NG Yan Yung Edward 吳恩融

Research Projects


  • Application of Sunlight and Shadow Analysis for Layout and Site Planning
  • NG Yan Yung, TREGENZA Peter*, WONG K. S.*, HO Betty*
    1 March 2007
    Planning Department, HKSAR Government

    This study attempts to develop an methodology for Planners in the Hong Kong Government for city design.
    Sunlight (or solar radiation) on humans in the summer months could upset the body’s energy balance and causes thermal discomfort. Sunlight on buildings could increase their cooling load. On the other hand, sunlight inactivates germs and alleviates some of the negative effects of dampness. These are the welcome advantages in our hot and humid climatic conditions. Buildings and their recesses, and open spaces, should be designed to provide adequate duration of exposure to the sunlight in order to capture the benefits. For design and planning, two considerations are typically needed. Firstly, the availability of sunlight through a window to the interior space must be considered. These windows, especially windows of residential spaces, are commonly sensitive receivers. Secondly, the availability of sunlight to open spaces should also be considered and carefully designed. The methodology is straight forward. Firstly, the sensitive receivers are identified. Secondly, using a suitable tool, the Sunshine Hour or Sunshine Probability is assessed. Thirdly, the result could then be compared to the assessment criterion, and a judgement could be made. (SS06423)


  • Ducted Wind Turbine - A Partnership Project with Schools
  • NG Yan Yung
    3 January 2004
    CLP Renewable Energy Community Project 2004

    A new generation of “invisible” wind turbine will be investigated. The Energy Systems Research Unit (ESRU) of the University of Strathclyde originally developed the design. The advantage is that unlike normal wind turbine, it can be well integrated into the façade of buildings - hence less intrusive. The design is attractive to high-rise urban cityscape of Hong Kong due to its invisibility. However, its detailed design and feasibility is still to be investigated. Partner with 3 secondary schools to conduct experimental studies of the design for renewable energy generation, the project will benefit advanced secondary students to understand physics, mechanics, electricity generation, fabrication, measurement, data analysis, climate, and the development of a scholarly methodology to investigate a problem intellectually and creatively. Based on outline drawings, students will develop the design, fabricate the turbine, mount it on their school building, monitor its efficiency, calibrated against theoretical results and report their findings. The three secondary schools are Law Ting Pong Secondary School, Kiangsu-Chekiang College (Shatin), and Tai Po San Yuk Secondary School. The three schools were selected from over 20 schools invited to participate. (SS03558)


  • On-site Measurement of Natural Lighting of Public Flat
  • NG Yan Yung
    1 July 2001
    Ove Arup & Partners

    Hong Kong is the most densely populated city in the world. It boasts a development density of 2700 person per hectare. Typically, residential buildings are built to a plot ratio of 9 and site coverage of around 50%. This leads to 40-60 storey high buildings built very closely together. This study aims to assess daylight performance of newly constructed public housing in Hong Kong by collecting ’as is’ on-site daylight and visual data of residential unit(s). The data will be used to inform better design in future as well as to calibrate against existing design and computational tools. (EE01386)


  • A Pilot Study of Summer Outdoor Urban Thermal Comfort of Inhabitants in Hong Kong
  • NG Yan Yung
    1 April 2006
    CUHK Research Committee Funding (Direct Grants)

    Since SARS of 2003, the quality of the urban environment of Hong Kong has received a lot of attentions. .Is our outdoor spaces safe and comfortable for our daily activities?. is one of the many questions asked by the public. Planning Department has commissioned a study recently and concluded that a thermally balanced outdoor environment is conducive to public life. The study had initially plotted a chart relating the thermal comfort zones with solar radiation, air temperature and wind speed based on researches elsewhere in the Tropical regions. This understanding needs to be furthered with on site studies in Hong Kong. This piloted study intends to provide some data in this respect. In addition, the proposed study will also used this local dataset to calibrate prediction and simulation software developed in Germany and In the UK. The calibrated software will be useful providing predictions to new designs. (SS05989)


  • A Pilot Study of Using Large Eddy Simulation (LES) for High Density City Urban Studies
  • NG Yan Yung, Siegfried Raasch*, Dipl.-Met. Marcus Oliver Letzel*
    1 December 2007
    CUHK Research Committee Funding (Direct Grants)

