Jointly Organised with ASHRAE MALAYSIA CHAPTER


SYNOPSIS

Variable Refrigerant Flow (VRF) System is a direct expansion (DX) technology that built on the standard reverse Rankine vapor compression cycle. The system is similar to split units thermodynamically. The main differences for VRF are the multiple indoor unit connection with long piping length and expansion devices located at indoor units.

Air cooled VRF system was invented/commercialized in year 1982 in Japan and soon getting very popular due to the simple design configuration and significant energy saving under partial load.

In year 1996, water cooled VRF was invented/commercialized with the combination technology of water cooled heat pump and air cooled VRF system. Since then, VRF technology has dominate the China and Japan HVAC market especially during the rapid property development in China for the past 15 years. It is estimated that more than 70% of the global VRF market share is in China and Japan. Although the application of VRF system is getting popular in Southeast Asia and United States, the application of using Water Cooled VRF system is still very new in Malaysia market.

This course provides an overview of Variable refrigerant flow (VRF) system technology, its consideration for design and application of VRF system in Green Buildings. The advantages of water cooled VRF system for buildings will also be discussed.


SPEAKERS

1) Ir. Ng Yong Kong

Ir. Ng Yong Kong is a Professional Engineer registered with the Board of Engineers, Malaysia ( BEM ) and is currently ASHRAE Director and Regional Chair ( DRC ) Region XIII. He was also the Council Member for the Institution of Engineers, Malaysia ( IEM ) 2015-2018 and was Treasurer for Malaysia Green Building Confederation ( MGBC ) 2016-2018.

He obtained his B.Eng. (Hons in Mechanical Engineering) from University of Malaya, Kuala Lumpur in 1985 and an MBA (Hull, UK ) and has more than 35 years experience in the HVAC industry having worked as a System and Application Engineer in two major chiller manufacturers, air diffusion and control companies. He is also a member of the ASHRAE Indoor Air Quality Steering Committee 2010, Panel of Judges for ASHRAE Technology Award 2011-2013 and is currently the Malaysia Green Building Index Facilitator (GBIF), trainer and examiner. He is also one of the working group members in various SIRIM MS Standards like the MS1525, MS2578, MS2449 and MS2678.

Ir. Ng is the director of NYK Engineering & Trading S/B & BEZAIRE S/B and was the Past President for Malaysia Air-Conditioning and Refrigeration Association (MACRA I). He is a a qualified Trainer under the HRDF since 2014. He is currently a working member in IEM Professional Practice ( PPC ) and Examinations and Qualifications ( E&Q ) Committee.


2) Mr Poh Kai Sin

Mr. Poh Kai Sin obtained his Bachelor Degree in Mechanical Engineering and Master in Engineering Science from University of Malaya, Malaysia. He has actively involved in HVAC research and development, Building Mechanical Services in a M & E Consulting Firm involving HVAC system design, IAQ audit, testing and commissioning of various HVAC systems including VRF system and chilled water system. He was also involved in facilitating the execution of various green buildings in achieving Green Building Index (GBI) green building rating tools in Malaysia.

He has published two technical papers in international ISI journals in the area of IAQ and UFAD system. He has vast experience and involvement in building services especially in HVAC system such as VRF system, chilled water system and UFAD system. With his design experience as well as the on-site inspection and IAQ audit experience, he has helped to solve many site issues and provide guidance in proper HVAC system’s design.

Mr Poh is currently the Asia Pacific Technical Director of Qingdao Hisense Hitachi Air-conditioning Marketing Co., Ltd. He served as the sub-committee in MASHRAE. He also served as a committee in Building Services Technical Division (BSTD) in the Institution of Engineers, Malaysia (IEM).