pitfalls. The purpose of this seminar is to provide design engineers with a basic knowledge of how centrifugal chillers operate so that they will better understand the interdependency of the chiller and the chilled water plant.
Conventional designs of chiller plants are typically based on the peak cooling loads of buildings, while only a small proportion of time in a year the cooling load of a building is at its peak level. However, the cooling load distribution in design can be considered carefully to select the more optimal combinations of chiller plants, which have the highest probability to operate at high part load ratio (PLR) and COP.
The escalating cost of energy combines with the need for reduced CO2 emissions to demand more efficient energy recovery solutions, particularly in applications that consume a large amount of energy. One solution that can be effective is the recovery of energy from waste heat.
Mr Nguyen Hoang An- Technical Manager- Grundfos Viet Nam –An has 10 years’ experience consulting and providing energy and environmental friendly solutions to Viet Nam market. Grundfos sum up our corporate values in the words of: Be responsible >think ahead>innovate.
This is our responsibility, our foresight and our focus on creating groundbreaking solutions and ideas, which have made Grundfos one of the world’s leading pump companies. Grundfos strengthened our leading position within energy and environmentally friendly solutions and strong marketing of energy saving solutions generated positive results. We also want to be active in improving the environment in our own facilities and so we have made our own strategy for our CO2 footprint. This is about minimizing our negative footprint on the environment.
Alvin Chan is Regional Application Consultant of BELIMO Actuators Ltd, a subsidiary of BELIMO Automation AG, Switzerland. He is based in Malaysia, while his job requires him to visit all SEA countries regularly to meet with consultants and building owners.
Alvin has 18 years working experience, all of which in HVAC, mainly in technical roles. He started his career in Facilities Engineering with a semiconductor assembly & test facility, and then at TROX, an air-water products specialist multinational with headquarters in Germany, he was first based in Malaysia and later in the UAE, in various technical roles, culminating as R&D Manager, and after that, a stint with a reputable M&E consultancy in Malaysia prior to joining BELIMO. He holds B Eng (Hon) Mechanical from National University of Malaysia, he is a Green Building Facilitator (Malaysia), and also an Assoc Member of ASHRAE since 2006
How intelligent control valve (Energy Valve) can help in saving energy
There are many challenges in designing and operating a variable flow chilled water system
We will describe some of these challenges, and how to address them with Energy Valve, especially emphasis will be placed on energy saving – such as eliminating and improving low Delta T syndrome. We also discuss other solutions available and their pros and cons.
Mr. Umang Sharma is Director & CEO of Bry-Air Malaysia, a US origin, global leader in Energy Conservation and Dehumidification, having manufacturing plants in USA, India Malaysia, China and Brazil.
Mr. Umang has over 30 years of working experience in the field of energy and environment and has worked in Asia Pacific extensively. He is an active member of ASHRAE and member of several Green Building Councils. He graduated in Mechanical Engineering and did his MBA from UK.
Dedicated Outdoor Air Systems (DOAS) for Green Buildings
The Green Building movement is driving the HVAC community to look at innovative solutions for reducing the energy cost and better IEQ. The ventilation and air conditioning system which is a key component in Green Building design is on the verge of a paradigm shift. This shift is providing designers opportunities to explore energy efficient designs. The new initiatives are aimed at improving health, comfort and productivity.
Dedicated Outdoor Air Systems (DOAS), with parallel terminal system, offers a migratory path from the single all-air variable air volume systems.
It offers an excellent choice to address IAQ, Humidity Control “at the source” and help buildings become green.