    This study proposes to understand Hong Kong’s high density urban fabric using large Eddy Simulation (LES) studies. LES is a powerful computational fluid dynamics scientific technique known to produce reliable results for turbulence studies. The significance of the study is to pilot an application use of LES for real life problems. This has never been done before. The study will on the one hand refine the scientific working of LES, on the other hand provide useful case study data for design and planning. (SS07761)


  • A Pilot Study on: Review of Daylight Factors Recommendable / Acceptable to Hong Kong in Consideration of the Local Climate and Sociocultural Aspects
  • NG Yan Yung, CHAN Ying Keung (Dept of Sociology), TREGENZA Peter*
    1 March 2001
    CUHK Research Committee Funding (Direct Grants)

    It is important to provide adequate daylight to building interiors for health and safety reasons. Researchers have indicated a close relation between the biological well being and the amount of daily light dose required. In urban Hong Kong, buildings are typically spaced much closer together than their foreign counterparts. They provide a lower overall daylight performance. Under such a context, it is perceivable that inhabitants of Hong Kong would demand a different level of daylight performance from their western counterparts. However, there has been no study to guide designers and law makers as to what could be considered minimum, adequate or reasonable. This cross discipline study aims to establish the minimum acceptable daylight performance (in terms of average daylight factors) of residential spaces in Hong Kong. The study focuses on mass and public housing for low and middle-low income groups. The minimum daylight standard will be the basis for establishing town planning and building design guidelines as well as assisting the law makers to make new laws to safeguard the health and safety aspects of the living environment in Hong Kong. (SS00540)


  • Term Consultancy for Provision of Advisory Services – Cat. A – Term Consultancy for Expert Evaluation and Advisory Services on Air Ventilation Assessment (PLNQ37/2007)
  • NG Yan Yung, WONG K S*, HO Betty*, FUNG Chi Hung Jimmy*
    7 September 2007
    Planning Department, HKSAR Government

    Urban Ventilation, air quality and planning development is a topical issue in Hong Kong. Planning Development of HKSAR has recently launched the Air Ventilation Assessment protocol. The protocol was earlier developed by Professor Edward Ng of Department of Architecture at CUHK. All major government developments and planning exercise in Hong Kong now have to submit evidences that the planning and design does not adversely affect the urban air ventilation of the city. All AVA submissions will be examined by the Planning Department. The team consultancy allows experts to give advices to Planning Department for Air Ventilation Assessment (AVA). (SS07331)


  • Term Consultancy for Provision of Advisory Services on AVA Submission
  • NG Yan Yung, Shen Helen*, RAO Anjanna*, Dai Lim Tsz, Grazia*, Loy, Michael M.T*, TAM Iris*
    15 April 2006
    Planning Department, HKSAR Government

    Urban Ventilation, air quality and planning development is a topical issue in Hong Kong. Planning Department of HKSAR has recently launched the Air Ventilation Assessment protocol. The protocol was earlier developed by Professor Edward Ng of Department of Architecture at CUHK. All major government developments and planning exercise in Hong Kong now have to submit evidences that the planning and design does not adversely affect the urban air ventilation of the city. All AVA submissions will be examined by the Planning Department. The team consultancy allows experts to give advices to Planning Department of Air Ventilation Assessment (AVA) submissions of project proponents. The work also assembles research and project data of AVA works in Hong Kong on behalf of Planning Department, and eventually compiles a report to suggest ways to advance the agenda to provide a better ventilated urban design policy for Hong Kong. (SS05374)



Research Publications


  • "Air Ventilation Assessment System for Planning - Designing for Better Air Ventilation for Human Comfort in High Density Cities, an experience from Hong Kong" (co-authored with KATZSCHNER L, KWOK K, SUN D and YAU R). Paper presented in the The 3rd International Symposium on Wind Effects on Buildings and Urban Environment, organized by Tokyo Polytechnic University, Tokyo, Japan, 2008.03. p.309-319.



  • "Comfort Temperature for Naturally Ventilated Buildings in Hong Kong". Architectural Science Review (co-authored with CHENG BO KI) vol.49 no.2, Sydney, Australia: The University of Sydney, 2006.06. pp.179-182.
    (CUHK Library Call No: ARL Periodical NA1 .A744 v.49, 2006)



  • "Daylight Performance of High Density Housing in Hong Kong-On Site Study of a Housing Estate at Lei Yue Mun". Technical Report for Ove Arup & Partners (TO 01814). Hong Kong SAR, 2001.



  • "Daylighting Quality Study in Hong Kong Schools". Application of Natural Light and Solar Energy Technologies in China (co-authored with WU Wei). Beijing, China: Beijing Light and Lighting Association, 2002. pp.155-173.



  • "Daylighting Simulation of Heavily Obstructed Residental Buildings in Hong Kong". Proceedings of International Building Performance Simulation Association Conference ed. by Lamberts R, Negrao C O R and Henson J. vol.2, Rio, Brazil: International Building Performance Simulation Association, 2001. pp.1215-1222.



  • "Defining Standard Skies For Better Daylight Design In Hong Kong" (co-authored with CHENG V; GADI A and HE Z J). Solar 2007 organized by American Solar Energy Society. Ohio, USA, 2007.07.



  • "Defining Standard Skies for Better Daylight Design in Hong Kong" (co-authored with HE, ZHENGJUN). Paper presented in the National Solar Energy Conference, organized by American Solar Energy Society. Cleveland, United States of America, 2007.07.08.



  • "Defining Standard Skies for Hong Kong" (co-authored with CHENG Bo Ki, GADI Ankur, MU JUN, LEE Yiu Wa and GADI Ankit). Building and Environment vol.42. USA: Elsevier Ltd., 2007. pp.866-876.
    (CUHK Library Call No: ARL Periodical TH1 .B847 v.42, no.1-2, 2007)



  • "Defining Standard Skies for Hong Kong". Paper presented in the CISBAT International Scientific Conference 2007, organized by Solar Energy and Building Physics Laboratory LESO-PB of the EPFL. Lausanne, Switzerland, 2007.09.



  • "Dense and Green: Towards Sustainable Habitation in Hong Kong" (co-authored with WONG Kam Sing). The Third China Urban Housing Conference ed. by Tsou Jin-Yeu. Hong Kong SAR: CUHK, 2003.07.



  • "A Design Tool for Regulating Daylight Availability for High Density Housing in Hong Kong" (co-authored with TREGENZA Peter). Hong Kong SAR, 2001.



  • "Determining Site Wind Availability for Air Ventilation Assessment in Hong Kong’s Coastal and Highly Complex Topographical Conditions" (co-authored with FUNG Jimmy). Paper presented in the 4th International Conference on Advances in Wind & Structures, organized by C K Choi. Seoul, Korea, 2008.05.



  • "Effect of Envelope Colour and Thermal mass in Hot Humid Hong Kong" (co-authored with CHENG Bo Ki and GIVONI Baruch). 1st InternationalConference on Sustainable Energy and Green Achitecture ed. by Baruch Givoni and Michel Daguenet. Bangkok, Thailand: BSRC, King Mongkut's University of Technology Thonburi, 2003.10.



  • "Effect of Envelope Colour and Thermal Mass in Hot Humid Hong Kong" (co-authored with CHENG Bo Ki and GIVONI Baruch). Solar Energy vol.78 no.4, USA: Elsevier Science Direct, 2005.04. pp.528-534.



  • "Efficiency & Liveability: Towards Sustainable Habitation in Hong Kong" (co-authored with WONG Kam Sing). Hong Kong Housing Authoriy Conference 2004 Hong Kong, 2004.02.



  • "Envelope Colour on Thermal Load in Hot Humid Hong Kong: Effect of Hue, Value and Chroma" (co-authored with CHENG Bo Ki). Journal of Chongqing University vol.2. Chongqing, China: Chongqing University, 2003.10. pp.51-56.



  • "An Experiment of Urban Human Thermal Comfort in Hot and Humid Sub-Tropical City of Hong Kong under High Density Urban Morphological Conditions" (co-authored with CHAN Shuk Kwan Cecilia, CHENG B K and GIVONI B). Paper presented in the 4th International Conference on Advances in Wind & Structures, organized by C K Choi. Seoul, Korea, 2008.05.



  • "Green Architecture in Hong Kong, the Densest City in the World". Green Architecture-an International Comparison London, UK: Academy Edition, John Wiley & Son Inc., 2001.



  • "High Density and Environmental sustainability in Hong Kong – a personal view of an imaginary future". World Architecture, China ed. Laurence Liauw. no.208, Beijing, China, 2007.10. pp.127-128.



  • Hong Kong Sea Breeze Investigation Report – Urban Climatic Map and Standards for Wind Environment – Feasibility Study (co-authored with AN Xi Po). Technical Report for Planning Department HKSAR. Hong Kong, 2008.01.



  • "An Initial Investigation of Urban Climate in High Density Cities—An Experience from Hong Kong" (co-authored with REN, CHAO, WANG Yingna and KATZSCHNER Lutz). Paper presented in the CISBAT 2007 International Conference, organized by Solar Energy and Building Physics Laboratory LESO-PB of the EPFL. Lausanne, Switzerland, 2007.09.



  • "An Investigation of Ventilation at Ground Level in High Density Cities – An Initial Study in Hong Kong" (co-authored with REN, CHAO). Paper presented in the PLEA International Conference 2007, organized by NUS, Singapore, 2007.11. p.142-147.



  • "A Large Eddy Simulation Study of an Extremely Dense Neighbourhood in Hong Kong – an Experience of Methodology and Results" (co-authored with AN Xi Po and LETZEL M). Paper presented in the PLEA International Conference 2007, organized by NUS, Singapore, 2007.11. p.615-619.



  • "A New Method for Daylight Design of High-Density Cities – Experiences from Hong Kong". InternationalConference of PLEA ed. by Waldo Bustamante G and Eugeno Collados B. Santiago, Chile, 2003.11.



  • On site Daylighting Measurement - High rise Residential Buildings in Hong Kong Hong Kong SAR, 2000.11.



  • "Outdoor Thermal Comfort for Hong Kong People: A Longitudinal Study" (co-authored with CHENG Bo Ki). Paper presented in the PLEA International Conference 2007, organized by NUS, Singapore, 2007.11. p.663-668.



  • "Passively Green – Labelling Light and Air in Hong Kong". Symposium on Green BuildingLabelling ed. by K S Wong et al. Hong Kong: Professional Green Building COuncil, 2004.03. pp.85-95.



  • "Physical Thermal Signature and Performance of high-Rise Housing in Hong Kong" (co-authored with CHENG BO KI and GIVONI Baruch). Hong Kong Housing Authoty Conference 2004 Hong Kong, 2004.02.



  • "A Pilot Study of Outdoor Thermal Comfort in Hong Kong". Paper presented in the Fabricating Sustainability - 39th Annual Architectural Science Association Conference, organized by ANZAScA. New Zealand, 2005.11.



  • "A Pilot Study of Urban Ventilation and Wall Effects of Buildings in High Density City Design – an Experience of Hong Kong" (co-authored with KIANG K, LAM M and YUEN E). Paper presented in the PLEA International Conference 2007, organized by NUS, Singapore, 2007.11. p.477-482.



  • "Planning for Natural Light and Ventilation in High Density City – A Position Based on the Review of Historical Events in Hong Kong". Planning and Development: Journal of the Hong Kong Institute of Planners vol.19 no.1, Hong Kong: Hong Kong Institute of Planners, 2004. pp.2-10.
    (CUHK Library Call No: ARL Periodical HT169.H6 P5 v.19, no.1, 2004)



  • "Policies and Technical Guidelines for Urban Planning of High Density Cities – Air Ventilation Assessment (AVA) of Hong Kong". Paper presented in the 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings IAQVEC07, organized by Tohoku University. Sendai, Japan, 2007.10.



  • "Regulate for Light, Air and Healthy Living - Part II Regulating the Provision of Natural Light and Ventilation of Buildings in Hong Kong". Hong Kong Institute of Architects Journal vol.37. Hong Kong: Pace Publication on behalf of HKIA, 2004. pp.4-27.
    (CUHK Library Call No: UL HKS Periodical NA17.H6 H5 no.37-44, 2004-05; ARL Periodical NA17.H6 H5 no.37-40, 2004)



  • "Regulating and Guiding better building and urban design in Hong Kong Environmentally". Paper presented in the PALENC International Conference - Passive and Low Energy Cooling for the Built Environment 2005, organized by University of Athens, Athens, Greece, 2005. p.923-928.



  • "Sensitivity of Envelope Colour: Effect of Thermal Mass, Windows, and Natural Ventilation on High-rise Buildings in Hot Humid Hong Kong" (co-authored with CHENG Bo Ki and GIVONI Baruch). International PLEA Conference 2003 ed. by Waldo Bustamante G. and Eugenio Collados B. Santiago, Chile, 2003.11.



  • "Students Response to Daylighting Issues in School Buildings in the High Density City for Hong Kong" (co-authored with WU Wei and MURTY P). ANZAScA 2002 Victoria, Australia: The Australian and New Zealand Architectural Science Association, 2002.



  • "Studies of Urban Thermal Comfort in Hong Kong" (co-authored with CHENG BO KI). Paper presented in the International Expert Workshop on Thermal Comfort in Urban Planning and Architecture under Consideration of Global Climate Change, organized by Kassel University Department of Environmental Meteorology. Kassel, Germany, 2008.02.



  • "Studies on Daylight Design of High Density Residential Housing in Hong Kong". International Journal of Lighting Research and Technology vol.35 no.2, United Kingdom: Chartered Insitution of Building Services Engineers, 2003. pp.127-140.
    (CUHK Library Call No: ARL Periodical TH7700.I4 A13 v.35, 2003)



  • "Studies on Daylight Performance of High Density Residential Housing in Hong Kong Using On Site Measurement Data and Computational Simulation". Tropical Daylight and Buildings 2002 ed. by Tregenza Peter. Singapore: National University of Singapore, 2002.



  • A Study of Solar Resources and Researches in Hong Kong (co-authored with GANDI Ankur and CHENG Vicky Bo Ki). Technical Report for CLP Research Institute. Hong Kong, 2005.02



  • "The Sustainability of High Density, Hong Kong, China". Planning and Design Strategies for Sustainability and Profit ed. by Adrian Pitts. London, United Kingdom: Architectural Press -Elsevier, 2004. pp.204-218.
    (CUHK Library Call No: ARL NA2542.36 .P578 2004)



  • "Thermal Comfort in Urban Open Spaces for hong Kong" (co-authored with CHENG Bo Ki). Architectural Science Review vol.49 no.3, Sydney, 2006.09. pp.236-242.
    (CUHK Library Call No: ARL Periodical NA1 .A744 v.49, 2006)



  • "Towards Better Wind, Daylight and Natural Ventilation for Buildings and Urban Spaces in Ultra-Dense Cities - an Experience from Hong Kong". Paper presented in the The 2005 World Sustainable Building Conference in Tokyo SB05, organized by SB-05, 3B-02. Tokyo, Japan, 2005.09.



  • "Towards Formulating an Urban Climatic Map - an Experience from Hong Kong". Paper presented in the PLEA International Conference 2007, organized by NUS, Singapore, 2007.11. p.465-470.



  • "Ventilation Investigations in a densely built up Area of Hong Kong to describe Thermal Comfort" (co-authored with KATZSCHNER L). Paper presented in the METTOOLS VI, organized by Institut für Meteorologie und Klimaforschung. Karlsruhe, Germany, 2007.04, p. 23-31



  • "Ventilation Investigations in a Densely Built up Area of Hong Kong to Describe Thermal Comfort" (co-authored with KATZSCHNER Lutz). Paper presented in the PLEA International Conference 2006, organized by Universite de Geneve. Geneva, Switzerland, 2006.09.



  • "Wind Code, Air Quality Standards and Air Ventilation Assessment for Hong Kong - Latest Developments" (co-authored with KWOK K C S and KOT S C). Paper presented in the 3rd Workshop on Regional Harmonization of Wind Loading and Wind Environment Specifications in Asia-Pacific Economies, organized by Indian Society for Wind Engineering. India, 2006.11.



  • "Wind Code, Air Quality Standards and Air Ventilation Assessment for Hong Kong, Hong Kong Economy Report 2005" (co-authored with KWOK Kenny and KOT S C). Paper presented in the 2nd Workshop on Regional Harmonisation of Wind Loading and Wind Environmental Specifications in Asia-Pacific Economies, organized by APEC-WW. Hong Kong, 2005.12.


* Name of external researcher
# Name of staff who has left the University